basetest.py 文件源码

def assertMultiLineEqual(self, first, second, msg=None):
    """Assert that two multi-line strings are equal."""
    assert isinstance(first, types.StringTypes), (
        'First argument is not a string: %r' % (first,))
    assert isinstance(second, types.StringTypes), (
        'Second argument is not a string: %r' % (second,))

    if first == second:
      return
    if msg:
      failure_message = [msg, ':\n']
    else:
      failure_message = ['\n']
    for line in difflib.ndiff(first.splitlines(True), second.splitlines(True)):
      failure_message.append(line)
      if not line.endswith('\n'):
        failure_message.append('\n')
    raise self.failureException(''.join(failure_message))