✅ Add tests for required nonable parameters and body fields (#4907)

tests/test_required_noneable.py

@@ -0,0 +1,62 @@
+from typing import Union
+
+from fastapi import Body, FastAPI, Query
+from fastapi.testclient import TestClient
+
+app = FastAPI()
+
+
+@app.get("/query")
+def read_query(q: Union[str, None]):
+    return q
+
+
+@app.get("/explicit-query")
+def read_explicit_query(q: Union[str, None] = Query()):
+    return q
+
+
+@app.post("/body-embed")
+def send_body_embed(b: Union[str, None] = Body(embed=True)):
+    return b
+
+
+client = TestClient(app)
+
+
+def test_required_nonable_query_invalid():
+    response = client.get("/query")
+    assert response.status_code == 422
+
+
+def test_required_noneable_query_value():
+    response = client.get("/query", params={"q": "foo"})
+    assert response.status_code == 200
+    assert response.json() == "foo"
+
+
+def test_required_nonable_explicit_query_invalid():
+    response = client.get("/explicit-query")
+    assert response.status_code == 422
+
+
+def test_required_nonable_explicit_query_value():
+    response = client.get("/explicit-query", params={"q": "foo"})
+    assert response.status_code == 200
+    assert response.json() == "foo"
+
+
+def test_required_nonable_body_embed_no_content():
+    response = client.post("/body-embed")
+    assert response.status_code == 422
+
+
+def test_required_nonable_body_embed_invalid():
+    response = client.post("/body-embed", json={"invalid": "invalid"})
+    assert response.status_code == 422
+
+
+def test_required_noneable_body_embed_value():
+    response = client.post("/body-embed", json={"b": "foo"})
+    assert response.status_code == 200
+    assert response.json() == "foo"