2365 lines
71 KiB
C#
2365 lines
71 KiB
C#
#region License, Terms and Author(s)
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//
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// BackLINQ
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// Copyright (c) 2008 Atif Aziz. All rights reserved.
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//
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// Author(s):
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//
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// Dominik Hug, http://www.dominikhug.ch
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//
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// This library is free software; you can redistribute it and/or modify it
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// under the terms of the New BSD License, a copy of which should have
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// been delivered along with this distribution.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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// PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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#endregion
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using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.Collections.ObjectModel;
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using System.Globalization;
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using System.Text;
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using System.Threading;
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using NUnit.Framework;
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using System.Linq;
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using NUnit.Framework.SyntaxHelpers;
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using NUnit.Framework.Constraints;
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using System.Diagnostics;
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namespace NUnit.Framework.SyntaxHelpers { class Dummy {} }
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namespace MonoTests.System.Linq
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{
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[TestFixture]
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public sealed class EnumerableFixture {
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private CultureInfo initialCulture; // Thread culture saved during Setup to be undone in TearDown.
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private AssertionHandler tearDownAssertions;
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private delegate void AssertionHandler ();
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[SetUp]
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public void SetUp ()
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{
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tearDownAssertions = null;
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initialCulture = Thread.CurrentThread.CurrentCulture;
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Thread.CurrentThread.CurrentCulture = new CultureInfo ("de-CH");
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}
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[TearDown]
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public void TearDown ()
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{
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if (tearDownAssertions != null)
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tearDownAssertions ();
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Thread.CurrentThread.CurrentCulture = initialCulture;
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}
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[Test]
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[ExpectedException (typeof (InvalidOperationException))]
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public void Aggregate_EmptySource_ThrowsInvalidOperationException ()
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{
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var source = Read<object> ();
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source.Aggregate (delegate { throw new NotImplementedException (); });
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}
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[Test]
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public void Aggregate_AddFuncOnIntegers_ReturnsTotal ()
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{
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var source = Read (12, 34, 56, 78, 910, 1112, 1314, 1516, 1718, 1920);
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var result = source.Aggregate ((a, b) => a + b);
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Assert.That (result, Is.EqualTo (8670));
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}
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[Test]
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public void Aggregate_AddFuncOnIntegersWithSeed_ReturnsTotal ()
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{
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var source = Read (12, 34, 56, 78, 910, 1112, 1314, 1516, 1718, 1920);
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var result = source.Aggregate (100, (a, b) => a + b);
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Assert.That (result, Is.EqualTo (8770));
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}
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[Test]
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[ExpectedException (typeof (ArgumentNullException))]
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public void Aggregate_NullSource_ThrowsArgumentNullException ()
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{
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Enumerable.Aggregate<object> (null, delegate { throw new NotImplementedException (); });
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}
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[Test]
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[ExpectedException (typeof (ArgumentNullException))]
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public void Aggregate_NullFunc_ThrowsArgumentNullException ()
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{
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Read<object> ().Aggregate (null);
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}
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[Test]
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public void Empty_YieldsEmptySource ()
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{
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var source = Enumerable.Empty<string> ();
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Assert.That (source, Is.Not.Null);
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var e = source.GetEnumerator ();
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Assert.That (e, Is.Not.Null);
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Assert.That (e.MoveNext (), Is.False);
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}
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[Test]
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[ExpectedException (typeof (ArgumentNullException))]
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public void Cast_NullSource_ThrowsArgumentNullException ()
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{
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Enumerable.Cast<object> (null);
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}
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[Test]
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[ExpectedException (typeof (InvalidCastException))]
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public void Cast_InvalidSource_ThrowsInvalidCastException ()
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{
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var source = Read (1000, "hello", new object ());
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var e = source.Cast<byte> ().GetEnumerator ();
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e.MoveNext (); // Do something so Cast will really run (deferred execution)
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}
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[Test]
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public void Cast_ObjectSourceContainingIntegers_YieldsDowncastedIntegers ()
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{
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var source = Read<object> (1, 10, 100);
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source.Cast<int> ().AssertEquals (1, 10, 100);
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}
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[Test]
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public void Cast_Integers_YieldsUpcastedObjects ()
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{
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#if false
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// shouldn't this be inferred?
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Read (1, 10, 100).Cast<object> ().AssertEquals (1, 10, 100);
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#else
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Read (1, 10, 100).Cast<object> ().AssertEquals<object> (1, 10, 100);
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#endif
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}
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[Test]
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[ExpectedException (typeof (ArgumentNullException))]
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public void All_NullSource_ThrowsArgumentNullException ()
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{
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Enumerable.All (null, (int i) => { throw new NotImplementedException (); });
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}
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[Test]
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public void All_SomeSourceElementsNotSatifyingPredicate_ReturnsFalse ()
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{
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var source = Read (-100, -1, 0, 1, 100);
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Assert.That (source.All (i => i < 0), Is.False);
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}
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[Test]
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public void All_SourceElementsSatisfyingPredicate_ReturnsTrue ()
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{
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var source = Read (-100, -1, 0, 1, 100);
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Assert.That (source.All (i => i >= -100), Is.True);
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}
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[Test]
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[ExpectedException (typeof (ArgumentNullException))]
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public void Any_NullSource_ThrowsArgumentNullException ()
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{
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Enumerable.Any<object> (null);
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}
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[Test]
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public void Any_EmptySource_ReturnsFalse ()
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{
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var source = Read<object> ();
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Assert.That (source.Any (), Is.False);
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}
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[Test]
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public void Any_NonEmptySource_ReturnsTrue ()
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{
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var source = Read (new object ());
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Assert.That (source.Any (), Is.True);
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}
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[Test]
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public void Any_PredicateArg_EmptySource_ReturnsFalse ()
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{
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var source = Read (new int [0]);
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Assert.That (source.Any (delegate { throw new NotImplementedException (); }), Is.False);
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}
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[Test]
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public void Any_PredicateArg_NonEmptySource_ReturnsTrue ()
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{
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Assert.That (Read (1, 2, 3, 4, 5).Any (i => i > 2), Is.True);
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}
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[Test]
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[ExpectedException (typeof (InvalidOperationException))]
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public void Average_EmptyLongSource_ThrowsInvalidOperationException ()
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{
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Read<long> ().Average ();
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}
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[Test]
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public void Average_Longs_ReturnsAverage ()
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{
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Assert.That (Read (25L, 75L).Average (), Is.EqualTo (50));
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}
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[Test]
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public void Average_SelectorArg_Longs_ReturnsAverage ()
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{
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Assert.That (Read (25L, 75L).Average (n => n * 2L), Is.EqualTo (100));
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}
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[Test]
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public void Average_EmptyNullableLongSource_Null ()
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{
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Assert.That (Read<long?> ().Average (), Is.Null);
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}
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[Test]
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public void Average_NullableLongsWithSomeNull_ReturnsAverage ()
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{
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Assert.That (Read<long?> (12L, null, 34L, null, 56L).Average (), Is.EqualTo (34.0));
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}
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[Test]
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public void Average_SelectorArg_NullableLongsWithSomeNull_ReturnsAverage ()
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{
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Assert.That (Read<long?> (12L, null, 34L, null, 56L).Average (n => n * 2L), Is.EqualTo (68.0));
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}
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[Test]
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public void Average_EmptyNullableIntegerSource_Null ()
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{
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Assert.That (Read<int?> ().Average (), Is.Null);
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}
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[Test]
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public void Average_NullableIntegersWithSomeNull_ReturnsAverage ()
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{
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Assert.That (Read<int?> (12, null, 34, null, 56).Average (), Is.EqualTo (34.0));
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}
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[Test]
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public void Average_SelectorArg_NullableIntegersWithSomeNull_ReturnsAverage ()
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{
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Assert.That (Read<int?> (12, null, 34, null, 56).Average (n => n * 2), Is.EqualTo (68.0));
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}
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[Test]
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[ExpectedException (typeof (InvalidOperationException))]
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public void Average_EmptyDecimalSource_ThrowsInvalidOperationException ()
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{
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Read<decimal> ().Average ();
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}
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[Test]
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public void Average_Decimals_ReturnsAverage ()
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{
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var source = Read (-10000m, 2.0001m, 50m);
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Assert.That (source.Average (), Is.EqualTo (-3315.999966).Within (0.00001));
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}
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[Test]
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public void Average_SelectorArg_Decimals_ReturnsAverage ()
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{
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var source = Read (-10000m, 2.0001m, 50m);
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Assert.That (source.Average (n => n * 2m), Is.EqualTo (-6631.999933).Within (0.00001));
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}
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[Test]
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[ExpectedException (typeof (InvalidOperationException))]
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public void Average_EmptySource_ThrowsInvalidOperationException ()
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{
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Read<int> ().Average ();
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}
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[Test]
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public void Average_EmptyNullableIntegerSource_ReturnsNull ()
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{
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Assert.That (Read<int?> ().Average (), Is.Null);
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}
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[Test]
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public void Average_SelectorArg_Integers_ReturnsAverage ()
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{
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Assert.That (Read (21, 22, 23, 24).Average (n => n * 2).Equals (45));
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}
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[Test]
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[ExpectedException (typeof (InvalidOperationException))]
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public void Average_EmptyDoubleSource_ThrowsInvalidOperationException ()
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{
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Read<double> ().Average ();
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}
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[Test]
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public void Average_Doubles_ReturnsAverage ()
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{
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var source = Read (-3.45, 9.001, 10000.01);
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Assert.That (source.Average (), Is.EqualTo (3335.187).Within (0.01));
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}
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[Test]
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public void Average_SelectorArg_Doubles_ReturnsAverage ()
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{
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var source = Read (-3.45, 9.001, 10000.01);
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Assert.That (source.Average (n => n * 2.0), Is.EqualTo (6670.374).Within (0.01));
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}
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[Test]
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[ExpectedException (typeof (InvalidOperationException))]
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public void Average_EmptyFloatSource_ThrowsInvalidOperationException ()
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{
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Read<float> ().Average ();
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}
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[Test]
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public void Average_Floats_ReturnsAverage ()
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{
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var source = Read (-3.45F, 9.001F, 10000.01F);
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Assert.That (source.Average (), Is.EqualTo (3335.187).Within (0.01));
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}
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[Test]
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public void Average_SelectorArg_Floats_ReturnsAverage ()
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{
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var source = Read (-3.45F, 9.001F, 10000.01F);
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Assert.That (source.Average (n => n * 2F), Is.EqualTo (6670.37354).Within (0.01));
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}
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[Test]
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public void Average_EmptyNullableFloatSource_Null ()
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{
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Assert.That (Read<float?> ().Average (), Is.Null);
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}
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[Test]
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public void Average_NullableFloatsWithSomeNulls_ReturnsAverage ()
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{
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var source = Read<float?> (-3.45F, null, 9.001F, null, 10000.01F);
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Assert.That (source.Average (), Is.EqualTo (3335.187).Within (0.01));
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}
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[Test]
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public void Average_SelectorArg_NullableFloatsWithSomeNulls_ReturnsAverage ()
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{
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var source = Read<float?> (-3.45F, null, 9.001F, null, 10000.01F);
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Assert.That (source.Average (n => n * 2F), Is.EqualTo (6670.37354).Within (0.01));
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}
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[Test]
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public void Average_EmptyNullableDoubleSource_Null ()
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{
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Assert.That (Read<double?> ().Average (), Is.Null);
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}
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[Test]
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public void Average_NullableDoublesWithSomeNulls_ReturnsAverage ()
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{
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var source = Read<double?> (-3.45, null, 9.001, null, 10000.01);
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Assert.That (source.Average (), Is.EqualTo (3335.187).Within (0.01));
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}
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[Test]
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public void Average_SelectorArg_NullableDoublesWithSomeNulls_ReturnsAverage ()
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{
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var source = Read<double?> (-3.45, null, 9.001, null, 10000.01);
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Assert.That (source.Average (n => n * 2.0), Is.EqualTo (6670.374).Within (0.01));
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}
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[Test]
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public void Average_EmptyNullableDecimalSource_Null ()
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{
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Assert.That (Read<decimal?> ().Average (), Is.Null);
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}
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[Test]
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public void Average_NullableDecimalsWithSomeNulls_ReturnsAverage ()
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{
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var source = Read<decimal?> (-3.45m, null, 9.001m, null, 10000.01m);
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Assert.That (source.Average (), Is.EqualTo (3335.187).Within (0.01));
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}
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[Test]
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public void Average_SelectorArg_NullableDecimalsWithSomeNulls_ReturnsAverage ()
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{
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var source = Read<decimal?> (-3.45m, null, 9.001m, null, 10000.01m);
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Assert.That (source.Average (n => n * 2m), Is.EqualTo (6670.374m).Within (0.01));
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}
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[Test]
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[ExpectedException (typeof (ArgumentNullException))]
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public void Concat_FirstSourceNull_ThrowsArgumentNullException ()
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{
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Enumerable.Concat (null, new object [0]);
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}
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[Test]
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[ExpectedException (typeof (ArgumentNullException))]
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public void Concat_SecondSourceNull_ThrowsArgumentNullException ()
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{
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new object [0].Concat (null);
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}
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[Test]
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public void Concat_TwoSequences_CombinedSequenceWhereElementsOfSecondFollowFirst ()
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{
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var first = Read (12, 34, 56);
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var second = Read (78, 910, 1112);
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first.Concat (second).AssertEquals (12, 34, 56, 78, 910, 1112);
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}
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[Test]
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public void Contains_SequenceContainingSoughtValue_ReturnsTrue ()
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{
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var source = Read (12, -15, 21);
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Assert.That (source.Contains (21), Is.True);
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}
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[Test]
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public void Contains_SequenceWithoutSoughtValue_ReturnsFalse ()
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{
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var source = Read (-2, 4, 8);
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Assert.That (source.Contains (9), Is.False);
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}
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[Test]
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public void Contains_CollectionOptimization_ReturnsTrueWithoutEnumerating ()
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{
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var source = new NonEnumerableList<int> (new [] { 1, 2, 3 });
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// IMPORTANT! Use the non-extension invocation style below
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// to avoid calling List<T>.Contains instead of
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// Enumerable.Contains.
