def test_start_single_quote_x2(self): self.assertEqual(dq("''asdf"), '''"''asdf"''')
def test_backslash(self): self.assertEqual(dq(r"fred\bloggs"), r'"fred\bloggs"')
def test_single_quote(self): self.assertEqual(dq("'"), '''"'"''')
def test_newline(self): self.assertEqual(dq("fred\nbloggs"), '"fred\nbloggs"')
def test_end_double_quote_x2(self): self.assertEqual(dq('asdf""'), '"asdf"""""')
def test_start_double_quote_x2(self): self.assertEqual(dq('""asdf'), '"""""asdf"')
def test_double_quote_x2(self): self.assertEqual(dq('""'), '""""""')
def test_empty(self): self.assertEqual(dq(""), '""')