mirror of https://github.com/tiangolo/fastapi.git
155 lines
4.2 KiB
Python
155 lines
4.2 KiB
Python
from dirty_equals import IsDict
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from fastapi import FastAPI
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from fastapi.testclient import TestClient
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from pydantic import BaseModel
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app = FastAPI()
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class Item(BaseModel):
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name: str
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price: float
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description: str = None
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@app.post("/items/")
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async def create_item(item: Item):
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return item
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client = TestClient(app)
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def test_json_decode_error_single_line():
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response = client.post(
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"/items/",
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content='{"name": "Test", "price": None}',
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headers={"Content-Type": "application/json"},
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)
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assert response.status_code == 422
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error = response.json()["detail"][0]
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assert error["loc"] == ["body", 1, 27]
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assert "line 1" in error["msg"]
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assert "column 27" in error["msg"]
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assert error["ctx"]["line"] == 1
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assert error["ctx"]["column"] == 27
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assert "None" in error["input"]
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def test_json_decode_error_multiline():
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invalid_json = """
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{
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"name": "Test",
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"price": 'invalid'
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}"""
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response = client.post(
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"/items/", content=invalid_json, headers={"Content-Type": "application/json"}
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)
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assert response.status_code == 422
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error = response.json()["detail"][0]
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assert error["loc"] == ["body", 4, 12]
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assert "line 4" in error["msg"]
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assert "column 12" in error["msg"]
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assert error["ctx"]["line"] == 4
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assert error["ctx"]["column"] == 12
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assert "invalid" in error["input"]
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def test_json_decode_error_shows_snippet():
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long_json = '{"very_long_field_name_here": "some value", "another_field": invalid}'
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response = client.post(
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"/items/", content=long_json, headers={"Content-Type": "application/json"}
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)
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assert response.status_code == 422
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error = response.json()["detail"][0]
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assert "..." in error["input"]
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assert "invalid" in error["input"]
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assert len(error["input"]) <= 83
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def test_json_decode_error_empty_body():
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response = client.post(
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"/items/", content="", headers={"Content-Type": "application/json"}
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)
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assert response.status_code == 422
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# Handle both Pydantic v1 and v2 - empty body is handled differently
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assert response.json() == IsDict(
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{
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"detail": [
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{
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"loc": ["body"],
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"msg": "Field required",
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"type": "missing",
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"input": None,
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}
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]
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}
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) | IsDict(
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# Pydantic v1
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{
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"detail": [
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{
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"loc": ["body"],
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"msg": "field required",
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"type": "value_error.missing",
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}
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]
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}
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)
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def test_json_decode_error_unclosed_brace():
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response = client.post(
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"/items/",
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content='{"name": "Test"',
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headers={"Content-Type": "application/json"},
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)
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assert response.status_code == 422
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error = response.json()["detail"][0]
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assert "line" in error["msg"].lower()
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assert "column" in error["msg"].lower()
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assert error["type"] == "json_invalid"
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assert "position" in error["ctx"]
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def test_json_decode_error_in_middle_of_long_document():
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# Create a JSON with error early in a long document (need >40 chars after error)
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# The error is at position for "invalid" which needs at least 41 chars after it
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long_json = '{"field": invalid, "padding_field": "this needs to be long enough that we have more than forty characters after the error position"}'
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response = client.post(
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"/items/", content=long_json, headers={"Content-Type": "application/json"}
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)
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assert response.status_code == 422
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error = response.json()["detail"][0]
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# The error snippet should have "..." at the end since error is early in doc
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assert error["input"].endswith("...")
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assert "invalid" in error["input"]
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assert error["type"] == "json_invalid"
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def test_successful_item_creation():
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response = client.post(
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"/items/",
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json={"name": "Test Item", "price": 19.99, "description": "A test item"},
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)
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assert response.status_code == 200
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data = response.json()
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assert data["name"] == "Test Item"
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assert data["price"] == 19.99
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assert data["description"] == "A test item"
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