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Assert.That (Enumerable.Contains (source, 3), Is.True);
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}
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[Test]
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public void Count_Integers_ReturnsNumberOfElements ()
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{
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Assert.That (Read (12, 34, 56).Count (), Is.EqualTo (3));
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}
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[Test]
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public void Count_PredicateArg_Strings_CountsOnlyStringsWithEvenLength ()
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{
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var source = Read ("A", "AB", "ABC", "ABCD");
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Assert.That (source.Count (s => s.Length % 2 == 0), Is.EqualTo (2));
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}
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[Test]
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public void DefaultIfEmpty_Integers_YieldsIntegersInOrder ()
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{
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var source = Read (12, 34, 56);
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source.DefaultIfEmpty (1).AssertEquals (12, 34, 56);
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}
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[Test]
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public void DefaultIfEmpty_EmptyIntegerSequence_ReturnsZero ()
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{
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var source = Read (new int [0]);
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source.DefaultIfEmpty ().AssertEquals (0);
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}
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[Test]
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public void DefaultIfEmpty_DefaultValueArg_EmptyIntegerSequenceAndNonZeroDefault_ReturnNonZeroDefault ()
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{
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var source = Read (new int [0]);
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source.DefaultIfEmpty (5).AssertEquals (5);
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}
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[Test]
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public void DefaultIfEmpty_DefaultValueArg_Integers_YieldsIntegersInOrder ()
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{
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var source = Read (12, 34, 56);
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source.DefaultIfEmpty (5).AssertEquals (12, 34, 56);
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}
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[Test]
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[ExpectedException (typeof (ArgumentNullException))]
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public void Distinct_NullSource_ThrowsArgumentNullException ()
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{
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Enumerable.Distinct<object> (null);
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}
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[Test]
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public void Distinct_IntegersWithSomeDuplicates_YieldsIntegersInSourceOrderWithoutDuplicates ()
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{
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var source = Read (12, 34, 34, 56, 78, 78, 78, 910, 78);
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source.Distinct ().AssertEquals (12, 34, 56, 78, 910);
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}
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[Test]
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public void Distinct_MixedCaseStringsWithCaseIgnoringComparer_YieldsFirstCaseOfEachDistinctStringInSourceOrder ()
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{
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var source = Read ("Foo Bar BAZ BaR baz FOo".Split ());
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source.Distinct (StringComparer.InvariantCultureIgnoreCase).AssertEquals ("Foo", "Bar", "BAZ");
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}
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[Test]
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[ExpectedException (typeof (ArgumentOutOfRangeException))]
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public void ElementAt_IndexOutOfRange_ThrowsArgumentOutOfRangeException ()
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{
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var source = Read (3, 5, 7);
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source.ElementAt (3);
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}
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[Test]
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public void ElementAt_Integers_ReturnsValueAtGivenIndex ()
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{
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var source = new [] { 15, 2, 7 };
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Assert.That (Read (source).ElementAt (0), Is.EqualTo (15));
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Assert.That (Read (source).ElementAt (1), Is.EqualTo (2));
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Assert.That (Read (source).ElementAt (2), Is.EqualTo (7));
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}
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|
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[Test]
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[ExpectedException (typeof (ArgumentOutOfRangeException))]
|
|
public void ElementAt_NegativeIndex_ThrowsArgumentOutOfRangeException ()
|
|
{
|
|
Read<int> ().ElementAt (-1);
|
|
}
|
|
|
|
[Test]
|
|
public void ElementAt_ListOptimization_ReturnsValueAtGivenIndex ()
|
|
{
|
|
var source = new NonEnumerableList<int> (new [] { 1, 2, 3, 4, 5, 6 });
|
|
Assert.That (source.ElementAt (2), Is.EqualTo (3));
|
|
}
|
|
|
|
[Test]
|
|
public void ElementAt_ReadOnlyListOptimization_ReturnsValueAtGivenIndex()
|
|
{
|
|
var source = new NonEnumerableReadOnlyList<int> (new List<int> (new[] { 1, 2, 3, 4, 5, 6 }));
|
|
Assert.That(source.ElementAt (2), Is.EqualTo (3));
|
|
}
|
|
|
|
[Test]
|
|
public void ElementAtOrDefault_IntegersWithOutOfRangeIndex_ReturnsDefault ()
|
|
{
|
|
var source = Read (3, 6, 8);
|
|
Assert.That (source.ElementAtOrDefault (3), Is.EqualTo (0));
|
|
}
|
|
|
|
[Test]
|
|
public void ElementAtOrDefault_Integers_ReturnsValueAtGivenIndex ()
|
|
{
|
|
var source = Read (3, 6, 9);
|
|
Assert.That (source.ElementAtOrDefault (2), Is.EqualTo (9));
|
|
}
|
|
|
|
[Test]
|
|
public void ElementAtOrDefault_ListOptimization_ReturnsValueAtGivenIndex ()
|
|
{
|
|
var source = new NonEnumerableList<int> (new [] { 1, 2, 3, 4, 5, 6 });
|
|
Assert.That (source.ElementAtOrDefault (2), Is.EqualTo (3));
|
|
}
|
|
|
|
[Test]
|
|
public void ElementAtOrDefault_ReadOnlyListOptimization_ReturnsValueAtGivenIndex()
|
|
{
|
|
var source = new NonEnumerableReadOnlyList<int>(new List<int> (new[] { 1, 2, 3, 4, 5, 6 }));
|
|
Assert.That(source.ElementAtOrDefault (2), Is.EqualTo (3));
|
|
}
|
|
|
|
[Test]
|
|
public void ElementAtOrDefault_BooleansAndNegativeIndex_ReturnsDefault ()
|
|
{
|
|
var source = Read (true, false, true, false);
|
|
Assert.That (source.ElementAtOrDefault (-3), Is.False);
|
|
}
|
|
|
|
[Test]
|
|
public void ElementAtOrDefault_ObjectsWithOutOfRangeIndex_ReturnsNull ()
|
|
{
|
|
var source = Read (new object (), new object ());
|
|
Assert.That (source.ElementAtOrDefault (2), Is.EqualTo (null));
|
|
}
|
|
|
|
[Test]
|
|
public void ElementAtOrDefault_Objects_ReturnsValueAtGivenIndex ()
|
|
{
|
|
var second = new object ();
|
|
var source = Read (new object (), second, new object ());
|
|
Assert.That (source.ElementAt (1), Is.EqualTo (second));
|
|
}
|
|
|
|
[Test]
|
|
[ExpectedException (typeof (ArgumentNullException))]
|
|
public void Except_SecondArg_ArgumentNull_ThrowsArgumentNullException ()
|
|
{
|
|
Read<object> ().Except (null);
|
|
}
|
|
|
|
[Test]
|
|
public void Except_SecondArg_ValidArgument_ReturnsDifference ()
|
|
{
|
|
var first = Read (1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
|
|
var second = Read (1, 3, 5, 7, 9);
|
|
first.Except (second).AssertEquals (2, 4, 6, 8, 10);
|
|
}
|
|
|
|
[Test]
|
|
public void Except_SecondArgComparerArg_ComparerIsUsed ()
|
|
{
|
|
var first = Read ("albert", "john", "simon");
|
|
var second = Read ("ALBERT");
|
|
first.Except (second, StringComparer.CurrentCultureIgnoreCase).AssertEquals ("john", "simon");
|
|
}
|
|
|
|
[Test]
|
|
[ExpectedException (typeof (InvalidOperationException))]
|
|
public void First_EmptySource_ThrowsInvalidOperationException ()
|
|
{
|
|
Read<int> ().First ();
|
|
}
|
|
|
|
[Test]
|
|
public void First_Integers_ReturnsFirst ()
|
|
{
|
|
var source = Read (12, 34, 56);
|
|
Assert.That (source.First (), Is.EqualTo (12));
|
|
}
|
|
|
|
[Test]
|
|
public void First_IntegersWithPredicateForEvens_FirstEvenInteger ()
|
|
{
|
|
var source = Read (15, 20, 25, 30);
|
|
Assert.That (source.First (i => i % 2 == 0), Is.EqualTo (20));
|
|
}
|
|
|
|
[Test]
|
|
[ExpectedException (typeof (InvalidOperationException))]
|
|
public void First_IntegerSequenceWithNoneMatchingPredicate_ThrowsInvalidOperationException ()
|
|
{
|
|
var source = Read (12, 34, 56, 78);
|
|
Assert.That (source.First (i => i > 100), Is.EqualTo (0));
|
|
