def test_reader_size(self):
"""Test that the image reader takes into account the specified size."""
content = 'XXX'
image = six.StringIO(content)
expected_checksum = hashlib.md5(content).hexdigest()
checksum = hashlib.md5()
reader = vm_store._Reader(image, checksum, blocksize=1)
ret = reader.read(size=3)
self.assertEqual('1\r\n', ret)
ret = reader.read(size=1)
self.assertEqual('X', ret)
ret = reader.read()
self.assertEqual(expected_checksum, reader.checksum.hexdigest())
self.assertEqual(image.len, reader.size)
self.assertTrue(reader.closed)
def test_reader_image_larger_blocksize(self):
"""
Test that the image file reader returns the expected chunks when
the block size specified is smaller than the image.
"""
content = 'XXX'
image = six.StringIO(content)
expected_checksum = hashlib.md5(content).hexdigest()
checksum = hashlib.md5()
last_chunk = '0\r\n\r\n'
reader = vm_store._Reader(image, checksum, blocksize=1)
ret = reader.read()
expected_chunk = '1\r\nX\r\n'
self.assertEqual('%s%s%s%s' % (expected_chunk, expected_chunk,
expected_chunk, last_chunk), ret)
self.assertEqual(expected_checksum, reader.checksum.hexdigest())
self.assertEqual(image.len, reader.size)
self.assertTrue(reader.closed)
def test_reader_image_fits_in_blocksize(self):
"""
Test that the image file reader returns the expected chunk of data
when the block size is larger than the image.
"""
content = 'XXX'
image = six.StringIO(content)
expected_checksum = hashlib.md5(content).hexdigest()
checksum = hashlib.md5()
reader = vm_store._Reader(image, checksum)
ret = reader.read()
expected_chunk = '%x\r\n%s\r\n' % (len(content), content)
last_chunk = '0\r\n\r\n'
self.assertEqual('%s%s' % (expected_chunk, last_chunk), ret)
self.assertEqual(image.len, reader.size)
self.assertEqual(expected_checksum, reader.checksum.hexdigest())
self.assertTrue(reader.closed)
ret = reader.read()
self.assertEqual(image.len, reader.size)
self.assertEqual(expected_checksum, reader.checksum.hexdigest())
self.assertTrue(reader.closed)
self.assertEqual('', ret)