Fixed a typo; fixed a bug in the plug-in library that would see generic types deriving from a required base class as suitable whereas they cannot be instantiated without a generic argument; added unit tests that reproduce the errors

git-svn-id: file:///srv/devel/repo-conversion/nusu@171 d2e56fa2-650e-0410-a79f-9358c0239efd

Source/Plugins/FactoryEmployer.Test.cs

@@ -50,6 +50,16 @@ namespace Nuclex.Support.Plugins {
 
     #endregion // class Derived
 
+    #region class GenericDerived
+
+    /// <summary>
+    ///   Generic class derived from the abstract base to serve as concrete product
+    ///   for testing the factory employer
+    /// </summary>
+    private class GenericDerived<SomeType> : Base { }
+
+    #endregion // class GenericDerived
+
     #region class Unrelated
 
     /// <summary>Unrelated class used to test the factory employer</summary>
@@ -112,6 +122,19 @@ namespace Nuclex.Support.Plugins {
       );
     }
 
+    /// <summary>
+    ///   Tests whether the factory employer throws an exception when it is asked to
+    ///   employ a class that requires generic parameters for instantiation
+    /// </summary>
+    [Test]
+    public void TestThrowOnEmployGenericClass() {
+      FactoryEmployer<Base> testEmployer = new FactoryEmployer<Base>();
+
+      Assert.Throws<ArgumentException>(
+        delegate() { testEmployer.Employ(typeof(GenericDerived<>)); }
+      );
+    }
+
     /// <summary>
     ///   Tests whether the factory employer can employ a class derived from the product
     /// </summary>