from __future__ import unicode_literals

try:

    import unittest2 as unittest

except ImportError:

    import unittest

import zstd

from . common import (

    make_cffi,

)

@make_cffi

class TestModuleAttributes(unittest.TestCase):

    def test_version(self):

        self.assertEqual(zstd.ZSTD_VERSION, (1, 1, 3))

    def test_constants(self):

        self.assertEqual(zstd.MAX_COMPRESSION_LEVEL, 22)

        self.assertEqual(zstd.FRAME_HEADER, b'\x28\xb5\x2f\xfd')

    def test_hasattr(self):

        attrs = (

            'COMPRESSION_RECOMMENDED_INPUT_SIZE',

            'COMPRESSION_RECOMMENDED_OUTPUT_SIZE',

            'DECOMPRESSION_RECOMMENDED_INPUT_SIZE',

            'DECOMPRESSION_RECOMMENDED_OUTPUT_SIZE',

            'MAGIC_NUMBER',

            'WINDOWLOG_MIN',

            'WINDOWLOG_MAX',

            'CHAINLOG_MIN',

            'CHAINLOG_MAX',

            'HASHLOG_MIN',

            'HASHLOG_MAX',

            'HASHLOG3_MAX',

            'SEARCHLOG_MIN',

            'SEARCHLOG_MAX',

            'SEARCHLENGTH_MIN',

            'SEARCHLENGTH_MAX',

            'TARGETLENGTH_MIN',

            'TARGETLENGTH_MAX',

            'STRATEGY_FAST',

            'STRATEGY_DFAST',

            'STRATEGY_GREEDY',

            'STRATEGY_LAZY',

            'STRATEGY_LAZY2',

            'STRATEGY_BTLAZY2',

            'STRATEGY_BTOPT',

        )

        for a in attrs:

            self.assertTrue(hasattr(zstd, a), a)