}
|
|
|
|
[Test]
|
|
public void FirstOrDefault_EmptyBooleanSource_ReturnsFalse ()
|
|
{
|
|
Assert.That (Read<bool> ().FirstOrDefault (), Is.False);
|
|
}
|
|
|
|
[Test]
|
|
public void FirstOrDefault_Objects_ReturnsFirstReference ()
|
|
{
|
|
var first = new object ();
|
|
var source = Read (first, new object ());
|
|
Assert.That (source.FirstOrDefault (), Is.SameAs (first));
|
|
}
|
|
|
|
[Test]
|
|
[ExpectedException (typeof (ArgumentNullException))]
|
|
public void FirstOrDefault_PredicateArg_NullPredicate_ThrowsArgumentNullException ()
|
|
{
|
|
Read<int> ().FirstOrDefault (null);
|
|
}
|
|
|
|
[Test]
|
|
public void FirstOrDefault_PredicateArg_NonNullPredicate_ReturnsFirstMatchingItem ()
|
|
{
|
|
var source = Read (1, 4, 8);
|
|
Assert.That (source.FirstOrDefault (i => i % 2 == 0), Is.EqualTo (4));
|
|
}
|
|
|
|
[Test]
|
|
public void FirstOrDefault_PredicateArg_IntegerSequenceWithNonMatchingPredicate_ReturnsDefaultValue ()
|
|
{
|
|
var source = Read (1, 4, 6);
|
|
Assert.That (source.FirstOrDefault (i => i > 10), Is.EqualTo (0));
|
|
}
|
|
|
|
[Test]
|
|
public void First_IntegerListOptimization_ReturnsFirstElementWithoutEnumerating ()
|
|
{
|
|
var source = new NonEnumerableList<int> (new [] { 123, 456, 789 });
|
|
Assert.That (source.First (), Is.EqualTo (123));
|
|
}
|
|
|
|
private class Person {
|
|
public string FirstName { get; set; }
|
|
public string LastName { get; set; }
|
|
public int Age { get; set; }
|
|
|
|
public static Person [] CreatePersons ()
|
|
{
|
|
return new []
|
|
{
|
|
new Person { LastName = "M\u00FCller", FirstName = "Peter", Age = 21 },
|
|
new Person { LastName = "M\u00FCller", FirstName = "Herbert", Age = 22 },
|
|
new Person { LastName = "Meier", FirstName = "Hubert", Age = 23 },
|
|
new Person { LastName = "Meier", FirstName = "Isidor", Age = 24 }
|
|
};
|
|
}
|
|
|
|
public static Person [] CreatePersonsWithNamesUsingMixedCase ()
|
|
{
|
|
var persons = CreatePersons ();
|
|
var herbert = persons [1];
|
|
herbert.LastName = herbert.LastName.ToLower ();
|
|
var isidor = persons [3];
|
|
isidor.LastName = isidor.LastName.ToLower ();
|
|
return persons;
|
|
}
|
|
}
|
|
|
|
[Test]
|
|
[ExpectedException (typeof (ArgumentNullException))]
|
|
public void GroupBy_KeySelectorArg_NullAsKeySelector_ThrowsArgumentNullException ()
|
|
{
|
|
Read<object> ().GroupBy<object, object> (null);
|
|
}
|
|
|
|
[Test]
|
|
public void GroupBy_KeySelectorArg_ValidArguments_CorrectGrouping ()
|
|
{
|
|
var persons = Read (Person.CreatePersons ());
|
|
var result = new Reader<IGrouping<string, Person>> (persons.GroupBy (person => person.LastName));
|
|
|
|
var group1 = result.Read ();
|
|
Assert.That (group1.Key, Is.EqualTo ("M\u00FCller"));
|
|
var muellers = new Reader<Person> (group1);
|
|
Assert.That (muellers.Read ().FirstName, Is.EqualTo ("Peter"));
|
|
Assert.That (muellers.Read ().FirstName, Is.EqualTo ("Herbert"));
|
|
|
|
var group2 = result.Read ();
|
|
Assert.That (group2.Key, Is.EqualTo ("Meier"));
|
|
var meiers = new Reader<Person> (group2);
|
|
Assert.That (meiers.Read ().FirstName, Is.EqualTo ("Hubert"));
|
|
Assert.That (meiers.Read ().FirstName, Is.EqualTo ("Isidor"));
|
|
|
|
result.AssertEnded ();
|
|
}
|
|
|
|
[Test]
|
|
public void GroupBy_KeySelectorArg_ValidArguments_CorrectCaseSensitiveGrouping ()
|
|
{
|
|
var persons = Read (Person.CreatePersonsWithNamesUsingMixedCase ());
|
|
|
|
var result = persons.GroupBy (person => person.LastName);
|
|
|
|
var e = result.GetEnumerator ();
|
|
Func<IGrouping<string, Person>, Person> first = g => new Reader<Person> (g).Read ();
|
|
|
|
e.MoveNext ();
|
|
Assert.That (e.Current.Key, Is.EqualTo ("M\u00FCller"));
|
|
Assert.That (first (e.Current).FirstName, Is.EqualTo ("Peter"));
|
|
|
|
e.MoveNext ();
|
|
Assert.That (e.Current.Key, Is.EqualTo ("m\u00FCller"));
|
|
Assert.That (first (e.Current).FirstName, Is.EqualTo ("Herbert"));
|
|
|
|
e.MoveNext ();
|
|
Assert.That (e.Current.Key, Is.EqualTo ("Meier"));
|
|
Assert.That (first (e.Current).FirstName, Is.EqualTo ("Hubert"));
|
|
|
|
e.MoveNext ();
|
|
Assert.That (e.Current.Key, Is.EqualTo ("meier"));
|
|
Assert.That (first (e.Current).FirstName, Is.EqualTo ("Isidor"));
|
|
|
|
Assert.That (e.MoveNext (), Is.False);
|
|
}
|
|
|
|
[Test]
|
|
public void GroupBy_KeySelectorArgComparerArg_KeysThatDifferInCasingNonCaseSensitiveStringComparer_CorrectGrouping ()
|
|
{
|
|
var persons = Read (Person.CreatePersonsWithNamesUsingMixedCase ());
|
|
|
|
var result = new Reader<IGrouping<string, Person>> (
|
|
persons.GroupBy (person => person.LastName, StringComparer.CurrentCultureIgnoreCase));
|
|
|
|
var group1 = result.Read ();
|
|
Assert.That (group1.Key, Is.EqualTo ("M\u00FCller"));
|
|
var muellers = new Reader<Person> (group1);
|
|
Assert.That (muellers.Read ().FirstName, Is.EqualTo ("Peter"));
|
|
Assert.That (muellers.Read ().FirstName, Is.EqualTo ("Herbert"));
|
|
|
|
var group2 = result.Read ();
|
|
Assert.That (group2.Key, Is.EqualTo ("Meier"));
|
|
var meiers = new Reader<Person> (group2);
|
|
Assert.That (meiers.Read ().FirstName, Is.EqualTo ("Hubert"));
|
|
Assert.That (meiers.Read ().FirstName, Is.EqualTo ("Isidor"));
|
|
|
|
result.AssertEnded ();
|
|
}
|
|
|
|
[Test]
|
|
public void GroupBy_KeySelectorArgElementSelectorArg_ValidArguments_CorrectGroupingAndProjection ()
|
|
{
|
|
var persons = Read (Person.CreatePersons ());
|
|
|
|
var result = new Reader<IGrouping<string, int>> (
|
|
persons.GroupBy (person => person.LastName, person => person.Age));
|
|
|
|
var group1 = result.Read ();
|
|
Assert.That (group1.Key, Is.EqualTo ("M\u00FCller"));
|
|
var muellers = new Reader<int> (group1);
|
|
Assert.That (muellers.Read (), Is.EqualTo (21));
|
|
Assert.That (muellers.Read (), Is.EqualTo (22));
|
|
|
|
var group2 = result.Read ();
|
|
Assert.That (group2.Key, Is.EqualTo ("Meier"));
|
|
var meiers = new Reader<int> (group2);
|
|
Assert.That (meiers.Read (), Is.EqualTo (23));
|
|
Assert.That (meiers.Read (), Is.EqualTo (24));
|
|
}
|
|
|
|
[Test]
|
|
public void GroupBy_KeySelectorArgResultSelectorArg_ValidArguments_CorrectGroupingProcessing ()
|
|
{
|
|
var persons = Read (Person.CreatePersons ());
|
|
|
|
var result = persons.GroupBy (
|
|
p => p.LastName,
|
|
(key, group) => {
|
|
var total = 0;
|
|
foreach (var p in group)
|
|
total += p.Age;
|
|
return key + ":" + total;
|
|
});
|
|
|
|
result.AssertEquals ("M\u00FCller:43", "Meier:47");
|
|
}
|
|
|
|
[Test]
|
|
public void GroupBy_KeySelectorArgElementSelectorArgComparerArg_ValidArguments_CorrectGroupingAndProcessing ()
|
|
{
|
|
var persons = Read (Person.CreatePersonsWithNamesUsingMixedCase ());
|
|
|
|
var result = new Reader<IGrouping<string, int>> (
|
|
persons.GroupBy (p => p.LastName, p => p.Age, StringComparer.CurrentCultureIgnoreCase));
|
|
|
|
var group1 = result.Read ();
|
|
Assert.That (group1.Key, Is.EqualTo ("M\u00FCller"));
|
|
var muellers = new Reader<int> (group1);
|
|
Assert.That (muellers.Read (), Is.EqualTo (21));
|
|
Assert.That (muellers.Read (), Is.EqualTo (22));
|
|
|
|
var group2 = result.Read ();
|
|
Assert.That (group2.Key, Is.EqualTo ("Meier"));
|
|
var meiers = new Reader<int> (group2);
|
|
Assert.That (meiers.Read (), Is.EqualTo (23));
|
|
Assert.That (meiers.Read (), Is.EqualTo (24));
|
|
}
|
|
|
|
[Test]
|
|
public void GroupBy_KeySelectorArgElementSelectorArgResultSelectorArg_ValidArguments_CorrectGroupingAndTransforming ()
|
|
{
|
|
var persons = Read (Person.CreatePersons ());
|
|
|
|
var result = persons.GroupBy (
|
|
p => p.LastName,
|
|
p => p.Age,
|
|
(key, ages) => {
|
|
var total = 0;
|
|
foreach (var age in ages)
|
|
total += age;
|
|
return key + ":" + total;
|
|
});
|
|
|
|
result.AssertEquals ("M\u00FCller:43", "Meier:47");
|
|
}
|
|
|
|
[Test]
|
|
public void GroupBy_KeySelectorArgResultSelectorArgComparerArg_ValidArguments_CorrectGroupingAndTransforming ()
|
|
{
|
|
var persons = Read (Person.CreatePersonsWithNamesUsingMixedCase ());
|
|
|
|
var result = persons.GroupBy (
|
|
p => p.LastName,
|
|
(key, values) => {
|
|
var total = 0;
|
|
foreach (var person in values)
|
|
total += person.Age;
|
|
return key + ":" + total;
|
|
},
|
|
StringComparer.CurrentCultureIgnoreCase);
|
|
|
|
result.AssertEquals ("M\u00FCller:43", "Meier:47");
|
|
}
|
|
|
|
[Test]
|
|
public void GroupBy_KeySelectorArgElementSelectorArgResultSelectorArgComparerArg_ValidArguments_CorrectGroupingAndTransforming ()
|
|
{
|
|
var persons = Read (Person.CreatePersonsWithNamesUsingMixedCase ());
|
|
|
|
var result = persons.GroupBy (
|
|
p => p.LastName,
|
|
p => p.Age,
|
|
(key, ages) => {
|
|
var total = 0;
|
|
foreach (var age in ages)
|
|
total += age;
|
|
return key + ":" + total;
|
|
},
|
|
StringComparer.CurrentCultureIgnoreCase);
|
|
|
|
result.AssertEquals ("M\u00FCller:43", "Meier:47");
|
|
}
|
|
|
|
class Pet {
|
|
public string Name { get; set; }
|
|
public string Owner { get; set; }
|
|
}
|
|
|
|
[Test]
|
|
public void GroupJoin_InnerArgOuterKeySelectorArgInnerKeySelectorArgResultSelectorArg_ValidArguments_CorrectGroupingAndJoining ()
|
|
{
|
|
var persons = Read (Person.CreatePersons ());
|
|
|
|
var barley = new Pet { Name = "Barley", Owner = "Peter" };
|
|
var boots = new Pet { Name = "Boots", Owner = "Herbert" };
|
|
var whiskers = new Pet { Name = "Whiskers", Owner = "Herbert" };
|
|
var daisy = new Pet { Name = "Daisy", Owner = "Isidor" };
|
|
|
|
var pets = Read (barley, boots, whiskers, daisy);
|
|
|
|
var result = persons.GroupJoin (pets, person => person.FirstName, pet => pet.Owner,
|
|
(person, ppets) => new { Owner = person, Pets = ppets });
|
|
|
|
using (var e = result.GetEnumerator ()) {
|
|
e.MoveNext (); Assert.That (e.Current.Owner.FirstName, Is.EqualTo ("Peter"));
|
|
e.Current.Pets.AssertThat (Is.SameAs, barley);
|
|
|
|
e.MoveNext (); Assert.That (e.Current.Owner.FirstName, Is.EqualTo ("Herbert"));
|
|
e.Current.Pets.AssertThat (Is.SameAs, boots, whiskers);
|
|
|
|
e.MoveNext (); Assert.That (e.Current.Owner.FirstName, Is.EqualTo ("Hubert"));
