Jo Shields a575963da9 Imported Upstream version 3.6.0
Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14
2014-08-13 10:39:27 +01:00

136 lines
3.7 KiB
C#

//
// LookupTest.cs
//
// Author:
// Jb Evain (jbevain@novell.com)
//
// (C) 2009 Novell, Inc. (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System;
using System.Collections.Generic;
using System.Linq;
using NUnit.Framework;
namespace MonoTests.System.Linq {
[TestFixture]
public class LookupTest {
class Color {
public string Name { get; set; }
public int Value { get; set; }
public Color (string name, int value)
{
Name = name;
Value = value;
}
}
static IEnumerable<Color> GetColors ()
{
yield return new Color ("Red", 0xff0000);
yield return new Color ("Green", 0x00ff00);
yield return new Color ("Blue", 0x0000ff);
}
[Test]
public void LookupIgnoreCase ()
{
var lookup = GetColors ().ToLookup (
c => c.Name,
c => c.Value,
StringComparer.OrdinalIgnoreCase);
Assert.AreEqual (0xff0000, lookup ["red"].First ());
Assert.AreEqual (0x00ff00, lookup ["GrEeN"].First ());
Assert.AreEqual (0x0000ff, lookup ["Blue"].First ());
}
[Test]
public void LookupContains()
{
var lookup = new [] { "hi", "bye" }.ToLookup (c => c [0].ToString ());
Assert.IsTrue (lookup.Contains ("h"));
Assert.IsFalse (lookup.Contains ("d"));
Assert.IsFalse (lookup.Contains (null));
}
[Test]
public void LookupContainsNull()
{
var lookup = new [] { "hi", "bye", "42" }.ToLookup (c => (Char.IsNumber (c [0]) ? null : c [0].ToString ()));
Assert.IsTrue (lookup.Contains ("h"));
Assert.IsTrue (lookup.Contains (null));
Assert.IsFalse (lookup.Contains ("d"));
}
[Test]
public void LookupEnumeratorWithoutNull()
{
var lookup = new [] { "hi", "bye" }.ToLookup (c => c [0].ToString ());
Assert.IsTrue (lookup.Any (g => g.Key == "h"));
Assert.IsTrue (lookup.Any (g => g.Key == "b"));
Assert.IsFalse (lookup.Any (g => g.Key == null));
}
[Test]
public void LookupEnumeratorWithNull()
{
var lookup = new [] { "hi", "bye", "42" }.ToLookup (c => (Char.IsNumber (c [0]) ? null : c [0].ToString ()));
Assert.IsTrue (lookup.Any (g => g.Key == "h"));
Assert.IsTrue (lookup.Any (g => g.Key == "b"));
Assert.IsTrue (lookup.Any (g => g.Key == null));
}
[Test]
public void LookupNullKeyNone()
{
var lookup = new [] { "hi", "bye" }.ToLookup (c => c [0].ToString ());
Assert.AreEqual (2, lookup.Count);
Assert.AreEqual (0, lookup [null].Count ());
}
[Test]
public void EmptyResult ()
{
var lookup = GetColors ().ToLookup (
c => c.Name,
c => c.Value,
StringComparer.OrdinalIgnoreCase);
var l = lookup ["notexist"];
Assert.IsNotNull (l);
int [] values = (int []) l;
Assert.AreEqual (values.Length, 0);
}
}
}