Implement EnvDTE.CodeFunction.MustImplement

Returns true if the method is abstract.

src/AddIns/Misc/PackageManagement/Project/Src/EnvDTE/CodeFunction.cs

@@ -85,7 +85,7 @@ namespace ICSharpCode.PackageManagement.EnvDTE
 		}
 		
 		public virtual bool MustImplement {
-			get { throw new NotImplementedException(); }
+			get { return method.IsAbstract; }
 		}
 	}
 }

src/AddIns/Misc/PackageManagement/Test/Src/EnvDTE/CodeFunctionTests.cs

@@ -75,6 +75,11 @@ namespace PackageManagement.Tests.EnvDTE
 			helper.MakeMethodStatic();
 		}
 		
+		void MakeMethodAbstract()
+		{
+			helper.MakeMethodAbstract();
+		}
+		
 		[Test]
 		public void Access_PublicFunction_ReturnsPublic()
 		{
@@ -298,5 +303,26 @@ namespace PackageManagement.Tests.EnvDTE
 			
 			Assert.IsFalse(shared);
 		}
+		
+		[Test]
+		public void MustImplement_AbstractMethod_ReturnsTrue()
+		{
+			CreatePublicFunction("MyClass.MyFunction");
+			MakeMethodAbstract();
+			
+			bool mustImplement = codeFunction.MustImplement;
+			
+			Assert.IsTrue(mustImplement);
+		}
+		
+		[Test]
+		public void MustImplement_MethodIsNotAbstract_ReturnsFalse()
+		{
+			CreatePublicFunction("MyClass.MyFunction");
+			
+			bool mustImplement = codeFunction.MustImplement;
+			
+			Assert.IsFalse(mustImplement);
+		}
 	}
 }

src/AddIns/Misc/PackageManagement/Test/Src/Helpers/MethodHelper.cs

@@ -123,5 +123,10 @@ namespace PackageManagement.Tests.Helpers
 		{
 			Method.Stub(m => m.IsStatic).Return(true);
 		}
+		
+		public void MakeMethodAbstract()
+		{
+			Method.Stub(m => m.IsAbstract).Return(true);
+		}
 	}
 }