#!/usr/bin/env python3
"""Pure unit test for the empty-My-Packs store resolver guard in autopatch.py.

Covers the fail-closed guard decision (original -> PATCH, already-patched -> NOOP,
unknown -> SKIP) and pins the guarded patch table to the exact RVA/bytes proven on
the tested FIFA 17 build (JNZ 0x14869 -> JG 0x14869 at CardsDLL RVA 0x14858).

Run: python3 test_autopatch_guard.py
"""
import os
import sys

sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
import autopatch  # importable: runtime loop is guarded by `if __name__ == "__main__"`

GUARD_VA = 0x180014858
ORIG = bytes.fromhex("750f")   # JNZ 0x14869
PATCH = bytes.fromhex("7f0f")  # JG  0x14869


def test_table_exact():
    assert autopatch.STORE_PATCHES_GUARDED == {GUARD_VA: (ORIG, PATCH)}, \
        autopatch.STORE_PATCHES_GUARDED
    # Byte-level pin so a bad hex literal cannot slip through.
    assert ORIG == b"\x75\x0f" and PATCH == b"\x7f\x0f"


def test_decision():
    assert autopatch.guarded_action(ORIG, ORIG, PATCH) == "patch"   # apply
    assert autopatch.guarded_action(PATCH, ORIG, PATCH) == "noop"   # already patched
    assert autopatch.guarded_action(b"\x00\x00", ORIG, PATCH) == "skip"  # build mismatch
    assert autopatch.guarded_action(b"\x90", ORIG, PATCH) == "skip"      # wrong length


if __name__ == "__main__":
    test_table_exact()
    test_decision()
    print("OK: autopatch guard table + fail-closed decision (PATCH/NOOP/SKIP)")