✨ Add support for Response parameters to set headers, cookies, and status codes (#294)

* ✨ Add support for declaring a Response parameter to set headers and cookies

* ✅ Add source for docs and tests

* 📝 Add docs for setting headers, cookies and status code

* 📝 Add attribution to Hug for inspiring response parameters

tests/test_tutorial/test_response_change_status_code/test_tutorial001.py

@@ -0,0 +1,15 @@
+from starlette.testclient import TestClient
+
+from response_change_status_code.tutorial001 import app
+
+client = TestClient(app)
+
+
+def test_path_operation():
+    response = client.put("/get-or-create-task/foo")
+    print(response.content)
+    assert response.status_code == 200
+    assert response.json() == "Listen to the Bar Fighters"
+    response = client.put("/get-or-create-task/bar")
+    assert response.status_code == 201
+    assert response.json() == "This didn't exist before"

tests/test_tutorial/test_response_cookies/test_tutorial002.py

@@ -0,0 +1,12 @@
+from starlette.testclient import TestClient
+
+from response_cookies.tutorial002 import app
+
+client = TestClient(app)
+
+
+def test_path_operation():
+    response = client.post("/cookie-and-object/")
+    assert response.status_code == 200
+    assert response.json() == {"message": "Come to the dark side, we have cookies"}
+    assert response.cookies["fakesession"] == "fake-cookie-session-value"

tests/test_tutorial/test_response_headers/test_tutorial002.py

@@ -0,0 +1,12 @@
+from starlette.testclient import TestClient
+
+from response_headers.tutorial002 import app
+
+client = TestClient(app)
+
+
+def test_path_operation():
+    response = client.get("/headers-and-object/")
+    assert response.status_code == 200
+    assert response.json() == {"message": "Hello World"}
+    assert response.headers["X-Cat-Dog"] == "alone in the world"