def test_sort(self):
t = Table([
Record(x=1, y=2, z=3),
Record(x=1, y=2, z=4),
Record(x=2, y=1, z=3),
Record(x=3, y=3, z=4),
Record(x=2, y=2, z=3),
Record(x=1, y=2, z=3),
])
t.key_sort(['x'])
assert t == Table([
Record(x=1, y=2, z=3),
Record(x=1, y=2, z=4),
Record(x=1, y=2, z=3),
Record(x=2, y=1, z=3),
Record(x=2, y=2, z=3),
Record(x=3, y=3, z=4),
])
assert type(t) is Table
