def test_read():
buffer = Buffer()
buffer.add(b"spam")
assert buffer.read(2) == b"sp"
assert buffer.read(2) == b"am"
buffer.add(b"eggs")
assert buffer.read() == b"eggs"
with pytest.raises(BufferUnderrun):
buffer.read(1)
def test_save_discard_restore():
buffer = Buffer()
buffer.add(b"spam")
buffer.save()
assert len(buffer) == 4
buffer.discard()
assert len(buffer) == 0
buffer.restore()
assert len(buffer) == 4
def test_unpack_chat():
buffer = Buffer()
buffer.add(b'\x11["spam", " eggs"]')
assert buffer.unpack_chat().to_string() == "spam eggs"
buffer.add(b'\x22{"text": "spam", "extra": " eggs"}')
assert buffer.unpack_chat().to_string() == "spam eggs"
buffer.add(b'\x14{"translate": "foo"}')
assert buffer.unpack_chat().to_string() == "foo"
buffer.add(b'\x2E{"translate": "foo", "with": ["spam", "eggs"]}')
assert buffer.unpack_chat().to_string() == "foo{spam, eggs}"
def load_chunk(self, chunk_x, chunk_z):
"""
Loads the chunk at the given co-ordinates from the region file.
The co-ordinates should range from 0 to 31. Returns a ``TagRoot``.
"""
buff = Buffer()
# Read extent header
self.fd.seek(4 * (32 * chunk_z + chunk_x))
buff.add(self.fd.read(4))
entry = buff.unpack('I')
chunk_offset, chunk_length = entry >> 8, entry & 0xFF
if chunk_offset == 0:
raise ValueError((chunk_x, chunk_z))
# Read chunk
self.fd.seek(4096 * chunk_offset)
buff.add(self.fd.read(4096 * chunk_length))
chunk = buff.read(buff.unpack('IB')[0])
chunk = zlib.decompress(chunk)
chunk = TagRoot.from_bytes(chunk)
return chunk
def test_unpack_entity_metadata():
buffer = Buffer()
for value, data in entity_metadata_vectors:
buffer.add(data)
assert buffer.unpack_entity_metadata() == value
assert len(buffer) == 0
def test_unpack_slot():
buffer = Buffer()
for value, data in slot_vectors:
buffer.add(data)
assert buffer.unpack_slot() == value
assert len(buffer) == 0
def test_unpack_uuid():
buffer = Buffer()
buffer.add(uuid_vector)
assert buffer.unpack_uuid().to_bytes() == uuid_vector
def test_unpack_json():
buffer = Buffer()
buffer.add(b'\x10{"spam": "eggs"}')
assert buffer.unpack_json() == {"spam": "eggs"}
def test_unpack_string():
buffer = Buffer()
buffer.add(b"\x04spam")
assert buffer.unpack_string() == "spam"
def test_unpack():
buffer = Buffer()
for fmt, data, values in pack_unpack_vectors:
buffer.add(data)
assert buffer.unpack(fmt) == values
def test_add():
buffer = Buffer()
buffer.add(b"spam")
assert len(buffer) == 4
assert buffer.read() == b"spam"