# Author: Sandeep Belgavi
import tempfile
import unittest
from pathlib import Path
from pattern_09 import ApprovalStore, ProposalAdapter, demo

class ApprovalTests(unittest.TestCase):
    def setUp(self):
        self.tmp = tempfile.TemporaryDirectory(); self.path = Path(self.tmp.name) / 'state.db'
        self.store = ApprovalStore(self.path); self.action = ProposalAdapter().propose()
        self.store.request('a', self.action, 'v1', 'reviewer', 20)
    def tearDown(self): self.store.close(); self.tmp.cleanup()
    def approve(self): return self.store.decide('a', 'reviewer', self.action, 'v1', 10)
    def test_wrong_identity(self):
        with self.assertRaises(PermissionError): self.store.decide('a', 'attacker', self.action, 'v1', 10)
    def test_changed_action(self):
        with self.assertRaises(ValueError): self.store.decide('a', 'reviewer', dict(self.action, target='other'), 'v1', 10)
    def test_stale_revision(self):
        with self.assertRaises(ValueError): self.store.decide('a', 'reviewer', self.action, 'v2', 10)
    def test_expiry(self):
        with self.assertRaises(ValueError): self.store.decide('a', 'reviewer', self.action, 'v1', 20)
    def test_single_consumption(self):
        self.approve(); self.store.consume('a', self.action, 'v1', 11)
        with self.assertRaises(PermissionError): self.store.consume('a', self.action, 'v1', 12)
    def test_rejection(self):
        self.store.decide('a', 'reviewer', self.action, 'v1', 10, False)
        with self.assertRaises(PermissionError): self.store.consume('a', self.action, 'v1', 11)
    def test_pending_restart(self):
        self.store.close(); self.store = ApprovalStore(self.path)
        self.assertEqual(self.approve(), 'approved')
    def test_expiry_after_approval(self):
        self.approve()
        with self.assertRaises(PermissionError): self.store.consume('a', self.action, 'v1', 20)
    def test_duplicate_decision(self):
        self.approve()
        with self.assertRaises(ValueError): self.approve()
    def test_demo(self): self.assertEqual(demo()['dispatch'], 'local-marker')

if __name__ == '__main__': unittest.main()