"application/json": {
                                "schema": {"$ref": "#/components/schemas/Item"}
                            }
                        },
                        "required": True,
                    },
                }
            }
        },
        "components": {
            "schemas": {
                "Item": {
                    "title": "Item",

    """
    response = client.get("/openapi.json")
    assert response.status_code == 200, response.text
    assert response.json() == snapshot(
        {
            "components": {
                "schemas": {
                    "Address": {
                        # NOTE: the description of this model shows only the public-facing text, before the `\f` in docstring

                            "content": {
                                "application/json": {
                                    "schema": {
                                        "$ref": "#/components/schemas/HTTPValidationError"
                                    }
                                }
                            },
                        },
                    },

        "/optional-uploadfile",
    ],
)
def test_optional_schema(path: str):
    openapi = app.openapi()
    body_model_name = get_body_model_name(openapi, path)

    assert app.openapi()["components"]["schemas"][body_model_name] == {
        "properties": {
            "p": {
                "anyOf": [
                    {"type": "string", "format": "binary"},
                    {"type": "null"},

    "path",
    ["/optional-str", "/model-optional-str"],
)
def test_optional_str_schema(path: str):
    openapi = app.openapi()
    body_model_name = get_body_model_name(openapi, path)

    assert app.openapi()["components"]["schemas"][body_model_name] == {
        "properties": {
            "p": {
                "anyOf": [{"type": "string"}, {"type": "null"}],
                "title": "P",
            },
        },

                                    "$ref": "#/components/schemas/Body_update_item_items__item_id__put"
                                }
                            }
                        },
                        "required": True,
                    },
                }
            }
        },
        "components": {
            "schemas": {
                "Item": {

                            "content": {
                                "application/json": {
                                    "schema": {
                                        "$ref": "#/components/schemas/HTTPValidationError"
                                    }
                                }
                            },
                        },
                    },

                                    "$ref": "#/components/schemas/Body_update_item_items__item_id__put"
                                }
                            }
                        },
                        "required": True,
                    },
                }
            }
        },
        "components": {
            "schemas": {
                "Item": {

                },
            },
        },
        "components": {
            "schemas": {
                "HTTPValidationError": {
                    "properties": {
                        "detail": {
                            "items": {
                                "$ref": "#/components/schemas/ValidationError",
                            },
                            "title": "Detail",

                                        "schema": {"$ref": "#/components/schemas/Item"}
                                    }
                                },
                            }
                        },
                    }
                }
            },
            "components": {
                "schemas": {
                    "Item": {
                        "title": "Item",