This test requires DRT. It verifies that on Windows only \n's not preceded by \r are translated into \r\n by Pasteboard.

Source:
\nLine1\rLine2\nLine3\r\nLine4\r\r\nLine5\r\n\r\n\n
Result:
\r\nLine1\rLine2\r\nLine3\r\nLine4\r\r\nLine5\r\n\r\n\r\n