✅ Add first tests for Pydantic v1 in v2

tests/test_pydantic_v1_v2_01.py

@@ -0,0 +1,210 @@
+from typing import Any, List, Union
+
+from fastapi import FastAPI
+from fastapi.testclient import TestClient
+from inline_snapshot import snapshot
+from pydantic.v1 import BaseModel
+
+
+class SubItem(BaseModel):
+    name: str
+
+
+class Item(BaseModel):
+    title: str
+    size: int
+    description: Union[str, None] = None
+    sub: SubItem
+    multi: List[SubItem] = []
+
+
+app = FastAPI()
+
+
+@app.post("/old-simple-model")
+def handle_old_models(data: SubItem) -> SubItem:
+    return data
+
+
+@app.post("/old-simple-model-filter", response_model=SubItem)
+def handle_old_models_filter(data: SubItem) -> Any:
+    extended_data = data.dict()
+    extended_data.update({"secret_price": 42})
+    return extended_data
+
+
+client = TestClient(app)
+
+
+def test_old_simple_model():
+    response = client.post(
+        "/old-simple-model",
+        json={"name": "Foo"},
+    )
+    assert response.status_code == 200, response.text
+    assert response.json() == {"name": "Foo"}
+
+
+def test_old_simple_model_validation_error():
+    response = client.post(
+        "/old-simple-model",
+        json={"wrong_name": "Foo"},
+    )
+    assert response.status_code == 422, response.text
+    assert response.json() == snapshot(
+        {
+            "detail": [
+                {
+                    "loc": ["body", "name"],
+                    "msg": "field required",
+                    "type": "value_error.missing",
+                }
+            ]
+        }
+    )
+
+
+def test_old_simple_model_filter():
+    response = client.post(
+        "/old-simple-model-filter",
+        json={"name": "Foo"},
+    )
+    assert response.status_code == 200, response.text
+    assert response.json() == {"name": "Foo"}
+
+
+def test_openapi_schema():
+    response = client.get("/openapi.json")
+    assert response.status_code == 200, response.text
+    assert response.json() == snapshot(
+        {
+            "openapi": "3.1.0",
+            "info": {"title": "FastAPI", "version": "0.1.0"},
+            "paths": {
+                "/old-simple-model": {
+                    "post": {
+                        "summary": "Handle Old Models",
+                        "operationId": "handle_old_models_old_simple_model_post",
+                        "requestBody": {
+                            "content": {
+                                "application/json": {
+                                    "schema": {
+                                        "allOf": [
+                                            {"$ref": "#/components/schemas/SubItem"}
+                                        ],
+                                        "title": "Data",
+                                    }
+                                }
+                            },
+                            "required": True,
+                        },
+                        "responses": {
+                            "200": {
+                                "description": "Successful Response",
+                                "content": {
+                                    "application/json": {
+                                        "schema": {
+                                            "$ref": "#/components/schemas/SubItem"
+                                        }
+                                    }
+                                },
+                            },
+                            "422": {
+                                "description": "Validation Error",
+                                "content": {
+                                    "application/json": {
+                                        "schema": {
+                                            "$ref": "#/components/schemas/HTTPValidationError"
+                                        }
+                                    }
+                                },
+                            },
+                        },
+                    }
+                },
+                "/old-simple-model-filter": {
+                    "post": {
+                        "summary": "Handle Old Models Filter",
+                        "operationId": "handle_old_models_filter_old_simple_model_filter_post",
+                        "requestBody": {
+                            "content": {
+                                "application/json": {
+                                    "schema": {
+                                        "allOf": [
+                                            {"$ref": "#/components/schemas/SubItem"}
+                                        ],
+                                        "title": "Data",
+                                    }
+                                }
+                            },
+                            "required": True,
+                        },
+                        "responses": {
+                            "200": {
+                                "description": "Successful Response",
+                                "content": {
+                                    "application/json": {
+                                        "schema": {
+                                            "$ref": "#/components/schemas/SubItem"
+                                        }
+                                    }
+                                },
+                            },
+                            "422": {
+                                "description": "Validation Error",
+                                "content": {
+                                    "application/json": {
+                                        "schema": {
+                                            "$ref": "#/components/schemas/HTTPValidationError"
+                                        }
+                                    }
+                                },
+                            },
+                        },
+                    }
+                },
+            },
+            "components": {
+                "schemas": {
+                    "HTTPValidationError": {
+                        "properties": {
+                            "detail": {
+                                "items": {
+                                    "$ref": "#/components/schemas/ValidationError"
+                                },
+                                "type": "array",
+                                "title": "Detail",
+                            }
+                        },
+                        "type": "object",
+                        "title": "HTTPValidationError",
+                    },
+                    "SubItem": {
+                        "properties": {"name": {"type": "string", "title": "Name"}},
+                        "type": "object",
+                        "required": ["name"],
+                        "title": "SubItem",
+                    },
+                    "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",
+                    },
+                }
+            },
+        }
+    )
+
+
+# test_openapi_schema()