Function performVisualTests

build-system/tasks/visual-diff/index.js:630–664

* Runs the AMP visual diff tests. * * @return {Promise }

()

 * @return {Promise<void>}
 */
async function performVisualTests() {
  setDebuggingLevel();

  const browser = await launchBrowser();
  const handlerProcess = createCtrlcHandler(
    'visual-diff:browser',
    browser.process()?.pid
  );
  await startServer(
    {host: HOST, port: PORT},
    {quiet: !argv.webserver_debug},
    {minified: true}
  );

  try {
    if (!argv.empty) {
      // Load and parse the config. Use JSON5 due to JSON comments in file.
      const visualTestsConfig = JSON5.parse(
        fs.readFileSync(
          path.resolve(
            __dirname,
            '../../../test/visual-diff/visual-tests.jsonc'
          ),
          'utf8'
        )
      );
      await runVisualTests(browser, visualTestsConfig.webpages);
    }
    await createEmptyBuild(browser);
  } finally {
    await browser.close();
    exitCtrlcHandler(handlerProcess);
    await stopServer();
  }
}

/**
 * @return {Promise<void>}