public void DoStuffWithNullContextWillThrow(NameAppender sut, SomeValue sv)
 {
     // Fixture setup
     // Exercise system and verify outcome
     Assert.Throws<ArgumentNullException>(() =>
         sut.DoStuff(sv, null));
     // Teardown
 }
 public void SutIsAddIn(NameAppender sut)
 {
     // Fixture setup
     // Exercise system
     // Verify outcome
     Assert.IsAssignableFrom<IAddIn>(sut);
     // Teardown
 }
 public void DoStuffWillAppendContextNameToMessage(NameAppender sut, SomeValue value, string contextName, Mock<ISomeContext> contextStub)
 {
     // Fixture setup
     var expectedResult = contextName + value.Message;
     contextStub.SetupGet(ctx => ctx.Name).Returns(contextName);
     // Exercise system
     var result = sut.DoStuff(value, contextStub.Object);
     // Verify outcome
     Assert.Equal<string>(expectedResult, result);
     // Teardown
 }