69 lines
2.1 KiB
C#
69 lines
2.1 KiB
C#
#region Apache License 2.0
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/*
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Nuclex .NET Framework
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Copyright (C) 2002-2024 Markus Ewald / Nuclex Development Labs
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#endregion // Apache License 2.0
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using System;
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using System.IO;
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#if UNITTEST
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using NUnit.Framework;
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namespace Nuclex.Support {
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/// <summary>Unit Test for the shared instance provider class</summary>
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[TestFixture]
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internal class SharedTest {
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#region class Dummy
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/// <summary>Dummy class for testing the shared instance provider</summary>
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private class Dummy {
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/// <summary>Initializes a new dummy</summary>
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public Dummy() {}
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}
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#endregion // class Dummy
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/// <summary>
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/// Verifies that the shared instance provider returns the same instance of a class
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/// when asked for the same class twice.
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/// </summary>
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[Test]
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public void TestSameInstance() {
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#pragma warning disable 0618
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Dummy dummyInstance = Shared<Dummy>.Instance;
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Dummy otherDummyInstance = Shared<Dummy>.Instance;
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#pragma warning restore 0618
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// Make sure they're the same instance. We could have put an instance counter in
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// the dummy class, but this might or might not work well across multiple tests
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// because the order in which tests are executed is undefined and Shared<> changes
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// its global state when the first test is run by remembering the instance.
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//
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// Maybe this really is a defect in Shared<> and the class should be equipped with
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// a method such as Discard() or Dispose() to get rid of the instance?
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Assert.AreSame(dummyInstance, otherDummyInstance);
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}
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}
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} // namespace Nuclex.Support
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#endif // UNITTEST
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