|
|
e.Current.Pets.AssertThat (Is.SameAs); // empty
|
|
|
|
e.MoveNext (); Assert.That (e.Current.Owner.FirstName, Is.EqualTo ("Isidor"));
|
|
e.Current.Pets.AssertThat (Is.SameAs, daisy);
|
|
|
|
Assert.That (e.MoveNext (), Is.False);
|
|
}
|
|
}
|
|
|
|
[Test]
|
|
public void GroupJoin_InnerArgOuterKeySelectorArgInnerKeySelectorArgResultSelectorArgComparerArg_ValidArguments_CorrectGroupingAndJoining ()
|
|
{
|
|
var persons = Read (Person.CreatePersons ());
|
|
|
|
var barley = new Pet { Name = "Barley", Owner = "Peter" };
|
|
var boots = new Pet { Name = "Boots", Owner = "Herbert" };
|
|
var whiskers = new Pet { Name = "Whiskers", Owner = "HeRbErT" };
|
|
var daisy = new Pet { Name = "Daisy", Owner = "Isidor" };
|
|
|
|
var pets = Read (barley, boots, whiskers, daisy);
|
|
|
|
var result = persons.GroupJoin (pets, person => person.FirstName, pet => pet.Owner,
|
|
(person, ppets) => new { Owner = person, Pets = ppets },
|
|
StringComparer.CurrentCultureIgnoreCase);
|
|
|
|
using (var e = result.GetEnumerator ()) {
|
|
e.MoveNext (); Assert.That (e.Current.Owner.FirstName, Is.EqualTo ("Peter"));
|
|
e.Current.Pets.AssertThat (Is.SameAs, barley);
|
|
|
|
e.MoveNext (); Assert.That (e.Current.Owner.FirstName, Is.EqualTo ("Herbert"));
|
|
e.Current.Pets.AssertThat (Is.SameAs, boots, whiskers);
|
|
|
|
e.MoveNext (); Assert.That (e.Current.Owner.FirstName, Is.EqualTo ("Hubert"));
|
|
e.Current.Pets.AssertThat (Is.SameAs); // empty
|
|
|
|
e.MoveNext (); Assert.That (e.Current.Owner.FirstName, Is.EqualTo ("Isidor"));
|
|
e.Current.Pets.AssertThat (Is.SameAs, daisy);
|
|
|
|
Assert.That (e.MoveNext (), Is.False);
|
|
}
|
|
}
|
|
|
|
[Test]
|
|
[ExpectedException (typeof (ArgumentNullException))]
|
|
public void GroupJoin_InnerArgOuterKeySelectorArgInnerKeySelectorArgResultSelectorArg_NullOuterKeySelector_ThrowsArgumentNullException ()
|
|
{
|
|
new object [0].GroupJoin<object, object, object, object> (
|
|
new object [0], null,
|
|
delegate { throw new NotImplementedException (); },
|
|
delegate { throw new NotImplementedException (); });
|
|
}
|
|
|
|
[Test]
|
|
[ExpectedException (typeof (ArgumentNullException))]
|
|
public void Intersect_NullSecondSource_ThrowsArgumentNullException ()
|
|
{
|
|
Read<object> ().Intersect (null);
|
|
}
|
|
|
|
[Test]
|
|
public void Intersect_IntegerSources_YieldsCommonSet ()
|
|
{
|
|
var first = Read (1, 2, 3);
|
|
var second = Read (2, 3, 4);
|
|
first.Intersect (second).AssertEquals (2, 3);
|
|
}
|
|
|
|
[Test]
|
|
public void Intersect_MixedStringsAndCaseInsensitiveComparer_YieldsCommonSetFromFirstSource ()
|
|
{
|
|
var first = Read ("Heinrich", "Hubert", "Thomas");
|
|
var second = Read ("Heinrich", "hubert", "Joseph");
|
|
var result = first.Intersect (second, StringComparer.CurrentCultureIgnoreCase);
|
|
result.AssertEquals ("Heinrich", "Hubert");
|
|
}
|
|
|
|
[Test]
|
|
[ExpectedException (typeof (ArgumentNullException))]
|
|
public void Join_InnerArgOuterKeySelectorArgInnerKeySelectorArgResultSelectorArg_PassNullAsArgument_ThrowsArgumentNullException ()
|
|
{
|
|
Read<object> ().Join<object, object, object, object> (null, null, null, null);
|
|
}
|
|
|
|
[Test]
|
|
public void Join_InnerArgOuterKeySelectorArgInnerKeySelectorArgResultSelectorArg_PassingPetsAndOwners_PetsAreCorrectlyAssignedToOwners ()
|
|
{
|
|
var persons = Read (Person.CreatePersons ());
|
|
|
|
var pets = new Reader<Pet> (new []
|
|
{
|
|
new Pet {Name = "Barley", Owner = "Peter"},
|
|
new Pet {Name = "Boots", Owner = "Herbert"},
|
|
new Pet {Name = "Whiskers", Owner = "Herbert"},
|
|
new Pet {Name = "Daisy", Owner = "Isidor"}
|
|
});
|
|
|
|
var result = persons.Join (pets, aPerson => aPerson.FirstName, aPet => aPet.Owner,
|
|
(aPerson, aPet) => new { Owner = aPerson.FirstName, Pet = aPet.Name });
|
|
|
|
var e = result.GetEnumerator ();
|
|
|
|
Assert.That (e.MoveNext (), Is.True);
|
|
Assert.That (e.Current.Owner, Is.EqualTo ("Peter"));
|
|
Assert.That (e.Current.Pet, Is.EqualTo ("Barley"));
|
|
|
|
Assert.That (e.MoveNext (), Is.True);
|
|
Assert.That (e.Current.Owner, Is.EqualTo ("Herbert"));
|
|
Assert.That (e.Current.Pet, Is.EqualTo ("Boots"));
|
|
|
|
Assert.That (e.MoveNext (), Is.True);
|
|
Assert.That (e.Current.Owner, Is.EqualTo ("Herbert"));
|
|
Assert.That (e.Current.Pet, Is.EqualTo ("Whiskers"));
|
|
|
|
Assert.That (e.MoveNext (), Is.True);
|
|
Assert.That (e.Current.Owner, Is.EqualTo ("Isidor"));
|
|
Assert.That (e.Current.Pet, Is.EqualTo ("Daisy"));
|
|
|
|
Assert.That (e.MoveNext (), Is.False);
|
|
}
|
|
|
|
[Test]
|
|
public void Join_InnerArgOuterKeySelectorArgInnerKeySelectorArgResultSelectorArgComparerArg_PetOwnersNamesCasingIsInconsistent_CaseInsensitiveJoinIsPerformed ()
|
|
{
|
|
var persons = Read (Person.CreatePersons ());
|
|
|
|
var pets = new Reader<Pet> (new []
|
|
{
|
|
new Pet {Name = "Barley", Owner = "Peter"},
|
|
new Pet {Name = "Boots", Owner = "Herbert"},
|
|
new Pet {Name = "Whiskers", Owner = "herbert"},
|
|
new Pet {Name = "Daisy", Owner = "Isidor"}
|
|
});
|
|
var result = persons.Join (pets, aPerson => aPerson.FirstName, aPet => aPet.Owner,
|
|
(aPerson, aPet) => new { Owner = aPerson.FirstName, Pet = aPet.Name },
|
|
StringComparer.CurrentCultureIgnoreCase);
|
|
|
|
var e = result.GetEnumerator ();
|
|
|
|
Assert.That (e.MoveNext (), Is.True);
|
|
Assert.That (e.Current.Owner, Is.EqualTo ("Peter"));
|
|
Assert.That (e.Current.Pet, Is.EqualTo ("Barley"));
|
|
|
|
Assert.That (e.MoveNext (), Is.True);
|
|
Assert.That (e.Current.Owner, Is.EqualTo ("Herbert"));
|
|
Assert.That (e.Current.Pet, Is.EqualTo ("Boots"));
|
|
|
|
Assert.That (e.MoveNext (), Is.True);
|
|
Assert.That (e.Current.Owner, Is.EqualTo ("Herbert"));
|
|
Assert.That (e.Current.Pet, Is.EqualTo ("Whiskers"));
|
|
|
|
Assert.That (e.MoveNext (), Is.True);
|
|
Assert.That (e.Current.Owner, Is.EqualTo ("Isidor"));
|
|
Assert.That (e.Current.Pet, Is.EqualTo ("Daisy"));
|
|
|
|
Assert.That (e.MoveNext (), Is.False);
|
|
}
|
|
|
|
[Test]
|
|
public void Last_Integers_ReturnsLastElement ()
|
|
{
|
|
var source = Read (1, 2, 3);
|
|
Assert.That (source.Last (), Is.EqualTo (3));
|
|
}
|
|
|
|
[Test]
|
|
public void Last_IntegerListOptimization_ReturnsLastElementWithoutEnumerating ()
|
|
{
|
|
var source = new NonEnumerableList<int> (new [] { 1, 2, 3 });
|
|
Assert.That (source.Last (), Is.EqualTo (3));
|
|
}
|
|
|
|
[Test]
|
|
[ExpectedException (typeof (InvalidOperationException))]
|
|
public void Last_EmptyIntegerListOptimization_ThrowsInvalidOperationException ()
|
|
{
|
|
new NonEnumerableList<int> ().Last ();
|
|
}
|
|
|
|
[Test]
|
|
[ExpectedException (typeof (ArgumentNullException))]
|
|
public void Last_PredicateArg_NullAsPredicate_ThrowsArgumentNullException ()
|
|
{
|
|
Read<object> ().Last (null);
|
|
}
|
|
|
|
[Test]
|
|
[ExpectedException (typeof (InvalidOperationException))]
|
|
public void Last_PredicateArg_NoMatchingElement_ThrowsInvalidOperationException ()
|
|
{
|
|
var source = Read (1, 2, 3, 4, 5);
|
|
source.Last (i => i > 10);
|
|
}
|
|
|
|
[Test]
|
|
public void Last_PredicateArg_ListOfInts_ReturnsLastMatchingElement ()
|
|
{
|
|
var source = Read (1, 2, 3, 4, 5);
|
|
Assert.That (source.Last (i => i % 2 == 0), Is.EqualTo (4));
|
|
}
|
|
|
|
[Test]
|
|
public void LastOrDefault_EmptySource_ReturnsZero ()
|
|
{
|
|
var source = Read (new int [0]);
|
|
Assert.That (source.LastOrDefault (), Is.EqualTo (0));
|
|
}
|
|
|
|
[Test]
|
|
public void LastOrDefault_NonEmptyList_ReturnsLastElement ()
|
|
{
|
|
var source = Read (1, 2, 3, 4, 5);
|
|
Assert.That (source.LastOrDefault (), Is.EqualTo (5));
|
|
}
|
|
|
|
[Test]
|
|
public void LastOrDefault_PredicateArg_ValidArguments_RetunsLastMatchingElement ()
|
|
{
|
|
var source = Read (1, 2, 3, 4, 5);
|
|
Assert.That (source.LastOrDefault (i => i % 2 == 0), Is.EqualTo (4));
|
|
}
|
|
|
|
[Test]
|
|
public void LastOrDefault_PredicateArg_NoMatchingElement_ReturnsZero ()
|
|
{
|
|
var source = Read (1, 3, 5, 7);
|
|
Assert.That (source.LastOrDefault (i => i % 2 == 0), Is.EqualTo (0));
|
|
}
|
|
|
|
[Test]
|
|
public void LongCount_ValidArgument_ReturnsCorrectNumberOfElements ()
|
|
{
|
|
var source = Read (1, 4, 7, 10);
|
|
Assert.That (source.LongCount (), Is.EqualTo (4));
|
|
}
|
|
|
|
[Test]
|
|
[ExpectedException (typeof (ArgumentNullException))]
|
|
public void LongCount_PredicateArg_NullAsPredicate_ThrowsArgumentNullException ()
|
|
{
|
|
Read<object> ().LongCount (null);
|
|
}
|
|
|
|
[Test]
|
|
public void LongCount_PredicateArg_ValidArguments_ReturnsCorrectNumerOfMatchingElements ()
|
|
{
|
|
var source = Read (1, 2, 3, 4, 5);
|
|
Assert.That (source.LongCount (i => i % 2 == 0), Is.EqualTo (2));
|
|
}
|
|
|
|
[Test]
|
|
[ExpectedException (typeof (InvalidOperationException))]
|
|
public void Max_EmptyList_ThrowsInvalidOperationException ()
|
|
{
|
|
var source = Read (new int [0]);
|
|
source.Max ();
|
|
}
|
|
|
|
[Test]
|
|
public void Max_EmptyNullableIntegerArray_ReturnsNull ()
|
|
{
|
|
Assert.That (Read (new int? [0]).Max (), Is.Null);
|
|
}
|
|
|
|
[Test]
|
|
public void Max_NullableIntegerArrayWithNullsOnly_ReturnsNull ()
|
|
{
|
|
Assert.That (Read<int?> (null, null, null).Max (), Is.Null);
|
|
}
|
|
|
|
[Test]
|
|
public void Max_Integers_ReturnsMaxValue ()
|
|
{
|
|
var source = Read (1000, 203, -9999);
|
|
Assert.That (source.Max (), Is.EqualTo (1000));
|
|
}
|
|
|
|
[Test]
|
|
public void Max_NullableLongs_ReturnsMaxValue ()
|
|
{
|
|
Assert.That (Read<long?> (1L, 2L, 3L, null).Max (), Is.EqualTo (3));
|
|
}
|
|
|
|
[Test]
|
|
public void Max_NullableDoubles_ReturnsMaxValue ()
|
|
{
|
|
Assert.That (Read<double?> (1.0, 2.0, 3.0, null).Max (), Is.EqualTo (3));
|
|
}
|
|
|
|
[Test]
|
|
public void Max_NullableDecimals_ReturnsMaxValue ()
|
|
{
|
|
Assert.That (Read<decimal?> (1m, 2m, 3m, null).Max (), Is.EqualTo (3));
|
|
}
|
|
|
|
[Test]
|
|
public void Max_NullableFloats_ReturnsMaxValue ()
|
|
{
|
|
