pythonasyncioapiasyncfastapiframeworkjsonjson-schemaopenapiopenapi3pydanticpython-typespython3redocreststarletteswaggerswagger-uiuvicornweb
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104 lines
3.3 KiB
104 lines
3.3 KiB
"""
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Test for issue #13533: Multiple regressions in the handling of forms & form validation
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This test verifies that empty strings in form fields are correctly handled:
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- For optional fields with None default, empty string should result in None
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- For optional fields with int type, empty string should result in None (not parsing error)
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- This applies to both x-www-form-urlencoded and multipart/form-data
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"""
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from typing import Optional
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from fastapi import FastAPI, File, Form
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from fastapi.testclient import TestClient
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from typing_extensions import Annotated
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# Test app for URL-encoded forms with optional string
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app_urlencoded_str = FastAPI()
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@app_urlencoded_str.post("/test")
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def endpoint_urlencoded_str(
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name: Annotated[Optional[str], Form(embed=True)] = None,
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):
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return {"name": name}
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# Test app for URL-encoded forms with optional int
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app_urlencoded_int = FastAPI()
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@app_urlencoded_int.post("/test")
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def endpoint_urlencoded_int(
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age: Annotated[Optional[int], Form()] = None,
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):
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return {"age": age}
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# Test app for multipart forms
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app_multipart = FastAPI()
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@app_multipart.post("/test")
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def endpoint_multipart(
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file: Annotated[Optional[bytes], File()] = None,
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name: Annotated[Optional[str], Form(embed=True)] = None,
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):
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return {"file_size": len(file) if file else None, "name": name}
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def test_urlencoded_empty_string_optional_str():
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"""
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Regression test for #13533: Empty string in URL-encoded form
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with optional str field should use default value (None)
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"""
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client = TestClient(app_urlencoded_str)
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response = client.post("/test", data={"name": ""})
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assert response.status_code == 200
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assert response.json() == {"name": None}
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def test_urlencoded_empty_string_optional_int():
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"""
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Regression test for #13533: Empty string in URL-encoded form
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with optional int field should use default value (None), not cause parsing error
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"""
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client = TestClient(app_urlencoded_int)
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response = client.post("/test", data={"age": ""})
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assert response.status_code == 200
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assert response.json() == {"age": None}
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def test_multipart_empty_string_optional_str():
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"""
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Regression test for #13533: Empty string in multipart form
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with optional str field should use default value (None)
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"""
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client = TestClient(app_multipart)
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response = client.post("/test", data={"name": ""})
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assert response.status_code == 200
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assert response.json() == {"file_size": None, "name": None}
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def test_urlencoded_with_actual_value():
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"""Verify that actual values still work correctly"""
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client = TestClient(app_urlencoded_str)
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response = client.post("/test", data={"name": "John"})
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assert response.status_code == 200
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assert response.json() == {"name": "John"}
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def test_urlencoded_int_with_actual_value():
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"""Verify that actual int values still work correctly"""
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client = TestClient(app_urlencoded_int)
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response = client.post("/test", data={"age": "25"})
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assert response.status_code == 200
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assert response.json() == {"age": 25}
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def test_multipart_with_actual_value():
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"""Verify that actual values in multipart forms still work correctly"""
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client = TestClient(app_multipart)
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response = client.post("/test", data={"name": "John"})
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assert response.status_code == 200
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assert response.json() == {"file_size": None, "name": "John"}
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