class TestStorage(object):
def setup(self):
self.f = tempfile.NamedTemporaryFile()
self.p = Storage(self.f)
def _get_superblock_and_data(self, value):
superblock = value[:Storage.SUPERBLOCK_SIZE]
data = value[Storage.SUPERBLOCK_SIZE:]
return superblock, data
def _get_f_contents(self):
self.f.flush()
with open(self.f.name, 'rb') as f:
return f.read()
def test_init_ensures_superblock(self):
EMPTY_SUPERBLOCK = (b'\x00' * Storage.SUPERBLOCK_SIZE)
self.f.seek(0, os.SEEK_END)
value = self._get_f_contents()
eq_(value, EMPTY_SUPERBLOCK)
def test_write(self):
self.p.write(b'ABCDE')
value = self._get_f_contents()
superblock, data = self._get_superblock_and_data(value)
eq_(data, b'\x00\x00\x00\x00\x00\x00\x00\x05ABCDE')
def test_read(self):
self.f.seek(Storage.SUPERBLOCK_SIZE)
self.f.write(b'\x00\x00\x00\x00\x00\x00\x00\x0801234567')
value = self.p.read(Storage.SUPERBLOCK_SIZE)
eq_(value, b'01234567')
def test_commit_root_address(self):
self.p.commit_root_address(257)
root_bytes = self._get_f_contents()[:8]
eq_(root_bytes, b'\x00\x00\x00\x00\x00\x00\x01\x01')
def test_get_root_address(self):
self.f.seek(0)
self.f.write(b'\x00\x00\x00\x00\x00\x00\x02\x02')
root_address = self.p.get_root_address()
eq_(root_address, 514)
def test_workflow(self):
a1 = self.p.write(b'one')
a2 = self.p.write(b'two')
self.p.commit_root_address(a2)
a3 = self.p.write(b'three')
eq_(self.p.get_root_address(), a2)
a4 = self.p.write(b'four')
self.p.commit_root_address(a4)
eq_(self.p.read(a1), b'one')
eq_(self.p.read(a2), b'two')
eq_(self.p.read(a3), b'three')
eq_(self.p.read(a4), b'four')
eq_(self.p.get_root_address(), a4)
class TestStorage(object):
def setup(self):
self.f = tempfile.NamedTemporaryFile()
self.p = Storage(self.f)
def _get_superblock_and_data(self, value):
superblock = value[:Storage.SUPERBLOCK_SIZE]
data = value[Storage.SUPERBLOCK_SIZE:]
return superblock, data
def _get_f_contents(self):
self.f.flush()
with open(self.f.name, 'rb') as f:
return f.read()
def test_init_ensures_superblock(self):
EMPTY_SUPERBLOCK = (b'\x00' * Storage.SUPERBLOCK_SIZE)
self.f.seek(0, os.SEEK_END)
value = self._get_f_contents()
eq_(value, EMPTY_SUPERBLOCK)
def test_write(self):
self.p.write(b'ABCDE')
value = self._get_f_contents()
superblock, data = self._get_superblock_and_data(value)
eq_(data, b'\x00\x00\x00\x00\x00\x00\x00\x05ABCDE')
def test_read(self):
self.f.seek(Storage.SUPERBLOCK_SIZE)
self.f.write(b'\x00\x00\x00\x00\x00\x00\x00\x0801234567')
value = self.p.read(Storage.SUPERBLOCK_SIZE)
eq_(value, b'01234567')
def test_commit_root_address(self):
self.p.commit_root_address(257)
root_bytes = self._get_f_contents()[:8]
eq_(root_bytes, b'\x00\x00\x00\x00\x00\x00\x01\x01')
def test_get_root_address(self):
self.f.seek(0)
self.f.write(b'\x00\x00\x00\x00\x00\x00\x02\x02')
root_address = self.p.get_root_address()
eq_(root_address, 514)
def test_workflow(self):
a1 = self.p.write(b'one')
a2 = self.p.write(b'two')
self.p.commit_root_address(a2)
a3 = self.p.write(b'three')
eq_(self.p.get_root_address(), a2)
a4 = self.p.write(b'four')
self.p.commit_root_address(a4)
eq_(self.p.read(a1), b'one')
eq_(self.p.read(a2), b'two')
eq_(self.p.read(a3), b'three')
eq_(self.p.read(a4), b'four')
eq_(self.p.get_root_address(), a4)
class TestStorage(object):
def setup(self):
