public void ValidateContents_CallsAppropriateMethods() { // Arrange var contents = fixture.Create <string>(); // Act _sut.ValidateContents(contents); // Assert _parserServiceMock.Verify(s => s.ValidateCount(It.Is <string>(x => x == contents)), Times.Once); _parserServiceMock.Verify(s => s.ValidateNesting(It.Is <string>(x => x == contents)), Times.Once); }