def test_deflater_compress(self):
deflater = Deflater(True)
deflater.write(self.wrap(b"aaaaaaaaaaaaanopqrstuvwxyz"))
self.assertTrue(deflater.compressed)
self.assertEqual(deflater.uncompressed_size, 26)
self.assertNotEqual(deflater.compressed_size,
deflater.uncompressed_size)
self.assertEqual(deflater.crc32, 0xD46B97ED)
# The CRC is the same as when not compressed
deflater = Deflater(False)
self.assertFalse(deflater.compressed)
deflater.write(self.wrap(b"aaaaaaaaaaaaanopqrstuvwxyz"))
self.assertEqual(deflater.crc32, 0xD46B97ED)
def test_deflater_empty(self):
deflater = Deflater(False)
self.assertFalse(deflater.compressed)
self.assertEqual(deflater.uncompressed_size, 0)
self.assertEqual(deflater.compressed_size, deflater.uncompressed_size)
self.assertEqual(deflater.compressed_data, b"")
self.assertEqual(deflater.crc32, 0)
def write(self, data):
if self.mode != "w":
from mozpack.mozjar import Deflater
self.deflater = Deflater(self.compress)
self.mode = "w"
self.deflater.write(data)
def test_deflater_no_compress(self):
deflater = Deflater(False)
deflater.write(self.wrap(b"abc"))
self.assertFalse(deflater.compressed)
self.assertEqual(deflater.uncompressed_size, 3)
self.assertEqual(deflater.compressed_size, deflater.uncompressed_size)
self.assertEqual(deflater.compressed_data, b"abc")
self.assertEqual(deflater.crc32, 0x352441C2)
def test_deflater_compress_no_gain(self):
deflater = Deflater(True)
deflater.write(self.wrap('abc'))
self.assertFalse(deflater.compressed)
self.assertEqual(deflater.uncompressed_size, 3)
self.assertEqual(deflater.compressed_size, deflater.uncompressed_size)
self.assertEqual(deflater.compressed_data, 'abc')
self.assertEqual(deflater.crc32, 0x352441c2)
