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);
}