def test_to_unicode_decodes_to_unicode(self):
# Byte strings are decoded as ASCII by _to_unicode(), replacing
# all non-ASCII characters with U+FFFD REPLACEMENT CHARACTERs.
byte_string = b"This string will be converted. \xe5\xb2\x81\xe5."
expected_unicode_string = (
"This string will be converted. \ufffd\ufffd\ufffd\ufffd.")
converted_string = ExternalProcessError._to_unicode(byte_string)
self.assertIsInstance(converted_string, str)
self.assertEqual(expected_unicode_string, converted_string)
def test_to_unicode_defers_to_unicode_constructor(self):
# Unicode strings and non-byte strings are handed to unicode()
# to undergo Python's normal coercion strategy. (For unicode
# strings this is actually a no-op, but it's cheaper to do this
# than special-case unicode strings.)
self.assertEqual(str(self), ExternalProcessError._to_unicode(self))