Method test_worker_decode_error

Lib/test/test_regrtest.py:2066–2111

(self)

                          output)

    def test_worker_decode_error(self):
        # gh-109425: Use "backslashreplace" error handler to decode stdout.
        if sys.platform == 'win32':
            encoding = locale.getencoding()
        else:
            encoding = sys.stdout.encoding
            if encoding is None:
                encoding = sys.__stdout__.encoding
                if encoding is None:
                    self.skipTest("cannot get regrtest worker encoding")

        nonascii = bytes(ch for ch in range(128, 256))
        corrupted_output = b"nonascii:%s\n" % (nonascii,)
        # gh-108989: On Windows, assertion errors are written in UTF-16: when
        # decoded each letter is follow by a NUL character.
        assertion_failed = 'Assertion failed: tstate_is_alive(tstate)\n'
        corrupted_output += assertion_failed.encode('utf-16-le')
        try:
            corrupted_output.decode(encoding)
        except UnicodeDecodeError:
            pass
        else:
            self.skipTest(f"{encoding} can decode non-ASCII bytes")

        expected_line = corrupted_output.decode(encoding, 'backslashreplace')

        code = textwrap.dedent(fr"""
            import sys
            import unittest

            class Tests(unittest.TestCase):
                def test_pass(self):
                    pass

            # bytes which cannot be decoded from UTF-8
            corrupted_output = {corrupted_output!a}
            sys.stdout.buffer.write(corrupted_output)
            sys.stdout.buffer.flush()
        """)
        testname = self.create_test(code=code)

        output = self.run_tests("--fail-env-changed", "-v", "-j1", testname)
        self.check_executed_tests(output, [testname],
                                  parallel=True,
                                  stats=1)
        self.check_line(output, expected_line, regex=False)

    def test_doctest(self):
        code = textwrap.dedent(r'''