Nuclex.Support/Source/Plugins/InstanceEmployer.Test.cs

130 lines
4.0 KiB
C#

#region CPL License
/*
Nuclex Framework
Copyright (C) 2002-2009 Nuclex Development Labs
This library is free software; you can redistribute it and/or
modify it under the terms of the IBM Common Public License as
published by the IBM Corporation; either version 1.0 of the
License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
IBM Common Public License for more details.
You should have received a copy of the IBM Common Public
License along with this library
*/
#endregion
using System;
using System.IO;
#if UNITTEST
using NUnit.Framework;
using NUnit.Framework.SyntaxHelpers;
namespace Nuclex.Support.Plugins {
/// <summary>Unit Test for the instance employer class</summary>
[TestFixture]
public class InstanceEmployerTest {
#region class Base
/// <summary>
/// Abstract base class to serve as abstract product for testing the instance employer
/// </summary>
private abstract class Base { }
#endregion // class Base
#region class Derived
/// <summary>
/// Class derived from the abstract base to serve as concrete product for
/// testing the instance employer
/// </summary>
private class Derived : Base { }
#endregion // class Derived
#region class Unrelated
/// <summary>Unrelated class used to test the instance employer</summary>
private class Unrelated { }
#endregion // class Unrelated
/// <summary>
/// Tests whether the instance employer can detect employable types
/// </summary>
[Test]
public void TestCanEmploy() {
InstanceEmployer<Base> testEmployer = new InstanceEmployer<Base>();
Assert.IsFalse(testEmployer.CanEmploy(typeof(Base)));
Assert.IsTrue(testEmployer.CanEmploy(typeof(Derived)));
Assert.IsFalse(testEmployer.CanEmploy(typeof(Unrelated)));
}
/// <summary>
/// Tests whether the instance employer throws an exception when it is asked to
/// employ an abstract class
/// </summary>
[Test, ExpectedException(typeof(MissingMethodException))]
public void TestThrowOnEmployAbstractClass() {
InstanceEmployer<Base> testEmployer = new InstanceEmployer<Base>();
testEmployer.Employ(typeof(Base));
}
/// <summary>
/// Tests whether the instance employer throws an exception when it is asked to
/// employ a class that is not the product type or a derivative thereof
/// </summary>
[Test, ExpectedException(typeof(InvalidCastException))]
public void TestThrowOnEmployUnrelatedClass() {
InstanceEmployer<Base> testEmployer = new InstanceEmployer<Base>();
testEmployer.Employ(typeof(Unrelated));
}
/// <summary>
/// Tests whether the instance employer can employ a class derived from the product
/// </summary>
[Test]
public void TestEmployClassDerivedFromProduct() {
InstanceEmployer<Base> testEmployer = new InstanceEmployer<Base>();
testEmployer.Employ(typeof(Derived));
Assert.AreEqual(1, testEmployer.Instances.Count);
Assert.AreEqual(typeof(Derived), testEmployer.Instances[0].GetType());
Assert.IsInstanceOfType(typeof(Derived), testEmployer.Instances[0]);
}
/// <summary>
/// Tests whether the instance employer can employ the product class itself if it
/// isn't abstract
/// </summary>
[Test]
public void TestEmployProduct() {
InstanceEmployer<Unrelated> testEmployer = new InstanceEmployer<Unrelated>();
testEmployer.Employ(typeof(Unrelated));
Assert.AreEqual(1, testEmployer.Instances.Count);
Assert.AreEqual(typeof(Unrelated), testEmployer.Instances[0].GetType());
Assert.IsInstanceOfType(typeof(Unrelated), testEmployer.Instances[0]);
}
}
} // namespace Nuclex.Support.Plugins
#endif // UNITTEST