def test_to_ascii_encodes_to_bytes(self):
# Yes, this is how you really spell "smorgasbord." Look it up.
unicode_string = "Sm\xf6rg\xe5sbord"
expected_byte_string = b"Sm?rg?sbord"
converted_string = ExternalProcessError._to_ascii(unicode_string)
self.assertIsInstance(converted_string, bytes)
self.assertEqual(expected_byte_string, converted_string)
def test_to_ascii_defers_to_bytes(self):
# Byte strings and non-unicode strings are handed to bytes() to
# undergo Python's normal coercion strategy. (For byte strings
# this is actually a no-op, but it's cheaper to do this than
# special-case byte strings.)
self.assertEqual(
str(self).encode("ascii"), ExternalProcessError._to_ascii(self))
def test_to_ascii_removes_non_printable_chars(self):
# After conversion to a byte string, all non-printable and
# non-ASCII characters are replaced with question marks.
byte_string = b"*How* many roads\x01\x02\xb2\xfe"
expected_byte_string = b"*How* many roads????"
converted_string = ExternalProcessError._to_ascii(byte_string)
self.assertIsInstance(converted_string, bytes)
self.assertEqual(expected_byte_string, converted_string)
