Method test_zstdfile_flush

Lib/test/test_zstd.py:2410–2443

(self)

        self.assertEqual(b''.join(lst), THIS_FILE_BYTES*5)

    def test_zstdfile_flush(self):
        # closed
        f = ZstdFile(io.BytesIO(), 'w')
        f.close()
        with self.assertRaises(ValueError):
            f.flush()

        # read
        with ZstdFile(io.BytesIO(), 'r') as f:
            # does nothing for read-only stream
            f.flush()

        # write
        DAT = b'abcd'
        bi = io.BytesIO()
        with ZstdFile(bi, 'w') as f:
            self.assertEqual(f.write(DAT), len(DAT))
            self.assertEqual(f.tell(), len(DAT))
            self.assertEqual(bi.tell(), 0) # not enough for a block

            self.assertEqual(f.flush(), None)
            self.assertEqual(f.tell(), len(DAT))
            self.assertGreater(bi.tell(), 0) # flushed

        # write, no .flush() method
        class C:
            def write(self, b):
                return len(b)
        with ZstdFile(C(), 'w') as f:
            self.assertEqual(f.write(DAT), len(DAT))
            self.assertEqual(f.tell(), len(DAT))

            self.assertEqual(f.flush(), None)
            self.assertEqual(f.tell(), len(DAT))

    def test_zstdfile_flush_mode(self):
        self.assertEqual(ZstdFile.FLUSH_BLOCK, ZstdCompressor.FLUSH_BLOCK)