Sync fastapi docs from b5ca1324 on 2025-12-07

tests/test_tutorial/test_cors/test_tutorial001.py

@@ -0,0 +1,37 @@
+from fastapi.testclient import TestClient
+
+from docs_src.cors.tutorial001 import app
+
+
+def test_cors():
+    client = TestClient(app)
+    # Test pre-flight response
+    headers = {
+        "Origin": "https://localhost.tiangolo.com",
+        "Access-Control-Request-Method": "GET",
+        "Access-Control-Request-Headers": "X-Example",
+    }
+    response = client.options("/", headers=headers)
+    assert response.status_code == 200, response.text
+    assert response.text == "OK"
+    assert (
+        response.headers["access-control-allow-origin"]
+        == "https://localhost.tiangolo.com"
+    )
+    assert response.headers["access-control-allow-headers"] == "X-Example"
+
+    # Test standard response
+    headers = {"Origin": "https://localhost.tiangolo.com"}
+    response = client.get("/", headers=headers)
+    assert response.status_code == 200, response.text
+    assert response.json() == {"message": "Hello World"}
+    assert (
+        response.headers["access-control-allow-origin"]
+        == "https://localhost.tiangolo.com"
+    )
+
+    # Test non-CORS response
+    response = client.get("/")
+    assert response.status_code == 200, response.text
+    assert response.json() == {"message": "Hello World"}
+    assert "access-control-allow-origin" not in response.headers