Assert.That (Read<float?> (-1000F, -100F, -1F, null).Max (), Is.EqualTo (-1));
|
|
}
|
|
|
|
[Test]
|
|
public void Max_ListWithNullableType_ReturnsMaximum ()
|
|
{
|
|
var source = Read<int?> (1, 4, null, 10);
|
|
Assert.That (source.Max (), Is.EqualTo (10));
|
|
}
|
|
|
|
[Test]
|
|
public void Max_NullableList_ReturnsMaxNonNullValue ()
|
|
{
|
|
var source = Read<int?> (-5, -2, null);
|
|
Assert.That (source.Max (), Is.EqualTo (-2));
|
|
}
|
|
|
|
[Test]
|
|
public void Max_SelectorArg_ListOfObjects_ReturnsMaxSelectedValue ()
|
|
{
|
|
var persons = Read (Person.CreatePersons ());
|
|
Assert.That (persons.Max (p => p.Age), Is.EqualTo (24));
|
|
}
|
|
|
|
[Test]
|
|
[ExpectedException (typeof (InvalidOperationException))]
|
|
public void Min_EmptyList_ThrowsInvalidOperationException ()
|
|
{
|
|
var source = Read<int> ();
|
|
source.Min ();
|
|
}
|
|
|
|
[Test]
|
|
public void Min_IntegersWithSomeNull_ReturnsMinimumNonNullValue ()
|
|
{
|
|
var source = Read<int?> (199, 15, null, 30);
|
|
Assert.That (source.Min (), Is.EqualTo (15));
|
|
}
|
|
|
|
[Test]
|
|
public void Min_NullableLongs_ReturnsMinimumNonNullValue ()
|
|
{
|
|
var source = Read<long?> (199L, 15L, null, 30L);
|
|
Assert.That (source.Min (), Is.EqualTo (15));
|
|
}
|
|
|
|
[Test]
|
|
public void Min_NullableFloats_ReturnsMinimumNonNullValue ()
|
|
{
|
|
var source = Read<float?> (1.111F, null, 2.222F); // TODO Improve test data
|
|
Assert.That (source.Min (), Is.EqualTo (1.111F).Within (0.01));
|
|
}
|
|
|
|
[Test]
|
|
public void Min_NullableDoubles_ReturnsMinimumNonNullValue ()
|
|
{
|
|
var source = Read<double?> (1.111, null, 2.222); // TODO Improve test data
|
|
Assert.That (source.Min (), Is.EqualTo (1.111).Within (0.01));
|
|
}
|
|
|
|
[Test]
|
|
public void Min_NullableDecimals_ReturnsMinimumNonNullValue ()
|
|
{
|
|
var source = Read<decimal?> (1.111m, null, 2.222m); // TODO Improve test data
|
|
Assert.That (source.Min (), Is.EqualTo (1.111m).Within (0.01));
|
|
}
|
|
|
|
[Test]
|
|
public void Min_Chars_ReturnsMinimumBySortOrder ()
|
|
{
|
|
Assert.That ("qwertzuioplkjhgfdsayxcvbnm".ToCharArray ().Min (), Is.EqualTo ('a'));
|
|
}
|
|
|
|
[Test]
|
|
public void Min_StringsWithLengthSelector_ReturnsMinimumNonNullStringLength ()
|
|
{
|
|
var strings = Read ("five", "four", null, "three", null, "two", "one", "zero");
|
|
Assert.That (strings.Min (s => s != null ? s.Length : (int?) null), Is.EqualTo (3));
|
|
}
|
|
|
|
[Test]
|
|
public void OfType_EnumerableWithElementsOfDifferentTypes_OnlyDecimalsAreReturned ()
|
|
{
|
|
var source = Read<object> (1, "Hello", 1.234m, new object ());
|
|
var result = source.OfType<decimal> ();
|
|
result.AssertEquals (1.234m);
|
|
}
|
|
|
|
[Test]
|
|
[ExpectedException (typeof (ArgumentNullException))]
|
|
public void OrderBy_KeySelectorArg_NullAsKeySelector_ThrowsArgumentNullException ()
|
|
{
|
|
Read<object> ().OrderBy<object, object> (null);
|
|
}
|
|
|
|
[Test]
|
|
public void OrderBy_KeySelector_ArrayOfPersons_PersonsAreOrderedByAge ()
|
|
{
|
|
var persons = Person.CreatePersons ();
|
|
var reversePersons = (Person []) persons.Clone ();
|
|
Array.Reverse (reversePersons);
|
|
var source = Read (reversePersons);
|
|
var result = source.OrderBy (p => p.Age);
|
|
|
|
var age = 21;
|
|
foreach (var person in result)
|
|
Assert.That (person.Age, Is.EqualTo (age++));
|
|
|
|
Assert.That (age, Is.EqualTo (25));
|
|
}
|
|
|
|
[Test]
|
|
public void OrderBy_KeySelector_DataWithDuplicateKeys_YieldsStablySortedData ()
|
|
{
|
|
var data = new []
|
|
{
|
|
new { Number = 4, Text = "four" },
|
|
new { Number = 4, Text = "quatre" },
|
|
new { Number = 4, Text = "vier" },
|
|
new { Number = 4, Text = "quattro" },
|
|
new { Number = 1, Text = "one" },
|
|
new { Number = 2, Text = "two" },
|
|
new { Number = 2, Text = "deux" },
|
|
new { Number = 3, Text = "three" },
|
|
new { Number = 3, Text = "trois" },
|
|
new { Number = 3, Text = "drei" },
|
|
};
|
|
|
|
var result = Read (data).OrderBy (e => e.Number);
|
|
using (var e = result.GetEnumerator ()) {
|
|
e.MoveNext (); Assert.That (e.Current.Text, Is.EqualTo ("one"));
|
|
e.MoveNext (); Assert.That (e.Current.Text, Is.EqualTo ("two"));
|
|
e.MoveNext (); Assert.That (e.Current.Text, Is.EqualTo ("deux"));
|
|
e.MoveNext (); Assert.That (e.Current.Text, Is.EqualTo ("three"));
|
|
e.MoveNext (); Assert.That (e.Current.Text, Is.EqualTo ("trois"));
|
|
e.MoveNext (); Assert.That (e.Current.Text, Is.EqualTo ("drei"));
|
|
e.MoveNext (); Assert.That (e.Current.Text, Is.EqualTo ("four"));
|
|
e.MoveNext (); Assert.That (e.Current.Text, Is.EqualTo ("quatre"));
|
|
e.MoveNext (); Assert.That (e.Current.Text, Is.EqualTo ("vier"));
|
|
e.MoveNext (); Assert.That (e.Current.Text, Is.EqualTo ("quattro"));
|
|
Assert.That (e.MoveNext (), Is.False);
|
|
}
|
|
}
|
|
|
|
[Test]
|
|
public void ThenBy_KeySelector_DataWithDuplicateKeys_YieldsStablySortedData ()
|
|
{
|
|
var data = new []
|
|
{
|
|
new { Position = 1, LastName = "Smith", FirstName = "John" },
|
|
new { Position = 2, LastName = "Smith", FirstName = "Jack" },
|
|
new { Position = 3, LastName = "Smith", FirstName = "John" },
|
|
new { Position = 4, LastName = "Smith", FirstName = "Jack" },
|
|
new { Position = 5, LastName = "Smith", FirstName = "John" },
|
|
new { Position = 6, LastName = "Smith", FirstName = "Jack" },
|
|
};
|
|
|
|
var result = Read (data).OrderBy (e => e.LastName).ThenBy (e => e.FirstName);
|
|
using (var e = result.GetEnumerator ()) {
|
|
e.MoveNext (); Assert.That (e.Current.Position, Is.EqualTo (2));
|
|
e.MoveNext (); Assert.That (e.Current.Position, Is.EqualTo (4));
|
|
e.MoveNext (); Assert.That (e.Current.Position, Is.EqualTo (6));
|
|
e.MoveNext (); Assert.That (e.Current.Position, Is.EqualTo (1));
|
|
e.MoveNext (); Assert.That (e.Current.Position, Is.EqualTo (3));
|
|
e.MoveNext (); Assert.That (e.Current.Position, Is.EqualTo (5));
|
|
Assert.That (e.MoveNext (), Is.False);
|
|
}
|
|
}
|
|
|
|
[Test]
|
|
[ExpectedException (typeof (ArgumentNullException))]
|
|
public void ThenBy_NullSource_ThrowsArgumentNullException ()
|
|
{
|
|
Enumerable.ThenBy<object, object> (null, delegate { throw new NotImplementedException (); });
|
|
}
|
|
|
|
[Test]
|
|
[ExpectedException (typeof (ArgumentNullException))]
|
|
public void ThenBy_NullKeySelector_ThrowsArgumentNullException ()
|
|
{
|
|
Read<object> ().OrderBy<object, object> (e => { throw new NotImplementedException (); }).ThenBy<object, object> (null);
|
|
}
|
|
|
|
[Test]
|
|
public void ThenByDescending_KeySelectorArgComparerArg_StringArray_CorrectOrdering ()
|
|
{
|
|
var source = Read ("AA", "AB", "AC", "-BA", "-BB", "-BC");
|
|
var result = source.OrderBy (s => s.ToCharArray () [s.ToCharArray ().Length - 1]).ThenByDescending (s => s.Length); /*.AssertEquals("butterfly", "elephant", "dog", "snake", "ape"); */
|
|
result.AssertEquals ("-BA", "AA", "-BB", "AB", "-BC", "AC");
|
|
}
|
|
|
|
class ReverseComparer<T> : IComparer<T> where T : IComparable<T> {
|
|
public int Compare (T x, T y)
|
|
{
|
|
return -1 * x.CompareTo (y);
|
|
}
|
|
}
|
|
|
|
[Test]
|
|
public void OrderBy_KeySelectorArgComparerArg_ArrayOfPersonsAndReversecomparer_PersonsAreOrderedByAgeUsingReversecomparer ()
|
|
{
|
|
var persons = Read (Person.CreatePersons ());
|
|
var result = persons.OrderBy (p => p.Age, new ReverseComparer<int> ());
|
|
var age = 25;
|
|
foreach (var person in result) {
|
|
age--;
|
|
Assert.That (person.Age, Is.EqualTo (age));
|
|
}
|
|
Assert.That (age, Is.EqualTo (21));
|
|
|
|
}
|
|
|
|
[Test]
|
|
public void OrderByDescending_KeySelectorArg_ArrayOfPersons_PersonsAreOrderedByAgeDescending ()
|
|
{
|
|
var persons = Read (Person.CreatePersons ());
|
|
var result = persons.OrderByDescending (p => p.Age);
|
|
int age = 25;
|
|
foreach (var person in result) {
|
|
age--;
|
|
Assert.That (person.Age, Is.EqualTo (age));
|
|
}
|
|
Assert.That (age, Is.EqualTo (21));
|
|
}
|
|
|
|
[Test]
|
|
[ExpectedException (typeof (ArgumentOutOfRangeException))]
|
|
public void Range_ProduceRangeThatLeadsToOverflow_ThrowsArgumentOutOfRangeException ()
|
|
{
|
|
Enumerable.Range (int.MaxValue - 3, 5);
|
|
}
|
|
|
|
[Test]
|
|
[ExpectedException (typeof (ArgumentOutOfRangeException))]
|
|
public void Range_NegativeCount_ThrowsArgumentOutOfRangeException ()
|
|
{
|
|
Enumerable.Range (0, -1);
|
|
}
|
|
|
|
[Test]
|
|
public void Range_Start10Count5_IntsFrom10To14 ()
|
|
{
|
|
var result = Enumerable.Range (10, 5);
|
|
result.AssertEquals (10, 11, 12, 13, 14);
|
|
}
|
|
|
|
[Test]
|
|
[ExpectedException (typeof (ArgumentOutOfRangeException))]
|
|
public void Repeat_PassNegativeCount_ThrowsArgumentOutOfRangeException ()
|
|
{
|
|
Enumerable.Repeat ("Hello World", -2);
|
|
}
|
|
|
|
[Test]
|
|
public void Repeat_StringArgumentCount2_ReturnValueContainsStringArgumentTwice ()
|
|
{
|
|
var result = Enumerable.Repeat ("Hello World", 2);
|
|
result.AssertEquals ("Hello World", "Hello World");
|
|
}
|
|
|
|
[Test]
|
|
public void Reverse_SeriesOfInts_IntsAreCorrectlyReversed ()
|
|
{
|
|
var source = Read (1, 2, 3, 4, 5);
|
|
source.Reverse ().AssertEquals (5, 4, 3, 2, 1);
|
|
}
|
|
|
|
[Test]
|
|
public void Select_ArrayOfPersons_AgeOfPersonsIsSelectedAccordingToPassedLambdaExpression ()
|
|
{
|
|
var persons = Read (Person.CreatePersons ());
|
|
persons.Select (p => p.Age).AssertEquals (21, 22, 23, 24);
|
|
}
|
|
|
|
[Test]
|
|
public void Select_SelectorArg_LambdaThatTakesIndexAsArgument_ReturnValueContainsElementsMultipliedByIndex ()
|
|
{
|
|
var source = Read (0, 1, 2, 3);
|
|
source.Select ((i, index) => i * index).AssertEquals (0, 1, 4, 9);
|
|
}
|
|
|
|
[Test]
|
|
public void SelectMany_SelectorArg_ArrayOfPersons_ReturnsASequenceWithAllLettersOfFirstnames ()
|
|
{
|
|
var persons = Read (Person.CreatePersons ());
|
|
var result = persons.SelectMany (p => p.FirstName.ToCharArray ());
|
|
var check = "PeterHerbertHubertIsidor".ToCharArray ();
|
|
int count = 0; // BUGBUG Collapse loop-based check with array assertion!
