Method test_strings

Lib/test/test_gdb/test_pretty_print.py:115–159

Verify the pretty-printing of unicode strings

(self)

    @support.requires_resource('cpu')
    def test_strings(self):
        'Verify the pretty-printing of unicode strings'
        # We cannot simply call locale.getpreferredencoding() here,
        # as GDB might have been linked against a different version
        # of Python with a different encoding and coercion policy
        # with respect to PEP 538 and PEP 540.
        stdout, stderr = run_gdb(
            '--eval-command',
            'python import locale; print(locale.getpreferredencoding())')

        encoding = stdout
        if stderr or not encoding:
            raise RuntimeError(
                f'unable to determine the Python locale preferred encoding '
                f'of embedded Python in GDB\n'
                f'stdout={stdout!r}\n'
                f'stderr={stderr!r}')

        def check_repr(text):
            try:
                text.encode(encoding)
            except UnicodeEncodeError:
                self.assertGdbRepr(text, ascii(text))
            else:
                self.assertGdbRepr(text)

        self.assertGdbRepr('')
        self.assertGdbRepr('And now for something hopefully the same')
        self.assertGdbRepr('string with embedded NUL here \0 and then some more text')

        # Test printing a single character:
        #    U+2620 SKULL AND CROSSBONES
        check_repr('\u2620')

        # Test printing a Japanese unicode string
        # (I believe this reads "mojibake", using 3 characters from the CJK
        # Unified Ideographs area, followed by U+3051 HIRAGANA LETTER KE)
        check_repr('\u6587\u5b57\u5316\u3051')

        # Test a character outside the BMP:
        #    U+1D121 MUSICAL SYMBOL C CLEF
        # This is:
        # UTF-8: 0xF0 0x9D 0x84 0xA1
        # UTF-16: 0xD834 0xDD21
        check_repr(chr(0x1D121))

    def test_tuples(self):
        'Verify the pretty-printing of tuples'