def test_reduce_keyval():
ctx = Qit()
kv = KeyValue(Int(), Int())
values = ((12, 3), (17, 1), (5, 0), (12, 4), (2, 0))
a = kv.values(*values).iterate().reduce(kv.max_fn)
b = kv.values(*values).iterate().reduce(kv.min_fn)
result = ctx.run((Struct(kv, kv)).value((a, b)))
assert ((12, 4), (5, 0)) == result