|
|
foreach (var c in result) {
|
|
Assert.That (c, Is.EqualTo (check [count]));
|
|
count++;
|
|
}
|
|
}
|
|
|
|
class PetOwner {
|
|
public string Name { get; set; }
|
|
public IList<string> Pets { get; set; }
|
|
}
|
|
|
|
[Test]
|
|
public void SelectMany_Selector3Arg_ArrayOfPetOwners_SelectorUsesElementIndexArgument ()
|
|
{
|
|
var petOwners = Read (new [] {
|
|
new PetOwner { Name = "Higa, Sidney", Pets = new[] { "Scruffy", "Sam" } },
|
|
new PetOwner { Name = "Ashkenazi, Ronen", Pets = new[] { "Walker", "Sugar" } },
|
|
new PetOwner { Name = "Price, Vernette", Pets = new[] { "Scratches", "Diesel" } },
|
|
new PetOwner { Name = "Hines, Patrick", Pets = new[] { "Dusty" } } });
|
|
|
|
var result = petOwners.SelectMany ((po, index) => po.Pets.Select (pet => index + pet));
|
|
|
|
result.AssertEquals ("0Scruffy", "0Sam", "1Walker", "1Sugar", "2Scratches", "2Diesel", "3Dusty");
|
|
}
|
|
|
|
[Test]
|
|
public void SelectMany_CollectionSelectorArgResultSelectorArg_ArrayOfPetOwner_ResultContainsElementForEachPetAPetOwnerHas ()
|
|
{
|
|
var petOwners = Read (new [] {
|
|
new PetOwner { Name = "Higa", Pets = new[] { "Scruffy", "Sam" } },
|
|
new PetOwner { Name = "Ashkenazi", Pets = new[] { "Walker", "Sugar" } },
|
|
new PetOwner { Name = "Price", Pets = new[] { "Scratches", "Diesel" } },
|
|
new PetOwner { Name = "Hines", Pets = new[] { "Dusty" } } });
|
|
|
|
var result = petOwners.SelectMany (po => po.Pets, (po, pet) => po.Name + "+" + pet);
|
|
|
|
result.AssertEquals (
|
|
"Higa+Scruffy", "Higa+Sam",
|
|
"Ashkenazi+Walker", "Ashkenazi+Sugar",
|
|
"Price+Scratches", "Price+Diesel",
|
|
"Hines+Dusty");
|
|
}
|
|
|
|
[Test]
|
|
[ExpectedException (typeof (ArgumentNullException))]
|
|
public void SequenceEqual_NullFirstSequence_ThrowsArgumentNullException ()
|
|
{
|
|
Enumerable.SequenceEqual (null, Read<object> ());
|
|
}
|
|
|
|
[Test]
|
|
[ExpectedException (typeof (ArgumentNullException))]
|
|
public void SequenceEqual_NullSecondSequence_ThrowsArgumentNullException ()
|
|
{
|
|
Read<object> ().SequenceEqual (null);
|
|
}
|
|
|
|
[Test]
|
|
public void SequenceEqual_EqualSequences_ReturnsTrue ()
|
|
{
|
|
var source = Read (1, 2, 3);
|
|
var argument = Read (1, 2, 3);
|
|
Assert.That (source.SequenceEqual (argument), Is.True);
|
|
}
|
|
|
|
[Test]
|
|
public void SequenceEqual_DifferentSequences_ReturnsFalse ()
|
|
{
|
|
var source = Read (1, 2, 3);
|
|
var argument = Read (1, 3, 2);
|
|
Assert.That (source.SequenceEqual (argument), Is.False);
|
|
}
|
|
|
|
[Test]
|
|
public void SequenceEqual_LongerSecondSequence_ReturnsFalse ()
|
|
{
|
|
var source = Read (1, 2, 3);
|
|
var argument = Read (1, 2, 3, 4);
|
|
Assert.That (source.SequenceEqual (argument), Is.False);
|
|
}
|
|
|
|
[Test]
|
|
public void SequenceEqual_ShorterSecondSequence_ReturnsFalse ()
|
|
{
|
|
var first = Read (1, 2, 3, 4);
|
|
var second = Read (1, 2, 3);
|
|
Assert.That (first.SequenceEqual (second), Is.False);
|
|
}
|
|
|
|
[Test]
|
|
public void SequenceEqual_FloatsWithTolerantComparer_ComparerIsUsed ()
|
|
{
|
|
var source = Read (1F, 2F, 3F);
|
|
var argument = Read (1.03F, 1.99F, 3.02F);
|
|
Assert.That (source.SequenceEqual (argument, new FloatComparer ()), Is.True);
|
|
}
|
|
|
|
private sealed class FloatComparer : IEqualityComparer<float> {
|
|
public bool Equals (float x, float y)
|
|
{
|
|
return Math.Abs (x - y) < 0.1f;
|
|
}
|
|
public int GetHashCode (float x)
|
|
{
|
|
throw new NotImplementedException ();
|
|
}
|
|
}
|
|
|
|
[Test]
|
|
[ExpectedException (typeof (InvalidOperationException))]
|
|
public void Single_EmptySource_ThrowsInvalidOperationException ()
|
|
{
|
|
var source = Read<int> ();
|
|
source.Single ();
|
|
}
|
|
|
|
[Test]
|
|
[ExpectedException (typeof (InvalidOperationException))]
|
|
public void Single_SourceWithMoreThanOneElement_ThrowsInvalidOperationException ()
|
|
{
|
|
var source = Read (3, 6);
|
|
source.Single ();
|
|
}
|
|
|
|
[Test]
|
|
public void Single_SourceWithOneElement_ReturnsSingleElement ()
|
|
{
|
|
var source = Read (1);
|
|
Assert.That (source.Single (), Is.EqualTo (1));
|
|
}
|
|
|
|
[Test]
|
|
[ExpectedException (typeof (ArgumentNullException))]
|
|
public void Single_PredicateArg_PassNullAsPredicate_ThrowsArgumentNullException ()
|
|
{
|
|
Read<object> ().Single (null);
|
|
}
|
|
|
|
[Test]
|
|
[ExpectedException (typeof (InvalidOperationException))]
|
|
public void Single_PredicateArg_NoElementSatisfiesCondition_ThrowsInvalidOperationException ()
|
|
{
|
|
var source = Read (1, 3, 5);
|
|
source.Single (i => i % 2 == 0);
|
|
}
|
|
|
|
[Test]
|
|
[ExpectedException (typeof (InvalidOperationException))]
|
|
public void Single_PredicateArg_MoreThanOneElementSatisfiedCondition_ThrowsInvalidOperationException ()
|
|
{
|
|
var source = Read (1, 2, 3, 4);
|
|
source.Single (i => i % 2 == 0);
|
|
}
|
|
|
|
[Test]
|
|
[ExpectedException (typeof (InvalidOperationException))]
|
|
public void Single_PredicateArg_SourceIsEmpty_ThrowsInvalidOperationException ()
|
|
{
|
|
var source = Read<int> ();
|
|
source.Single (i => i % 2 == 0);
|
|
}
|
|
|
|
[Test]
|
|
public void Single_PredicateArg_ArrayOfIntWithOnlyOneElementSatisfyingCondition_ReturnsOnlyThisElement ()
|
|
{
|
|
var source = Read (1, 2, 3);
|
|
Assert.That (source.Single (i => i % 2 == 0), Is.EqualTo (2));
|
|
}
|
|
|
|
[Test]
|
|
[ExpectedException (typeof (InvalidOperationException))]
|
|
public void SingleOrDefault_MoreThanOneElementInSource_ThrowsInvalidOperationException ()
|
|
{
|
|
var source = Read (1, 2, 3);
|
|
source.SingleOrDefault ();
|
|
}
|
|
|
|
[Test]
|
|
public void SingleOrDefault_EmptySource_ReturnsZero ()
|
|
{
|
|
var source = Read<int> ();
|
|
Assert.That (source.SingleOrDefault (), Is.EqualTo (0));
|
|
}
|
|
|
|
[Test]
|
|
public void SingleOrDefault_SourceWithOneElement_ReturnsSingleElement ()
|
|
{
|
|
var source = Read (5);
|
|
Assert.That (source.SingleOrDefault (), Is.EqualTo (5));
|
|
}
|
|
|
|
[Test]
|
|
[ExpectedException (typeof (ArgumentNullException))]
|
|
public void SingleOrDefault_PredicateArg_PassNullAsPredicate_ThrowsArgumentNullException ()
|
|
{
|
|
Read<object> ().SingleOrDefault (null);
|
|
}
|
|
|
|
[Test]
|
|
public void SingleOrDefault_PredicateArg_EmptySource_ReturnsZero ()
|
|
{
|
|
var source = Read<int> ();
|
|
Assert.That (source.SingleOrDefault (i => i % 2 == 0), Is.EqualTo (0));
|
|
}
|
|
|
|
[Test]
|
|
[ExpectedException (typeof (InvalidOperationException))]
|
|
public void SingleOrDefault_PredicateArg_MoreThanOneElementSatisfiesCondition_ThrowsInvalidOperationException ()
|
|
{
|
|
var source = Read (1, 2, 3, 4, 5);
|
|
source.SingleOrDefault (i => i % 2 == 0);
|
|
}
|
|
|
|
[Test]
|
|
public void SingleOrDefault_PredicateArg_NoElementSatisfiesCondition_ReturnsZero ()
|
|
{
|
|
var source = Read (1, 3, 5);
|
|
Assert.That (source.SingleOrDefault (i => i % 2 == 0), Is.EqualTo (0));
|
|
}
|
|
|
|
[Test]
|
|
public void SingleOrDefault_PredicateArg_OneElementSatisfiesCondition_ReturnsCorrectElement ()
|
|
{
|
|
var source = Read (1, 2, 3);
|
|
Assert.That (source.SingleOrDefault (i => i % 2 == 0), Is.EqualTo (2));
|
|
}
|
|
|
|
[Test]
|
|
public void Skip_IntsFromOneToTenAndFifeAsSecondArg_IntsFromSixToTen ()
|
|
{
|
|
var source = Read (1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
|
|
source.Skip (5).AssertEquals (6, 7, 8, 9, 10);
|
|
}
|
|
|
|
[Test]
|
|
public void Skip_PassNegativeValueAsCount_SameBehaviorAsMicrosoftImplementation ()
|
|
{
|
|
var source = Read (1, 2, 3, 4, 5);
|
|
source.Skip (-5).AssertEquals (1, 2, 3, 4, 5);
|
|
}
|
|
|
|
[Test]
|
|
[ExpectedException (typeof (ArgumentNullException))]
|
|
public void SkipWhile_PredicateArg_PassNullAsPredicate_ThrowsArgumentNullException ()
|
|
{
|
|
Read<object> ().SkipWhile ((Func<object, bool>) null);
|
|
}
|
|
|
|
[Test]
|
|
public void SkipWhile_PredicateArg_IntsFromOneToFive_ElementsAreSkippedAsLongAsConditionIsSatisfied ()
|
|
{
|
|
var source = Read (1, 2, 3, 4, 5);
|
|
source.SkipWhile (i => i < 3).AssertEquals (3, 4, 5);
|
|
}
|
|
|
|
[Test]
|
|
public void SkipWhile_PredicateArg_ArrayOfIntsWithElementsNotSatisfyingConditionAtTheEnd_IntsAtTheEndArePartOfResult ()
|
|
{
|
|
var source = Read (1, 2, 3, 4, 5, 1, 2, 3);
|
|
source.SkipWhile (i => i < 3).AssertEquals (3, 4, 5, 1, 2, 3);
|
|
}
|
|
|
|
[Test]
|
|
public void SkipWhile_PredicateArg_PredicateAlwaysTrue_EmptyResult ()
|
|
{
|
|
var source = Read (1, 2, 3);
