subapps/resources/subapps-helpers.js

// This mock provides a way to intercept renderer <-> browser mojo messages for
// navigator.subApps.* calls eliminating the need for an actual browser.
//
// In Chromium-based browsers this implementation is provided by a polyfill
// in order to reduce the amount of test-only code shipped to users.

'use strict';

let mockSubAppsService = null;

const Status = {
  SUCCESS: 0,
  FAILURE: 1,
};

async function createMockSubAppsService(service_result_code) {
  if (typeof SubAppsServiceTest === 'undefined') {
    // Load test-only API helpers.
    const script = document.createElement('script');
    script.src = '/resources/test-only-api.js';
    script.async = false;
    const p = new Promise((resolve, reject) => {
      script.onload = () => { resolve(); };
      script.onerror = e => { reject(e); };
    })
    document.head.appendChild(script);
    await p;

    if (isChromiumBased) {
      // Chrome setup.
      await import ('/resources/chromium/mock-subapps.js');
    } else {
      throw new Error('Unsupported browser.');
    }
  }
  assert_implements(SubAppsServiceTest, 'SubAppsServiceTest is not loaded properly.');

  if (mockSubAppsService === null) {
    mockSubAppsService = new SubAppsServiceTest();
    mockSubAppsService.initialize(service_result_code);
  }
}

function subapps_test(func, description) {
  promise_test(async test => {
    test.add_cleanup(async () => {
      await mockSubAppsService.reset();
      mockSubAppsService = null;
    });
    await createMockSubAppsService(Status.SUCCESS);
    await func(test, mockSubAppsService);
  }, description);
}