cors.test.ts

import { CORS } from './cors';
import { Message } from '../interfaces';

import { caseInsensitiveObject } from '../utils';

import { of } from 'rxjs';

describe('CORS unit tests', () => {
  test('smoke test', (done) => {
    const cors = new CORS(null);
    const message: Message = {
      request: { path: '', method: 'GET', headers: caseInsensitiveObject({}) },
      response: { headers: caseInsensitiveObject({}) }
    };
    cors.prehandle(of(message)).subscribe(({ response }) => {
      expect(response.headers['Access-Control-Allow-Origin']).toEqual('*');
      done();
    });
  });

  test('test preflightContinue', (done) => {
    const cors = new CORS({ origin: 'o', preflightContinue: false });
    const message: Message = {
      request: {
        path: '',
        method: 'OPTIONS',
        headers: caseInsensitiveObject({})
      },
      response: { headers: caseInsensitiveObject({}) }
    };
    cors.prehandle(of(message)).subscribe({
      next: () => {},
      error: ({ exception }) => {
        expect(exception.headers['Access-Control-Allow-Origin']).toEqual('o');
        expect(exception.headers['Content-Length']).toEqual('0');
        expect(exception.headers['Vary']).toEqual(
          'Origin, Access-Control-Request-Headers'
        );
        expect(exception.statusCode).toEqual(204);
        done();
      }
    });
  });

  test('test origin', (done) => {
    const cors = new CORS({ origin: 'o', preflightContinue: true });
    const message: Message = {
      request: { path: '', method: 'GET', headers: caseInsensitiveObject({}) },
      response: { headers: caseInsensitiveObject({}) }
    };
    cors.prehandle(of(message)).subscribe(({ response }) => {
      expect(response.headers['Access-Control-Allow-Origin']).toEqual('o');
      expect(response.headers['Vary']).toEqual('Origin');
      done();
    });
  });
});