test_snappy.py

# Copyright (c) 2011, Andres Moreira <andres@andresmoreira.com>
# All rights reserved.
# 
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# modification, are permitted provided that the following conditions are met:
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#       notice, this list of conditions and the following disclaimer.
#     * Redistributions in binary form must reproduce the above copyright
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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import os
import snappy
from unittest import TestCase

class SnappyCompressionTest(TestCase):

    def test_simple_compress(self):
        text = "hello world!"
        compressed = snappy.compress(text)
        self.assertEquals(text, snappy.uncompress(compressed))

    def test_moredata_compress(self):
        text = "snappy +" * 1000 + " " + "by " * 1000 + " google"
        compressed = snappy.compress(text)
        self.assertEquals(text, snappy.uncompress(compressed))

    def test_randombytes_compress(self):
        _bytes = repr(os.urandom(1000))
        compressed = snappy.compress(_bytes)
        self.assertEquals(_bytes, snappy.uncompress(compressed))

    def test_randombytes2_compress(self):
        _bytes = str(os.urandom(10000))
        compressed = snappy.compress(_bytes)
        self.assertEquals(_bytes, snappy.uncompress(compressed))

    def test_uncompress_error(self):
        self.assertRaises(snappy.UncompressError, snappy.uncompress, "hoa")

    def test_unicode_compress(self):
        text = u"hello unicode world!"
        compressed = snappy.compress(text)
        self.assertEquals(text, snappy.uncompress(compressed))

    def test_decompress(self):
        # decompress == uncompress, just to support compatibility with zlib
        text = "hello world!"
        compressed = snappy.compress(text)
        self.assertEquals(text, snappy.decompress(compressed))

class SnappyValidBufferTest(TestCase):

    def test_valid_compressed_buffer(self):
        text = "hello world!"
        compressed = snappy.compress(text)
        uncompressed = snappy.uncompress(compressed)
        self.assertEquals(text == uncompressed, snappy.isValidCompressed(compressed))

    def test_invalid_compressed_buffer(self):
        self.assertFalse(snappy.isValidCompressed("not compressed"))