text: import pytest
  from fastapi.testclient import TestClient
  
  from ...utils import needs_py39
  
  openapi_schema = {
      "openapi": "3.0.2",
      "info": {"title": "FastAPI", "version": "0.1.0"},
      "paths": {
          "/items/{item_id}": {
              "get": {
                  "responses": {
                      "200": {
                          "description": "Successful Response",
                          "content": {
                              "application/json": {
                                  "schema": {"$ref": "#/components/schemas/Item"}
                              }
                          },
                      },
                      "422": {
                          "description": "Validation Error",
                          "content": {
                              "application/json": {
                                  "schema": {
                                      "$ref": "#/components/schemas/HTTPValidationError"
                                  }
                              }
                          },
                      },
                  },
                  "summary": "Read Item",
                  "operationId": "read_item_items__item_id__get",
                  "parameters": [
                      {
                          "required": True,
                          "schema": {"title": "Item Id", "type": "string"},
                          "name": "item_id",
                          "in": "path",
                      }
                  ],
              }
          }
      },
      "components": {
          "schemas": {
              "Item": {
                  "title": "Item",
                  "required": ["name", "price"],
                  "type": "object",
                  "properties": {
                      "name": {"title": "Name", "type": "string"},
                      "price": {"title": "Price", "type": "number"},
                      "description": {"title": "Description", "type": "string"},
                      "tax": {"title": "Tax", "type": "number", "default": 10.5},
                      "tags": {
                          "title": "Tags",
                          "type": "array",
                          "items": {"type": "string"},
                          "default": [],
                      },
                  },
              },
              "ValidationError": {
                  "title": "ValidationError",
                  "required": ["loc", "msg", "type"],
                  "type": "object",
                  "properties": {
                      "loc": {
                          "title": "Location",
                          "type": "array",
                          "items": {"anyOf": [{"type": "string"}, {"type": "integer"}]},
                      },
                      "msg": {"title": "Message", "type": "string"},
                      "type": {"title": "Error Type", "type": "string"},
                  },
              },
              "HTTPValidationError": {
                  "title": "HTTPValidationError",
                  "type": "object",
                  "properties": {
                      "detail": {
                          "title": "Detail",
                          "type": "array",
                          "items": {"$ref": "#/components/schemas/ValidationError"},
                      }
                  },
              },
          }
      },
  }
  
  
  @pytest.fixture(name="client")
  def get_client():
      from docs_src.response_model.tutorial004_py39 import app
  
      client = TestClient(app)
      return client
  
  
  @needs_py39
  def test_openapi_schema(client: TestClient):
      response = client.get("/openapi.json")
      assert response.status_code == 200, response.text
      assert response.json() == openapi_schema
  
  
  @needs_py39
  @pytest.mark.parametrize(
      "url,data",
      [
          ("/items/foo", {"name": "Foo", "price": 50.2}),
          (
              "/items/bar",
              {"name": "Bar", "description": "The bartenders", "price": 62, "tax": 20.2},
          ),
          (
              "/items/baz",
              {
                  "name": "Baz",
                  "description": None,
                  "price": 50.2,
                  "tax": 10.5,
                  "tags": [],
              },
          ),
      ],
  )
  def test_get(url, data, client: TestClient):
      response = client.get(url)
      assert response.status_code == 200, response.text
      assert response.json() == data
  