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from fastapi import FastAPI, Form
from fastapi.testclient import TestClient
from typing_extensions import Annotated
app = FastAPI()
@app.post("/form/")
def post_form(username: Annotated[str, Form()]):
return username
client = TestClient(app)
def test_single_form_field():
response = client.post("/form/", data={"username": "Rick"})
assert response.status_code == 200, response.text
assert response.json() == "Rick"
def test_openapi_schema():
response = client.get("/openapi.json")
assert response.status_code == 200, response.text
assert response.json() == {
"openapi": "3.1.0",
"info": {"title": "FastAPI", "version": "0.1.0"},
"paths": {
"/form/": {
"post": {
"summary": "Post Form",
"operationId": "post_form_form__post",
"requestBody": {
"content": {
"application/x-www-form-urlencoded": {
"schema": {
"$ref": "#/components/schemas/Body_post_form_form__post"
}
}
},
"required": True,
},
"responses": {
"200": {
"description": "Successful Response",
"content": {"application/json": {"schema": {}}},
},
"422": {
"description": "Validation Error",
"content": {
"application/json": {
"schema": {
"$ref": "#/components/schemas/HTTPValidationError"
}
}
},
},
},
}
}
},
"components": {
"schemas": {
"Body_post_form_form__post": {
"properties": {"username": {"type": "string", "title": "Username"}},
"type": "object",
"required": ["username"],
"title": "Body_post_form_form__post",
},
"HTTPValidationError": {
"properties": {
"detail": {
"items": {"$ref": "#/components/schemas/ValidationError"},
"type": "array",
"title": "Detail",
}
},
"type": "object",
"title": "HTTPValidationError",
},
"ValidationError": {
"properties": {
"loc": {
"items": {
"anyOf": [{"type": "string"}, {"type": "integer"}]
},
"type": "array",
"title": "Location",
},
"msg": {"type": "string", "title": "Message"},
"type": {"type": "string", "title": "Error Type"},
},
"type": "object",
"required": ["loc", "msg", "type"],
"title": "ValidationError",
},
}
},
}
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