metamask-extension/test/e2e/helpers.js

const path = require('path');
const sinon = require('sinon');
const createStaticServer = require('../../development/create-static-server');
const {
  createSegmentServer,
} = require('../../development/lib/create-segment-server');
const Ganache = require('./ganache');
const FixtureServer = require('./fixture-server');
const { buildWebDriver } = require('./webdriver');

const tinyDelayMs = 200;
const regularDelayMs = tinyDelayMs * 2;
const largeDelayMs = regularDelayMs * 2;

const dappPort = 8080;

async function withFixtures(options, testSuite) {
  const {
    dapp,
    fixtures,
    ganacheOptions,
    driverOptions,
    mockSegment,
    title,
  } = options;
  const fixtureServer = new FixtureServer();
  const ganacheServer = new Ganache();
  let dappServer;
  let segmentServer;
  let segmentStub;

  let webDriver;
  try {
    await ganacheServer.start(ganacheOptions);
    await fixtureServer.start();
    await fixtureServer.loadState(path.join(__dirname, 'fixtures', fixtures));
    if (dapp) {
      const dappDirectory = path.resolve(
        __dirname,
        '..',
        '..',
        'node_modules',
        '@metamask',
        'test-dapp',
        'dist',
      );
      dappServer = createStaticServer(dappDirectory);
      dappServer.listen(dappPort);
      await new Promise((resolve, reject) => {
        dappServer.on('listening', resolve);
        dappServer.on('error', reject);
      });
    }
    if (mockSegment) {
      segmentStub = sinon.stub();
      segmentServer = createSegmentServer((_request, response, events) => {
        for (const event of events) {
          segmentStub(event);
        }
        response.statusCode = 200;
        response.end();
      });
      await segmentServer.start(9090);
    }
    const { driver } = await buildWebDriver(driverOptions);
    webDriver = driver;

    await testSuite({
      driver,
      segmentStub,
    });

    if (process.env.SELENIUM_BROWSER === 'chrome') {
      const errors = await driver.checkBrowserForConsoleErrors(driver);
      if (errors.length) {
        const errorReports = errors.map((err) => err.message);
        const errorMessage = `Errors found in browser console:\n${errorReports.join(
          '\n',
        )}`;
        throw new Error(errorMessage);
      }
    }
  } catch (error) {
    if (webDriver) {
      try {
        await webDriver.verboseReportOnFailure(title);
      } catch (verboseReportError) {
        console.error(verboseReportError);
      }
    }
    throw error;
  } finally {
    await fixtureServer.stop();
    await ganacheServer.quit();
    if (webDriver) {
      await webDriver.quit();
    }
    if (dappServer) {
      await new Promise((resolve, reject) => {
        dappServer.close((error) => {
          if (error) {
            return reject(error);
          }
          return resolve();
        });
      });
    }
    if (segmentServer) {
      await segmentServer.stop();
    }
  }
}

module.exports = {
  tinyDelayMs,
  regularDelayMs,
  largeDelayMs,
  withFixtures,
};