src/test/suite/index.ts

// Copyright 2022 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import * as path from 'path';
import Mocha from 'mocha'; // not esm
import 'source-map-support/register'; // support source maps in the runner
import CIReporter from './reporter';

/**
 * Gather the tests from the test root directories, and run them.
 * @returns void promise.
 */
export function run(): Promise<void> {
  // Create the mocha test
  const mocha = new Mocha({
    ui: 'tdd',
    color: true,
    // support source maps in the test file
    require: ['source-map-support/register'],
  });
  if (process.env.TEST_XML_OUTPUT) {
    // on CI, output XUnit so that we can read things in nicely
    mocha.reporter(CIReporter, { output: process.env.TEST_XML_OUTPUT });
  }

  const testsRoot = path.resolve(__dirname, '..', '..', '..');

  mocha.addFile(path.resolve(testsRoot, 'all-tests.js'));

  return new Promise((c, e) => {
    try {
      // Run the mocha test
      mocha.run((failures) => {
        if (failures > 0) {
          e(Error(`${failures} tests failed.`));
        } else {
          c();
        }
      });
    } catch (err) {
      console.error(err);
      e(err instanceof Error ? err : new Error(String(err)));
    }
  });
}