data-to-jsonschema-to-ts/dist/esm/json-to-ts.test.js

Convert plain javascript objects to JSON Schema and TypeScript typings

import { describe, expect, test } from "vitest";
import { convertJsonSchemaToTs } from "./json-to-ts.js";
describe("json-to-ts", () => {
    test("should convert json schema to typescript", async () => {
        // Given
        //{
        // $schema: "http://json-schema.org/draft-07/schema#",
        // title: "RootObject",
        // type: "object",
        // properties: {
        //   foo: {
        //     type: "string",
        //   },
        //   bar: {
        //     type: "number",
        //   },
        //   emptyObject: {
        //     type: "object",
        //   },
        // },
        // }
        const schema = {
            "$schema": "http://json-schema.org/draft-07/schema#",
            "title": "Product Catalog Schema",
            "type": "object",
            "$defs": {
                "price": {
                    "type": "object",
                    "properties": {
                        "amount": {
                            "type": "number",
                            "description": "The numerical price value",
                            "minimum": 0,
                            "exclusiveMinimum": true
                        },
                    }
                }
            },
            "properties": {
                "price": {
                    "$ref": "#/$defs/price",
                },
            }
        };
        const result = await convertJsonSchemaToTs(schema, {
            additionalProperties: true,
        });
        console.log("result", result);
        // replace all line breaks with a space and extra spaces to 1 space
        const ts = result.replace(/\n/g, " ").replace(/\s+/g, " ");
        // console.log('result', ts)
        expect(ts).toBe(`export interface RootObject { foo?: string; bar?: number; } `);
    });
});
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