def METHOD_NAME(self):
    assert split_cgi_response(b'header1: bar:foo\r\nheader2\n\r\ncontent\r\n\r\ncontent')  == \
        ({'Header1': 'bar:foo', 'Header2': None}, b'content\r\n\r\ncontent')
    assert split_cgi_response(b'header1\r\nheader2\n\ncontent\r\n\r\ncontent')  == \
        ({'Header1': None, 'Header2': None}, b'content\r\n\r\ncontent')
    assert split_cgi_response(b'header1\nheader2\r\n\r\ncontent\r\n\r\ncontent')  == \
        ({'Header1': None, 'Header2': None}, b'content\r\n\r\ncontent')