🐛 Allow_inf_nan option for Param subclasses

fastapi/params.py

@@ -91,7 +91,7 @@ def __init__(
             max_length=max_length,
             discriminator=discriminator,
             multiple_of=multiple_of,
-            allow_nan=allow_inf_nan,
+            allow_inf_nan=allow_inf_nan,
             max_digits=max_digits,
             decimal_places=decimal_places,
             **extra,

test_param_allow_inf_nan.py

@@ -0,0 +1,61 @@
+from typing import Optional
+
+from fastapi import FastAPI
+from fastapi.params import Query
+from fastapi.testclient import TestClient
+
+app = FastAPI()
+
+
+@app.get("/")
+def get(
+    x: Optional[float] = Query(default=0, allow_inf_nan=False),
+    y: Optional[float] = Query(default=0, allow_inf_nan=True),
+    z: Optional[float] = Query(default=0),
+) -> str:  # type: ignore
+    return "OK"
+
+
+client = TestClient(app)
+
+
+def test_allow_inf_nan_false():
+    response = client.get("/?x=inf")
+    assert response.status_code == 422, response.text
+
+    response = client.get("/?x=-inf")
+    assert response.status_code == 422, response.text
+
+    response = client.get("/?x=nan")
+    assert response.status_code == 422, response.text
+
+    response = client.get("/?x=0")
+    assert response.status_code == 200, response.text
+
+
+def test_allow_inf_nan_true():
+    response = client.get("/?y=inf")
+    assert response.status_code == 200, response.text
+
+    response = client.get("/?y=-inf")
+    assert response.status_code == 200, response.text
+
+    response = client.get("/?y=nan")
+    assert response.status_code == 200, response.text
+
+    response = client.get("/?y=0")
+    assert response.status_code == 200, response.text
+
+
+def test_allow_inf_nan_not_specified():
+    response = client.get("/?z=inf")
+    assert response.status_code == 200, response.text
+
+    response = client.get("/?z=-inf")
+    assert response.status_code == 200, response.text
+
+    response = client.get("/?z=nan")
+    assert response.status_code == 200, response.text
+
+    response = client.get("/?z=0")
+    assert response.status_code == 200, response.text