feat: start mailbox evidence scanner

tests/test_scanner.py

@@ -0,0 +1,37 @@
+from __future__ import annotations
+
+import tempfile
+import unittest
+from pathlib import Path
+
+from email_connect.config import AppConfig, MailboxConfig, ReportsConfig, ScanConfig, SourceConfig, StorageConfig
+from email_connect.scanner import scan_mailbox
+
+
+FIXTURES = Path(__file__).parent / "fixtures" / "mailbox"
+
+
+class ScannerTests(unittest.TestCase):
+    def test_scan_fixture_directory_writes_report_and_deduplicates(self) -> None:
+        with tempfile.TemporaryDirectory() as tmp:
+            root = Path(tmp)
+            config = AppConfig(
+                mailbox=MailboxConfig(id="test-mailbox", protocol="fixture"),
+                scan=ScanConfig(),
+                storage=StorageConfig(path=str(root / "state.sqlite")),
+                reports=ReportsConfig(output_dir=str(root / "reports")),
+                source=SourceConfig(fixture_dir=str(FIXTURES)),
+            )
+            first = scan_mailbox(config)
+            second = scan_mailbox(config)
+
+            self.assertEqual(first.scan.messages_seen, 4)
+            self.assertEqual(first.scan.messages_new, 4)
+            self.assertGreaterEqual(first.scan.evidence_events_created, 4)
+            self.assertEqual(second.scan.messages_new, 0)
+            self.assertEqual(second.scan.evidence_events_created, 0)
+            self.assertTrue(first.report_path and first.report_path.exists())
+
+
+if __name__ == "__main__":
+    unittest.main()