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//
// LazyInitializerTest.cs
//
// Authors:
// Marek Safar (marek.safar@gmail.com)
//
// Copyright 2011 Xamarin, Inc (http://www.xamarin.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.Threading;
using NUnit.Framework;
namespace MonoTests.System.Threading
{
[TestFixture]
public class LazyInitializerTest
{
class C
{
public C ()
{
++Counter;
}
public int Counter { get; private set; }
}
[Test]
public void EnsureInitialized_Simple ()
{
C c = null;
c = LazyInitializer.EnsureInitialized (ref c);
Assert.IsNotNull (c, "#1");
Assert.AreEqual (1, c.Counter, "#2");
}
[Test]
public void EnsureInitialized_FactoryIsNull ()
{
C c = null;
try {
LazyInitializer.EnsureInitialized (ref c, () => (C) null);
Assert.Fail ();
} catch (InvalidOperationException) {
}
}
[Test]
public void EnsureInitialized_NullLock ()
{
C c = null;
bool init = false;
object sync_lock = null;
c = LazyInitializer.EnsureInitialized (ref c, ref init, ref sync_lock);
Assert.IsNotNull (c, "#1");
Assert.AreEqual (1, c.Counter, "#2");
Assert.IsTrue (init, "#3");
Assert.IsNotNull (sync_lock, "#4");
var old_lock = sync_lock;
var d = LazyInitializer.EnsureInitialized (ref c, ref init, ref sync_lock);
Assert.AreEqual (c, d, "#11");
Assert.AreEqual (1, c.Counter, "#12");
Assert.IsTrue (init, "#13");
Assert.AreEqual (old_lock, sync_lock, "#14");
}
}
}
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