def test_inode_block_numbers_should_return_a_list_of_inode_numbers_and_their_block_numbers(
self):
segment = ReadWriteSegment(123)
inum0 = 111
inum1 = 999
segment.write_inode(b'abcd', inum0)
segment.write_inode(b'abcd', inum1)
self.assertEqual(segment.inode_block_numbers(), [(inum0, 0),
(inum1, 1)])
def test_to_read_only_should_return_a_read_only_segment_with_same_bytes(
self):
block_size = 64
segment = ReadWriteSegment(123, block_size=block_size)
block_bytes = block_size * b'a'
segment.write_data(block_bytes)
segment.write_inode(block_bytes, 123)
read_only = segment.to_read_only()
self.assertIsInstance(read_only, ReadOnlySegment)
self.assertEqual(read_only.to_bytes(), segment.to_bytes())
def test_write_inode_returns_the_block_number(self):
block_size = 64
segment = ReadWriteSegment(123, block_size=block_size)
block_bytes = block_size * b'a'
for expected_block_number in range(5):
returned_block_number = segment.write_inode(block_bytes, 123)
self.assertEqual(returned_block_number, expected_block_number)
def test_write_inode_when_bytes_is_a_full_block_does_not_pad_the_block(
self):
block_size = 64
segment = ReadWriteSegment(123, block_size=block_size)
block_bytes = block_size * b'a'
block_number = segment.write_inode(block_bytes, 123)
self.assertEqual(segment.read_block(block_number), block_bytes)
self.assertEqual(block_number, 0)
def test_write_inode_when_bytes_less_than_block_pads_the_block(self):
block_size = 64
segment = ReadWriteSegment(123, block_size=block_size)
block_bytes = (block_size // 2) * b'a'
block_number = segment.write_inode(block_bytes, 123)
padded_block = block_bytes + b'\0' * (block_size - len(block_bytes))
self.assertEqual(segment.read_block(block_number), padded_block)
self.assertEqual(block_number, 0)