["/optional-str", "/model-optional-str"],
)
def test_optional_str_schema(path: str):
    assert app.openapi()["paths"][path]["get"]["parameters"] == [
        {
            "required": False,
            "schema": {
                "anyOf": [{"type": "string"}, {"type": "null"}],
                "title": "P",
            },
            "name": "p",
            "in": "cookie",
        }
    ]

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

The schemas are referenced to another place inside the OpenAPI schema:

```JSON hl_lines="4-16"
{
    "components": {
        "schemas": {
            "Message": {

	"gorm.io/gorm"
	"gorm.io/gorm/clause"
	"gorm.io/gorm/schema"
)

var schemaCache = &sync.Map{}

func TestConvertToCreateValues_DestType_Slice(t *testing.T) {
	type user struct {
		ID    int `gorm:"primaryKey"`
		Name  string
		Email string `gorm:"default:(-)"`
		Age   int    `gorm:"default:(-)"`
	}

	s, err := schema.Parse(&user{}, schemaCache, schema.NamingStrategy{})
	if err != nil {

                        },
                        "422": {
                            "description": "Validation Error",
                            "content": {
                                "application/json": {
                                    "schema": {
                                        "$ref": "#/components/schemas/HTTPValidationError"

                                "schema": {"type": "string", "title": "Host"},
                            },
                            {
                                "name": "save_data",
                                "in": "header",
                                "required": True,
                                "schema": {"type": "boolean", "title": "Save Data"},
                            },

    page.get_by_text("GET/items/Read Items").click()
    page.get_by_role("tab", name="Schema").click()
    page.get_by_label("Schema").get_by_role("button", name="Expand all").click()
    # Manually add the screenshot
    page.screenshot(
        path="docs/en/docs/img/tutorial/separate-openapi-schemas/image03.png"
    )

    # ---------------------
    context.close()
    browser.close()

                        },
                        "422": {
                            "description": "Validation Error",
                            "content": {
                                "application/json": {
                                    "schema": {
                                        "$ref": "#/components/schemas/HTTPValidationError"

	syncMap := &sync.Map{}
	for i := 0; i < 10; i++ {
		go func() {
			schema.Parse(&Info1{}, syncMap, schema.NamingStrategy{IdentifierMaxLength: 64})
		}()

		go func() {
			schema.Parse(&Info2{}, syncMap, schema.NamingStrategy{IdentifierMaxLength: 64})
		}()

		go func() {
			var result User
			schema.Parse(&result, syncMap, schema.NamingStrategy{IdentifierMaxLength: 64})
		}()
		go func() {

                        },
                        "422": {
                            "description": "Validation Error",
                            "content": {
                                "application/json": {
                                    "schema": {
                                        "$ref": "#/components/schemas/HTTPValidationError"

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