|
|
var result = source.SkipWhile (i => true);
|
|
Assert.That (result.GetEnumerator ().MoveNext (), Is.False);
|
|
}
|
|
|
|
[Test]
|
|
public void SkipWhile_Predicate3Arg_IntsFromOneToNine_ElementsAreSkippedWhileIndexLessThanFive ()
|
|
{
|
|
var source = Read (1, 2, 3, 4, 5, 6, 7, 8, 9);
|
|
source.SkipWhile ((i, index) => index < 5).AssertEquals (6, 7, 8, 9);
|
|
}
|
|
|
|
[Test]
|
|
[ExpectedException (typeof (OverflowException))]
|
|
public void Sum_SumOfArgumentsCausesOverflow_ThrowsOverflowException ()
|
|
{
|
|
var source = Read (int.MaxValue - 1, 2);
|
|
source.Sum ();
|
|
}
|
|
|
|
[Test]
|
|
public void Sum_IntsFromOneToTen_ResultIsFiftyFive ()
|
|
{
|
|
var source = Read (1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
|
|
Assert.That (source.Sum (), Is.EqualTo (55));
|
|
}
|
|
|
|
[Test]
|
|
public void Sum_Longs_ReturnsSum ()
|
|
{
|
|
Assert.That (Read (1L, 2L, 3L).Sum (), Is.EqualTo (6));
|
|
}
|
|
|
|
[Test]
|
|
public void Sum_SelectorArg_Longs_ReturnsSum ()
|
|
{
|
|
Assert.That (Read (123L, 456L, 789L).Sum (n => n * 2L), Is.EqualTo (2736L));
|
|
}
|
|
|
|
[Test]
|
|
public void Sum_SelectorArg_NullableLongsWithSomeNulls_ReturnsSum ()
|
|
{
|
|
Assert.That (Read<long?> (123L, null, 456L, null, 789L).Sum (n => n * 2L), Is.EqualTo (2736L));
|
|
}
|
|
|
|
[Test]
|
|
public void Sum_Floats_ReturnsSum ()
|
|
{
|
|
Assert.That (Read (1F, 2F, 3F).Sum (), Is.EqualTo (6));
|
|
}
|
|
|
|
[Test]
|
|
public void Sum_SelectorArg_Floats_ReturnsSum ()
|
|
{
|
|
Assert.That (Read (123.4F, 567.8F, 91011.12F).Sum (n => n * 2.5F), Is.EqualTo (229255.8F));
|
|
}
|
|
|
|
[Test]
|
|
public void Sum_NullableFloats_ReturnsSum ()
|
|
{
|
|
Assert.That (Read<float?> (1F, 2F, 3F, null).Sum (), Is.EqualTo (6));
|
|
}
|
|
|
|
[Test]
|
|
public void Sum_SelectorArg_NullableFloatsWithSomeNulls_ReturnsSum ()
|
|
{
|
|
Assert.That (Read<float?> (123.4F, null, 567.8F, null, 91011.12F).Sum (n => n * 2.5F), Is.EqualTo (229255.8F));
|
|
}
|
|
|
|
[Test]
|
|
public void Sum_Doubles_ReturnsSum ()
|
|
{
|
|
Assert.That (Read (1.0, 2.0, 3.0).Sum (), Is.EqualTo (6));
|
|
}
|
|
|
|
[Test]
|
|
public void Sum_SelectorArg_Doubles_ReturnsSum ()
|
|
{
|
|
Assert.That (Read (123.4, 567.8, 91011.12).Sum (n => n * 2.5), Is.EqualTo (229255.8));
|
|
}
|
|
|
|
[Test]
|
|
public void Sum_NullableDoubles_ReturnsSum ()
|
|
{
|
|
Assert.That (Read<double?> (1.0, 2.0, 3.0, null).Sum (), Is.EqualTo (6)); // TODO Improve test data
|
|
}
|
|
|
|
[Test]
|
|
public void Sum_SelectorArg_NullableDoublesWithSomeNulls_ReturnsSum ()
|
|
{
|
|
Assert.That (Read<double?> (123.4, null, 567.8, null, 91011.12).Sum (n => n * 2.5), Is.EqualTo (229255.8));
|
|
}
|
|
|
|
[Test]
|
|
public void Sum_Decimals_ReturnsSum ()
|
|
{
|
|
Assert.That (Read (1m, 2m, 3m).Sum (), Is.EqualTo (6));
|
|
}
|
|
|
|
[Test]
|
|
public void Sum_SelectorArg_Decimals_ReturnsSum ()
|
|
{
|
|
Assert.That (Read (123.4m, 567.8m, 91011.12m).Sum (n => n * 2.5m), Is.EqualTo (229255.8m));
|
|
}
|
|
|
|
[Test]
|
|
public void Sum_NullableDecimals_ReturnsSum ()
|
|
{
|
|
Assert.That (Read<decimal?> (1m, 2m, 3m, null).Sum (), Is.EqualTo (6)); // TODO Improve test data
|
|
}
|
|
|
|
[Test]
|
|
public void Sum_SelectorArg_NullableDecimalsWithSomeNulls_ReturnsSum ()
|
|
{
|
|
Assert.That (Read<decimal?> (123.4m, null, 567.8m, null, 91011.12m).Sum (n => n * 2.5m), Is.EqualTo (229255.8m));
|
|
}
|
|
|
|
[Test]
|
|
public void Sum_NullableLongs_ReturnsSum ()
|
|
{
|
|
Assert.That (Read<long?> (1L, 2L, 3L, null).Sum (), Is.EqualTo (6)); // TODO Improve test data
|
|
}
|
|
|
|
[Test]
|
|
public void Sum_NullableIntsAsArguments_ReturnsCorrectSum () // TODO Improve test data
|
|
{
|
|
var source = Read<int?> (1, 2, null);
|
|
Assert.That (source.Sum (), Is.EqualTo (3));
|
|
}
|
|
|
|
[Test]
|
|
public void Sum_SelectorArgNullableIntegersWithSomeNulls_ReturnsSum ()
|
|
{
|
|
var source = Read<int?> (123, null, 456, null, 789);
|
|
Assert.That (source.Sum (n => n * 2), Is.EqualTo (2736));
|
|
}
|
|
|
|
[Test]
|
|
public void Sum_SelectorArg_StringArray_ResultIsSumOfStringLengths ()
|
|
{
|
|
var source = Read ("dog", "cat", "eagle");
|
|
Assert.That (source.Sum (s => s.Length), Is.EqualTo (11));
|
|
}
|
|
|
|
[Test]
|
|
public void Take_IntsFromOneToSixAndThreeAsCount_IntsFromOneToThreeAreReturned ()
|
|
{
|
|
var source = Read (1, 2, 3, 4, 5, 6);
|
|
source.Take (3).AssertEquals (1, 2, 3);
|
|
}
|
|
|
|
[Test]
|
|
public void Take_CountBiggerThanList_ReturnsAllElements ()
|
|
{
|
|
var source = Read (1, 2, 3, 4, 5);
|
|
source.Take (10).AssertEquals (1, 2, 3, 4, 5);
|
|
}
|
|
|
|
[Test]
|
|
[ExpectedException (typeof (ArgumentNullException))]
|
|
public void TakeWhile_PassNullAsPredicate_ThrowsArgumentNullException ()
|
|
{
|
|
new object [0].TakeWhile ((Func<object, bool>) null);
|
|
}
|
|
|
|
[Test]
|
|
public void TakeWhile_IntsFromOneToTenAndConditionThatSquareIsSmallerThan50_IntsFromOneToSeven ()
|
|
{
|
|
var source = Read (1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
|
|
source.TakeWhile (i => i * i < 50).AssertEquals (1, 2, 3, 4, 5, 6, 7);
|
|
}
|
|
|
|
[Test]
|
|
public void ToArray_IntsFromOneToTen_ResultIsIntArrayContainingAllElements ()
|
|
{
|
|
var source = Read (1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
|
|
var result = source.ToArray ();
|
|
Assert.That (result, Is.TypeOf (typeof (int [])));
|
|
result.AssertEquals (1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
|
|
}
|
|
|
|
[Test]
|
|
[ExpectedException (typeof (ArgumentNullException))]
|
|
public void ToDictionary_KeySelectorArg_KeySelectorYieldsNull_ThrowsArgumentNullException ()
|
|
{
|
|
var source = new [] { "eagle", "deer" };
|
|
source.ToDictionary<string, string> (s => null);
|
|
}
|
|
|
|
[Test]
|
|
[ExpectedException (typeof (ArgumentException))]
|
|
public void ToDictionary_KeySelectorArg_DuplicateKeys_ThrowsArgumentException ()
|
|
{
|
|
var source = new [] { "eagle", "deer", "cat", "dog" };
|
|
source.ToDictionary (s => s.Length);
|
|
}
|
|
|
|
[Test]
|
|
public void ToDictionary_KeySelectorArg_ValidArguments_KeySelectorIsUsedForKeysInDictionary ()
|
|
{
|
|
var source = Read ("1", "2", "3");
|
|
var result = source.ToDictionary (s => int.Parse (s));
|
|
int check = 1;
|
|
foreach (var pair in result) {
|
|
Assert.That (pair.Key, Is.EqualTo (check));
|
|
Assert.That (pair.Value, Is.EqualTo (check.ToString ()));
|
|
check++;
|
|
}
|
|
Assert.That (check, Is.EqualTo (4));
|
|
}
|
|
|
|
[Test]
|
|
public void ToDictionary_KeySelectorArgElementSelectorArg_IntsFromOneToTen_KeySelectorAndElementSelectorAreUsedForDictionaryElements ()
|
|
{
|
|
var source = Read (1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
|
|
var result = source.ToDictionary (i => i.ToString (), i => Math.Sqrt (double.Parse (i.ToString ())));
|
|
int check = 1;
|
|
foreach (var pair in result) {
|
|
Assert.That (pair.Key, Is.EqualTo (check.ToString ()));
|
|
Assert.That (pair.Value, Is.EqualTo (Math.Sqrt (double.Parse (check.ToString ()))).Within (0.00001));
|
|
check++;
|
|
}
|
|
}
|
|
|
|
[Test]
|
|
public void ToList_IntsFromOneToTen_ReturnsListOfIntsContainingAllElements ()
|
|
{
|
|
var source = Read (1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
|
|
var result = source.ToList ();
|
|
Assert.That (result, Is.TypeOf (typeof (List<int>)));
|
|
result.AssertEquals (1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
|
|
}
|
|
|
|
[Test]
|
|
public void ToLookup_KeySelectorArg_Strings_StringsByLength ()
|
|
{
|
|
var source = Read ("eagle", "dog", "cat", "bird", "camel");
|
|
var lookup = source.ToLookup (s => s.Length);
|
|
|
|
Assert.That (lookup.Count, Is.EqualTo (3));
|
|
|
|
Assert.That (lookup.Contains (3), Is.True);
|
|
lookup [3].AssertEquals ("dog", "cat");
|
|
|
|
Assert.That (lookup.Contains (4), Is.True);
|
|
lookup [4].AssertEquals ("bird");
|
|
|
|
Assert.That (lookup.Contains (5), Is.True);
|
|
lookup [5].AssertEquals ("eagle", "camel");
|
|
}
|
|
|
|
[Test]
|
|
public void ToLookup_KeySelectorArgElementSelectorArg_Strings_ProjecetedStringsByLength ()
|
|
{
|
|
var source = Read ("eagle", "dog", "cat", "bird", "camel");
|
|
var lookup = source.ToLookup (s => s.Length, str => str.ToUpperInvariant ());
|
|
|
|
Assert.That (lookup.Count, Is.EqualTo (3));
|
|
|
|
Assert.That (lookup.Contains (3), Is.True);
|
|
var e = lookup [3].GetEnumerator ();
|
|
e.MoveNext (); Assert.That (e.Current, Is.EqualTo ("DOG"));
