def test_read_block():
delimiter = b'\n'
data = delimiter.join([b'123', b'456', b'789'])
f = io.BytesIO(data)
assert read_block(f, 1, 2) == b'23'
assert read_block(f, 0, 1, delimiter=b'\n') == b'123\n'
assert read_block(f, 0, 2, delimiter=b'\n') == b'123\n'
assert read_block(f, 0, 3, delimiter=b'\n') == b'123\n'
assert read_block(f, 0, 5, delimiter=b'\n') == b'123\n456\n'
assert read_block(f, 0, 8, delimiter=b'\n') == b'123\n456\n789'
assert read_block(f, 0, 100, delimiter=b'\n') == b'123\n456\n789'
assert read_block(f, 1, 1, delimiter=b'\n') == b''
assert read_block(f, 1, 5, delimiter=b'\n') == b'456\n'
assert read_block(f, 1, 8, delimiter=b'\n') == b'456\n789'
for ols in [[(0, 3), (3, 3), (6, 3), (9, 2)], [(0, 4), (4, 4), (8, 4)]]:
out = [read_block(f, o, l, b'\n') for o, l in ols]
assert b"".join(filter(None, out)) == data
def test_read_block():
delimiter = b"\n"
data = delimiter.join([b"123", b"456", b"789"])
f = io.BytesIO(data)
assert read_block(f, 1, 2) == b"23"
assert read_block(f, 0, 1, delimiter=b"\n") == b"123\n"
assert read_block(f, 0, 2, delimiter=b"\n") == b"123\n"
assert read_block(f, 0, 3, delimiter=b"\n") == b"123\n"
assert read_block(f, 0, 5, delimiter=b"\n") == b"123\n456\n"
assert read_block(f, 0, 8, delimiter=b"\n") == b"123\n456\n789"
assert read_block(f, 0, 100, delimiter=b"\n") == b"123\n456\n789"
assert read_block(f, 1, 1, delimiter=b"\n") == b""
assert read_block(f, 1, 5, delimiter=b"\n") == b"456\n"
assert read_block(f, 1, 8, delimiter=b"\n") == b"456\n789"
for ols in [[(0, 3), (3, 3), (6, 3), (9, 2)], [(0, 4), (4, 4), (8, 4)]]:
out = [read_block(f, o, l, b"\n") for o, l in ols]
assert b"".join(filter(None, out)) == data
def test_read_block():
delimiter = b'\n'
data = delimiter.join([b'123', b'456', b'789'])
f = io.BytesIO(data)
assert read_block(f, 1, 2) == b'23'
assert read_block(f, 0, 1, delimiter=b'\n') == b'123\n'
assert read_block(f, 0, 2, delimiter=b'\n') == b'123\n'
assert read_block(f, 0, 3, delimiter=b'\n') == b'123\n'
assert read_block(f, 0, 5, delimiter=b'\n') == b'123\n456\n'
assert read_block(f, 0, 8, delimiter=b'\n') == b'123\n456\n789'
assert read_block(f, 0, 100, delimiter=b'\n') == b'123\n456\n789'
assert read_block(f, 1, 1, delimiter=b'\n') == b''
assert read_block(f, 1, 5, delimiter=b'\n') == b'456\n'
assert read_block(f, 1, 8, delimiter=b'\n') == b'456\n789'
for ols in [[(0, 3), (3, 3), (6, 3), (9, 2)],
[(0, 4), (4, 4), (8, 4)]]:
out = [read_block(f, o, l, b'\n') for o, l in ols]
assert b"".join(filter(None, out)) == data
