Method test_fspath_support

Lib/test/test_io.py:993–1019

(self)

                self.assertEqual(bytes(buffer), b"12345")

    def test_fspath_support(self):
        def check_path_succeeds(path):
            with self.open(path, "w", encoding="utf-8") as f:
                f.write("egg\n")

            with self.open(path, "r", encoding="utf-8") as f:
                self.assertEqual(f.read(), "egg\n")

        check_path_succeeds(FakePath(os_helper.TESTFN))
        check_path_succeeds(FakePath(os.fsencode(os_helper.TESTFN)))

        with self.open(os_helper.TESTFN, "w", encoding="utf-8") as f:
            bad_path = FakePath(f.fileno())
            with self.assertRaises(TypeError):
                self.open(bad_path, 'w', encoding="utf-8")

        bad_path = FakePath(None)
        with self.assertRaises(TypeError):
            self.open(bad_path, 'w', encoding="utf-8")

        bad_path = FakePath(FloatingPointError)
        with self.assertRaises(FloatingPointError):
            self.open(bad_path, 'w', encoding="utf-8")

        # ensure that refcounting is correct with some error conditions
        with self.assertRaisesRegex(ValueError, 'read/write/append mode'):
            self.open(FakePath(os_helper.TESTFN), 'rwxa', encoding="utf-8")

    def test_RawIOBase_readall(self):
        # Exercise the default unlimited RawIOBase.read() and readall()