"""Unit tests for KQCache."""
import torch
import sys
import os

sys.path.insert(0, os.path.join(os.path.dirname(__file__), "..", ".."))

from arbitor.attention.kq_cache import KQCache


def test_kqc_append_peek():
    kq = KQCache(8)
    kq.append(42)
    assert kq.peek().tolist() == [42]
    kq.append(99)
    assert kq.peek(2).tolist() == [42, 99]
    print(" PASS test_kqc_append_peek")


def test_kqc_wrap():
    kq = KQCache(4)
    for i in range(6):
        kq.append(i)
    assert kq.peek(3).tolist() == [3, 4, 5], f"got {kq.peek(3).tolist()}"
    print(" PASS test_kqc_wrap")


def test_kqc_peek_order():
    kq = KQCache(4)
    for i in range(6):
        kq.append(i)
    all_vals = kq.peek(4)
    assert all_vals.tolist() == [2, 3, 4, 5], f"got {all_vals.tolist()}"
    print(" PASS test_kqc_peek_order")


def test_kqc_empty():
    kq = KQCache(8)
    assert kq.peek(3).numel() == 0
    assert kq.size == 0
    print(" PASS test_kqc_empty")


def test_kqc_reset():
    kq = KQCache(8)
    kq.append(1)
    kq.append(2)
    kq.reset()
    assert kq.size == 0
    assert kq.peek().numel() == 0
    print(" PASS test_kqc_reset")


if __name__ == "__main__":
    test_kqc_append_peek()
    test_kqc_wrap()
    test_kqc_peek_order()
    test_kqc_empty()
    test_kqc_reset()
    print("\nAll KQ cache tests PASS")