self.f = tempfile.NamedTemporaryFile(delete=False)
self.p = Storage(self.f)
def teardown(self):
for key, value in self.__dict__.items():
if isinstance(value,
type(tempfile.NamedTemporaryFile(delete=False))):
value.close()
def _get_fd_contents(self, fd):
fd.seek(0, os.SEEK_END)
fd.flush()
fd.seek(0)
return fd.read()
def _get_superblock_and_data(self, value):
superblock = value[:Storage.SUPERBLOCK_SIZE]
data = value[Storage.SUPERBLOCK_SIZE:]
return superblock, data
def test_init_ensures_superblock(self):
EMPTY_SUPERBLOCK = (b'\x00' * Storage.SUPERBLOCK_SIZE)
value = self._get_fd_contents(self.f)
eq_(value, EMPTY_SUPERBLOCK)
def test_can_get_f_contents(self):
self.ff = tempfile.NamedTemporaryFile(delete=False)
self.ff.write(b"\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF")
self.ff.flush()
self.ff.seek(0)
self.pp = Storage(self.ff)
self.pp.write(b"ABCDE")
value = self.pp._get_all_contents()
eq_(value, (b'\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF' + b'\x00' *
(Storage.SUPERBLOCK_SIZE - 8)) +
b"\x00\x00\x00\x00\x00\x00\x00\x05ABCDE")
def test_dirty_file_can_init_ensures_superblock(self):
self.ff = tempfile.NamedTemporaryFile(delete=False)
self.ff.write(b"\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF")
self.ff.flush()
self.ff.seek(0)
self.pp = Storage(self.ff)
self.pp.write(b"ABCDE")
value = self._get_fd_contents(self.ff)
superblock, data = self._get_superblock_and_data(value)
DIRTY_SUPERBLOCK = (b'\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF' + b'\x00' *
(Storage.SUPERBLOCK_SIZE - 8))
eq_(superblock, DIRTY_SUPERBLOCK)
eq_(data, b"\x00\x00\x00\x00\x00\x00\x00\x05ABCDE")
def test_can_skip_fill_superblock(self):
DIRTY_SUPERBLOCK = (b'\xFF' * (Storage.SUPERBLOCK_SIZE))
self.ff = tempfile.NamedTemporaryFile(delete=False)
self.ff.write(DIRTY_SUPERBLOCK)
self.ff.flush()
self.ff.seek(0)
self.pp = Storage(self.ff)
self.pp.write(b"ABCDE")
value = self._get_fd_contents(self.ff)
superblock, data = self._get_superblock_and_data(value)
eq_(superblock, DIRTY_SUPERBLOCK)
eq_(data, b"\x00\x00\x00\x00\x00\x00\x00\x05ABCDE")
def test_write(self):
self.p.write(b"ABCDE")
value = self._get_fd_contents(self.f)
superblock, data = self._get_superblock_and_data(value)
EMPTY_SUPERBLOCK = (b'\x00' * Storage.SUPERBLOCK_SIZE)
eq_(superblock, EMPTY_SUPERBLOCK)
eq_(data, b"\x00\x00\x00\x00\x00\x00\x00\x05ABCDE")
def test_read(self):
test_of_address = self.p.write(b"TEST")
data_at_test_of_address = self.p.read(test_of_address)
eq_(data_at_test_of_address, b"TEST")
def test_commit_root_address(self):
self.p.commit_root_address(257)
root_bytes = self._get_fd_contents(self.f)[:8]
eq_(root_bytes, b"\x00\x00\x00\x00\x00\x00\x01\x01")
def test_get_root_address(self):
self.p.commit_root_address(257)
root_address = self.p.get_root_address()
eq_(root_address, 257)
def test_close_after_open(self):
self.p.close()
eq_(True, self.p.closed)
def test_workflow(self):
a1 = self.p.write(b"one")
a2 = self.p.write(b"two")
self.p.commit_root_address(a2)
a3 = self.p.write(b"three")
eq_(self.p.get_root_address(), a2)
a4 = self.p.write(b"four")
self.p.commit_root_address(a4)
eq_(self.p.read(a1), b"one")
eq_(self.p.read(a2), b"two")
eq_(self.p.read(a3), b"three")
eq_(self.p.read(a4), b"four")
eq_(self.p.get_root_address(), a4)
