US05-04: Verify, Retry, and Resolve Uncertain Uploads (#74)

tests/unit/test_immich_bulk_check.py

@@ -0,0 +1,27 @@
+"""How one bulk-upload-check result is read (US05-04).
+
+Only a duplicate rejection proves Immich holds the bytes. Every other answer — a
+rejection for another reason, an action this adapter does not know — must stay
+uncertain, because "the server did not say yes" is not "the file is not there".
+"""
+
+from photo_pipeline.integrations.immich_go import _holds_bytes, bulk_upload_check
+
+
+def test_a_duplicate_rejection_is_the_only_proof_of_possession():
+    assert _holds_bytes({"action": "reject", "reason": "duplicate"}) is True
+    assert _holds_bytes({"action": "accept"}) is False
+
+
+def test_any_other_answer_is_uncertain_never_absent():
+    assert _holds_bytes({"action": "reject", "reason": "unsupported-format"}) is None
+    assert _holds_bytes({"action": "quarantine"}) is None
+    assert _holds_bytes({}) is None
+
+
+def test_missing_credentials_are_reported_not_silently_treated_as_absence():
+    result = bulk_upload_check("", None, {"asset": "abc"})
+
+    assert result["reachable"] is False
+    assert result["present"] == {}
+    assert "credentials" in result["detail"]