✨ Add support for BackgroundTasks parameters (#103)

* ✨ Add support for BackgroundTasks parameters

* 🐛 Fix type declaration in dependencies

* 🐛 Fix coverage of util in tests

tests/test_tutorial/test_background_tasks/test_tutorial001.py

@@ -0,0 +1,19 @@
+import os
+from pathlib import Path
+
+from starlette.testclient import TestClient
+
+from background_tasks.tutorial001 import app
+
+client = TestClient(app)
+
+
+def test():
+    log = Path("log.txt")
+    if log.is_file():
+        os.remove(log)  # pragma: no cover
+    response = client.post("/send-notification/foo@example.com")
+    assert response.status_code == 200
+    assert response.json() == {"message": "Notification sent in the background"}
+    with open("./log.txt") as f:
+        assert "notification for foo@example.com: some notification" in f.read()

tests/test_tutorial/test_background_tasks/test_tutorial002.py

@@ -0,0 +1,19 @@
+import os
+from pathlib import Path
+
+from starlette.testclient import TestClient
+
+from background_tasks.tutorial002 import app
+
+client = TestClient(app)
+
+
+def test():
+    log = Path("log.txt")
+    if log.is_file():
+        os.remove(log)  # pragma: no cover
+    response = client.post("/send-notification/foo@example.com?q=some-query")
+    assert response.status_code == 200
+    assert response.json() == {"message": "Message sent"}
+    with open("./log.txt") as f:
+        assert "found query: some-query\nmessage to foo@example.com" in f.read()