Step 5 implemented

tests/test_app.py

@@ -0,0 +1,75 @@
+"""Tests for transcription.app."""
+
+import pytest
+from fastapi import FastAPI
+from fastapi.testclient import TestClient
+
+from transcription.app import create_app
+
+
+@pytest.mark.unit
+class TestAppFactory:
+    """Verify FastAPI app factory wiring."""
+
+    def test_create_app_returns_fastapi_instance(self):
+        """create_app returns a FastAPI application instance."""
+        app = create_app()
+        assert isinstance(app, FastAPI)
+
+
+@pytest.mark.integration
+class TestAppLifespan:
+    """Verify startup and shutdown lifecycle behavior."""
+
+    def test_startup_initializes_runtime_dependencies(self, monkeypatch):
+        """Startup initializes logging, schema, directories, and worker resources."""
+        calls = []
+
+        monkeypatch.setattr("transcription.app.setup_logging", lambda: calls.append("logging"))
+        monkeypatch.setattr("transcription.app.create_all", lambda: calls.append("schema"))
+        monkeypatch.setattr("transcription.app._start_worker", lambda _app: calls.append("start_worker"))
+        monkeypatch.setattr("transcription.app._stop_worker", lambda _app: calls.append("stop_worker"))
+
+        class _Dir:
+            def mkdir(self, parents: bool, exist_ok: bool):
+                calls.append("mkdir")
+
+        class _Settings:
+            upload_dir = _Dir()
+            prompt_dir = _Dir()
+
+        monkeypatch.setattr("transcription.app.get_settings", lambda: _Settings())
+
+        app = create_app()
+        with TestClient(app):
+            pass
+
+        assert "logging" in calls
+        assert "schema" in calls
+        assert "mkdir" in calls
+        assert "start_worker" in calls
+
+    def test_shutdown_stops_worker_resources(self, monkeypatch):
+        """Shutdown signals and stops worker resources cleanly."""
+        calls = []
+
+        monkeypatch.setattr("transcription.app.setup_logging", lambda: None)
+        monkeypatch.setattr("transcription.app.create_all", lambda: None)
+        monkeypatch.setattr("transcription.app._start_worker", lambda _app: calls.append("start_worker"))
+        monkeypatch.setattr("transcription.app._stop_worker", lambda _app: calls.append("stop_worker"))
+
+        class _Dir:
+            def mkdir(self, parents: bool, exist_ok: bool):
+                return None
+
+        class _Settings:
+            upload_dir = _Dir()
+            prompt_dir = _Dir()
+
+        monkeypatch.setattr("transcription.app.get_settings", lambda: _Settings())
+
+        app = create_app()
+        with TestClient(app):
+            pass
+
+        assert calls == ["start_worker", "stop_worker"]