95 lines
2.5 KiB
C#
95 lines
2.5 KiB
C#
//
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// LazyInitializerTest.cs
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//
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// Authors:
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// Marek Safar (marek.safar@gmail.com)
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//
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// Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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using System.Threading;
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using NUnit.Framework;
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namespace MonoTests.System.Threading
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{
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[TestFixture]
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public class LazyInitializerTest
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{
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class C
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{
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public C ()
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{
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++Counter;
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}
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public int Counter { get; private set; }
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}
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[Test]
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public void EnsureInitialized_Simple ()
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{
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C c = null;
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c = LazyInitializer.EnsureInitialized (ref c);
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Assert.IsNotNull (c, "#1");
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Assert.AreEqual (1, c.Counter, "#2");
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}
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[Test]
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public void EnsureInitialized_FactoryIsNull ()
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{
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C c = null;
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try {
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LazyInitializer.EnsureInitialized (ref c, () => (C) null);
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Assert.Fail ();
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} catch (InvalidOperationException) {
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}
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}
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[Test]
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public void EnsureInitialized_NullLock ()
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{
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C c = null;
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bool init = false;
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object sync_lock = null;
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c = LazyInitializer.EnsureInitialized (ref c, ref init, ref sync_lock);
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Assert.IsNotNull (c, "#1");
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Assert.AreEqual (1, c.Counter, "#2");
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Assert.IsTrue (init, "#3");
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Assert.IsNotNull (sync_lock, "#4");
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var old_lock = sync_lock;
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var d = LazyInitializer.EnsureInitialized (ref c, ref init, ref sync_lock);
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Assert.AreEqual (c, d, "#11");
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Assert.AreEqual (1, c.Counter, "#12");
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Assert.IsTrue (init, "#13");
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Assert.AreEqual (old_lock, sync_lock, "#14");
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}
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}
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}
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