public void ThrowFormatExceptionIfInputIsInBadFormat()
{
var sut = new DateTimeParser();
string invalidDateTimeText = "10/21/2015";
Assert.Throws<FormatException>(() => sut.Parse(invalidDateTimeText));
}
public void TestThatValidDateTimeTextParsesSuccesfully(string input, int expectedYear, int expectedMonth, int expectedDay)
{
var sut = new DateTimeParser();
var expected = new DateTime(expectedYear, expectedMonth, expectedDay);
var actual = sut.Parse(input);
_output.WriteLine("Expected: {0}\nActual: {1}", expected, actual);
Assert.Equal(expected, actual);
}