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import { json } from "../../mod.ts";import { Buffer, expect } from "../deps.ts";import { describe, it } from "../utils.ts";
const encoder = new TextEncoder();const mockJson = { hello: "deno" };
const jsonHeaders = new Headers();jsonHeaders.set("Content-Type", "application/json");
const textHeaders = new Headers();textHeaders.set("Content-Type", "text/plain");textHeaders.set("Content-Length", "1");
describe("bodyParser: json", () => {  it("should handle requests without bodies", (done) => {    const req: any = { headers: jsonHeaders };    const parser = json();
    parser(req, {} as any, (err?: any) => {      if (err) throw err;      expect(req.parsedBody).toEqual({});      done();    });  });
  it("should handle requests with encoded JSON bodies", (done) => {    const req: any = {      body: new Buffer(encoder.encode(JSON.stringify(mockJson))),      headers: jsonHeaders,    };    req.headers.set("Content-Length", "1");    const parser = json();
    parser(req, {} as any, (err?: any) => {      if (err) throw err;      expect(req.parsedBody).toEqual(mockJson);      done();    });  });
  it("should handle requests with encoded JSON array bodies", (done) => {    const req: any = {      body: new Buffer(encoder.encode(JSON.stringify([mockJson]))),      headers: jsonHeaders,    };    req.headers.set("Content-Length", "1");    const parser = json();
    parser(req, {} as any, (err?: any) => {      if (err) throw err;      expect(req.parsedBody).toEqual([mockJson]);      done();    });  });
  it("should handle requests with encoded JSON bodies containing whitespace", (done) => {    const req: any = {      body: new Buffer(        encoder.encode(` \r\n\t\n${JSON.stringify(mockJson)}\n\t\r\n `),      ),      headers: jsonHeaders,    };    req.headers.set("Content-Length", "1");    const parser = json();
    parser(req, {} as any, (err?: any) => {      if (err) throw err;      expect(req.parsedBody).toEqual(mockJson);      done();    });  });
  it("should not alter request bodies when the content type is not JSON", (done) => {    const mockBody = Symbol("test-body");    const req: any = {      body: mockBody,      headers: textHeaders,    };    req.headers.set("Content-Length", "1");    const parser = json();
    parser(req, {} as any, (err?: unknown) => {      if (err) throw err;      expect(req.body).toEqual(mockBody);      expect(req.parsedBody).toBeUndefined();      done();    });  });});