index.js 4.86 KB

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'use strict';

function _jsdom() {
  const data = require('jsdom');

  _jsdom = function () {
    return data;
  };

  return data;
}

function _fakeTimers() {
  const data = require('@jest/fake-timers');

  _fakeTimers = function () {
    return data;
  };

  return data;
}

function _jestMock() {
  const data = require('jest-mock');

  _jestMock = function () {
    return data;
  };

  return data;
}

function _jestUtil() {
  const data = require('jest-util');

  _jestUtil = function () {
    return data;
  };

  return data;
}

function _defineProperty(obj, key, value) {
  if (key in obj) {
    Object.defineProperty(obj, key, {
      value: value,
      enumerable: true,
      configurable: true,
      writable: true
    });
  } else {
    obj[key] = value;
  }
  return obj;
}

class JSDOMEnvironment {
  constructor(config, options) {
    _defineProperty(this, 'dom', void 0);

    _defineProperty(this, 'fakeTimers', void 0);

    _defineProperty(this, 'fakeTimersModern', void 0);

    _defineProperty(this, 'global', void 0);

    _defineProperty(this, 'errorEventListener', void 0);

    _defineProperty(this, 'moduleMocker', void 0);

    this.dom = new (_jsdom().JSDOM)(
      typeof config.testEnvironmentOptions.html === 'string'
        ? config.testEnvironmentOptions.html
        : '<!DOCTYPE html>',
      {
        pretendToBeVisual: true,
        resources:
          typeof config.testEnvironmentOptions.userAgent === 'string'
            ? new (_jsdom().ResourceLoader)({
                userAgent: config.testEnvironmentOptions.userAgent
              })
            : undefined,
        runScripts: 'dangerously',
        url: config.testURL,
        virtualConsole: new (_jsdom().VirtualConsole)().sendTo(
          (options === null || options === void 0 ? void 0 : options.console) ||
            console
        ),
        ...config.testEnvironmentOptions
      }
    );
    const global = (this.global = this.dom.window.document.defaultView);

    if (!global) {
      throw new Error('JSDOM did not return a Window object');
    } // for "universal" code (code should use `globalThis`)

    global.global = global; // Node's error-message stack size is limited at 10, but it's pretty useful
    // to see more than that when a test fails.

    this.global.Error.stackTraceLimit = 100;
    (0, _jestUtil().installCommonGlobals)(global, config.globals); // TODO: remove this ASAP, but it currently causes tests to run really slow

    global.Buffer = Buffer; // Report uncaught errors.

    this.errorEventListener = event => {
      if (userErrorListenerCount === 0 && event.error) {
        process.emit('uncaughtException', event.error);
      }
    };

    global.addEventListener('error', this.errorEventListener); // However, don't report them as uncaught if the user listens to 'error' event.
    // In that case, we assume the might have custom error handling logic.

    const originalAddListener = global.addEventListener;
    const originalRemoveListener = global.removeEventListener;
    let userErrorListenerCount = 0;

    global.addEventListener = function (...args) {
      if (args[0] === 'error') {
        userErrorListenerCount++;
      }

      return originalAddListener.apply(this, args);
    };

    global.removeEventListener = function (...args) {
      if (args[0] === 'error') {
        userErrorListenerCount--;
      }

      return originalRemoveListener.apply(this, args);
    };

    this.moduleMocker = new (_jestMock().ModuleMocker)(global);
    const timerConfig = {
      idToRef: id => id,
      refToId: ref => ref
    };
    this.fakeTimers = new (_fakeTimers().LegacyFakeTimers)({
      config,
      global: global,
      moduleMocker: this.moduleMocker,
      timerConfig
    });
    this.fakeTimersModern = new (_fakeTimers().ModernFakeTimers)({
      config,
      global: global
    });
  }

  async setup() {}

  async teardown() {
    if (this.fakeTimers) {
      this.fakeTimers.dispose();
    }

    if (this.fakeTimersModern) {
      this.fakeTimersModern.dispose();
    }

    if (this.global) {
      if (this.errorEventListener) {
        this.global.removeEventListener('error', this.errorEventListener);
      }

      this.global.close(); // Dispose "document" to prevent "load" event from triggering.
      // Note that this.global.close() will trigger the CustomElement::disconnectedCallback
      // Do not reset the document before CustomElement disconnectedCallback function has finished running,
      // document should be accessible within disconnectedCallback.

      Object.defineProperty(this.global, 'document', {
        value: null
      });
    }

    this.errorEventListener = null; // @ts-expect-error

    this.global = null;
    this.dom = null;
    this.fakeTimers = null;
    this.fakeTimersModern = null;
  }

  getVmContext() {
    if (this.dom) {
      return this.dom.getInternalVMContext();
    }

    return null;
  }
}

module.exports = JSDOMEnvironment;