|
|
e.MoveNext (); Assert.That (e.Current, Is.EqualTo ("CAT"));
|
|
Assert.That (e.MoveNext (), Is.False);
|
|
|
|
Assert.That (lookup.Contains (4), Is.True);
|
|
e = lookup [4].GetEnumerator ();
|
|
e.MoveNext (); Assert.That (e.Current, Is.EqualTo ("BIRD"));
|
|
Assert.That (e.MoveNext (), Is.False);
|
|
|
|
Assert.That (lookup.Contains (5), Is.True);
|
|
e = lookup [5].GetEnumerator ();
|
|
e.MoveNext (); Assert.That (e.Current, Is.EqualTo ("EAGLE"));
|
|
e.MoveNext (); Assert.That (e.Current, Is.EqualTo ("CAMEL"));
|
|
Assert.That (e.MoveNext (), Is.False);
|
|
}
|
|
|
|
[Test]
|
|
[ExpectedException (typeof (ArgumentNullException))]
|
|
public void Union_SecondArg_PassNullAsArgument_ThrowsArgumentNullException ()
|
|
{
|
|
Read<object> ().Union (null);
|
|
}
|
|
|
|
[Test]
|
|
public void Union_SecondArg_ValidIntArguments_NoDuplicatesAndInSourceOrder ()
|
|
{
|
|
var source = Read (5, 3, 9, 7, 5, 9, 3, 7);
|
|
var argument = Read (8, 3, 6, 4, 4, 9, 1, 0);
|
|
source.Union (argument).AssertEquals (5, 3, 9, 7, 8, 6, 4, 1, 0);
|
|
}
|
|
|
|
[Test]
|
|
public void Union_SecondArgComparerArg_UpperCaseAndLowerCaseStrings_PassedComparerIsUsed ()
|
|
{
|
|
var source = Read ("A", "B", "C", "D", "E", "F");
|
|
var argument = Read ("a", "b", "c", "d", "e", "f");
|
|
source.Union (argument, StringComparer.CurrentCultureIgnoreCase).AssertEquals ("A", "B", "C", "D", "E", "F");
|
|
}
|
|
|
|
[Test]
|
|
[ExpectedException (typeof (ArgumentNullException))]
|
|
public void Where_NullPredicate_ThrowsArgumentNullException ()
|
|
{
|
|
Read<object> ().Where ((Func<object, bool>) null);
|
|
}
|
|
|
|
[Test]
|
|
public void Where_IntegersWithEvensPredicate_YieldsEvenIntegers ()
|
|
{
|
|
var source = Read (1, 2, 3, 4, 5);
|
|
source.Where (i => i % 2 == 0).AssertEquals (2, 4);
|
|
}
|
|
|
|
[Test]
|
|
public void Where_StringsWithEvenIndexPredicate_YieldsElementsWithEvenIndex ()
|
|
{
|
|
var source = Read ("Camel", "Marlboro", "Parisienne", "Lucky Strike");
|
|
source.Where ((s, i) => i % 2 == 0).AssertEquals ("Camel", "Parisienne");
|
|
}
|
|
|
|
[Test]
|
|
public void AsEnumerable_NonNullSource_ReturnsSourceReference ()
|
|
{
|
|
var source = new object [0];
|
|
Assert.That (Enumerable.AsEnumerable (source), Is.SameAs (source));
|
|
}
|
|
|
|
[Test]
|
|
public void AsEnumerable_NullSource_ReturnsNull ()
|
|
{
|
|
Assert.That (Enumerable.AsEnumerable<object> (null), Is.Null);
|
|
}
|
|
|
|
[Test]
|
|
[ExpectedException (typeof (ArgumentNullException))]
|
|
public void Zip_FirstSourceNull_ThrowsArgumentNullException ()
|
|
{
|
|
Enumerable.Zip<object, object, object> (null, new object [0], null);
|
|
}
|
|
|
|
[Test]
|
|
[ExpectedException (typeof (ArgumentNullException))]
|
|
public void Zip_SecondSourceNull_ThrowsArgumentNullException ()
|
|
{
|
|
new object [0].Zip<object, object, object> (null, null);
|
|
}
|
|
|
|
[Test]
|
|
[ExpectedException (typeof (ArgumentNullException))]
|
|
public void Zip_ResultNull_ThrowsArgumentNullException ()
|
|
{
|
|
new object [0].Zip<object, object, object> (new object [0], null);
|
|
}
|
|
|
|
[Test]
|
|
public void Zip ()
|
|
{
|
|
var a = new [] { 'a', 'b', 'c' };
|
|
var b = new [] { 1, 2, 3 };
|
|
a.Zip (b, (f, s) => f + s.ToString ()).AssertEquals ("a1", "b2", "c3");
|
|
|
|
a = new [] { 'a' };
|
|
b = new [] { 100, 200, 300 };
|
|
a.Zip (b, (f, s) => f + s.ToString ()).AssertEquals ("a100");
|
|
}
|
|
|
|
|
|
private Reader<T> Read<T> (params T [] source)
|
|
{
|
|
Debug.Assert (source != null);
|
|
|
|
var reader = new Reader<T> (source);
|
|
|
|
//
|
|
// If the calling test method is not expecting an exception
|
|
// then check that the source enumerator will be disposed
|
|
// by the time the test is torn.
|
|
//
|
|
|
|
var disposed = false;
|
|
var enumerated = false;
|
|
reader.Disposed += delegate { disposed = true; };
|
|
reader.Enumerated += delegate { enumerated = true; };
|
|
AssertionHandler assertion = () => Assert.That (!enumerated || disposed, Is.True, "Enumerator not disposed.");
|
|
tearDownAssertions = (AssertionHandler) Delegate.Combine (tearDownAssertions, assertion);
|
|
|
|
return reader;
|
|
}
|
|
}
|
|
|
|
[Serializable]
|
|
internal sealed class NonEnumerableList<T> : List<T>, IEnumerable<T> {
|
|
public NonEnumerableList () { }
|
|
|
|
public NonEnumerableList (IEnumerable<T> collection) :
|
|
base (collection) { }
|
|
|
|
// Re-implement GetEnumerator to be undefined.
|
|
|
|
IEnumerator<T> IEnumerable<T>.GetEnumerator ()
|
|
{
|
|
throw new NotImplementedException ();
|
|
}
|
|
|
|
IEnumerator IEnumerable.GetEnumerator ()
|
|
{
|
|
return ((IEnumerable<T>) this).GetEnumerator ();
|
|
}
|
|
}
|
|
|
|
[Serializable]
|
|
internal sealed class NonEnumerableReadOnlyList<T> : ReadOnlyCollection<T>, IEnumerable<T> {
|
|
public NonEnumerableReadOnlyList () :
|
|
this (new List<T>()) { }
|
|
|
|
public NonEnumerableReadOnlyList (IList<T> collection) :
|
|
base (collection) { }
|
|
|
|
// Re-implement GetEnumerator to be undefined.
|
|
|
|
IEnumerator<T> IEnumerable<T>.GetEnumerator ()
|
|
{
|
|
throw new NotImplementedException ();
|
|
}
|
|
|
|
IEnumerator IEnumerable.GetEnumerator()
|
|
{
|
|
return ((IEnumerable<T>) this).GetEnumerator();
|
|
}
|
|
}
|
|
|
|
internal sealed class Reader<T> : IEnumerable<T>, IEnumerator<T>
|
|
{
|
|
public event EventHandler Disposed;
|
|
public event EventHandler Enumerated;
|
|
|
|
private IEnumerable<T> source;
|
|
private IEnumerator<T> cursor;
|
|
|
|
public Reader(IEnumerable<T> values)
|
|
{
|
|
Debug.Assert(values != null);
|
|
source = values;
|
|
}
|
|
|
|
private IEnumerator<T> Enumerator
|
|
{
|
|
get
|
|
{
|
|
if (cursor == null)
|
|
GetEnumerator();
|
|
return this;
|
|
}
|
|
}
|
|
|
|
public object EOF
|
|
{
|
|
get { return Enumerator.MoveNext(); }
|
|
}
|
|
|
|
public IEnumerator<T> GetEnumerator()
|
|
{
|
|
if (source == null) throw new Exception("A LINQ Operator called GetEnumerator() twice.");
|
|
cursor = source.GetEnumerator();
|
|
source = null;
|
|
|
|
var handler = Enumerated;
|
|
if (handler != null)
|
|
handler(this, EventArgs.Empty);
|
|
|
|
return this;
|
|
}
|
|
|
|
IEnumerator IEnumerable.GetEnumerator()
|
|
{
|
|
return GetEnumerator();
|
|
}
|
|
|
|
public T Read()
|
|
{
|
|
if (!Enumerator.MoveNext())
|
|
throw new InvalidOperationException("No more elements in the source sequence.");
|
|
return Enumerator.Current;
|
|
}
|
|
|
|
void IDisposable.Dispose()
|
|
{
|
|
source = null;
|
|
var e = cursor;
|
|
cursor = null;
|
|
|
|
if (e != null)
|
|
{
|
|
e.Dispose();
|
|
|
|
var handler = Disposed;
|
|
if (handler != null)
|
|
handler(this, EventArgs.Empty);
|
|
}
|
|
}
|
|
|
|
private IEnumerator<T> GetSourceEnumerator()
|
|
{
|
|
if (source != null && cursor == null)
|
|
throw new InvalidOperationException(/* GetEnumerator not called yet */);
|
|
if (source == null && cursor == null)
|
|
throw new ObjectDisposedException(GetType().FullName);
|
|
|
|
return cursor;
|
|
}
|
|
|
|
bool IEnumerator.MoveNext()
|
|
{
|
|
return GetSourceEnumerator().MoveNext();
|
|
}
|
|
|
|
void IEnumerator.Reset()
|
|
{
|
|
GetSourceEnumerator().Reset();
|
|
}
|
|
|
|
T IEnumerator<T>.Current
|
|
{
|
|
get { return GetSourceEnumerator().Current; }
|
|
}
|
|
|
|
object IEnumerator.Current
|
|
{
|
|
get { return ((IEnumerator<T>) this).Current; }
|
|
}
|
|
}
|
|
|
|
internal static class ReaderTestExtensions
|
|
{
|
|
public static void AssertEnded<T>(this Reader<T> reader)
|
|
{
|
|
Debug.Assert(reader != null);
|
|
|
|
Assert.That(reader.EOF, Is.False, "Too many elements in source.");
|
|
}
|
|
|
|
public static Reader<T> AssertNext<T>(this Reader<T> reader, Constraint constraint)
|
|
{
|
|
Debug.Assert(reader != null);
|
|
Debug.Assert(constraint != null);
|
|
|
|
Assert.That(reader.Read(), constraint);
|
|
return reader;
|
|
}
|
|
}
|
|
|
|
internal static class Tester {
|
|
|
|
public static void AssertEquals<T> (this IEnumerable<T> actuals, params T [] expectations)
|
|
{
|
|
actuals.AssertThat (a => Is.EqualTo (a), expectations);
|
|
}
|
|
|
|
public static void AssertThat<T> (this IEnumerable<T> actuals, Func<T, Constraint> constrainer, params T [] expectations)
|
|
{
|
|
using (var e = actuals.GetEnumerator ()) {
|
|
foreach (var expected in expectations) {
|
|
e.MoveNext ();
|
|
Assert.That (e.Current, constrainer (expected));
|
|
}
|
|
|
|
Assert.That (e.MoveNext (), Is.False);
|
|
}
|
|
}
|
|
}
|
|
}
|