@shopify/jest-dom-mocks/build/cjs/request-idle-callback.js

Jest mocking utilities for working with the DOM

'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

class RequestIdleCallback {
  constructor() {
    this.isUsingMockIdleCallback = false;
    this.isMockingUnsupported = false;
    this.queued = {};
    this.currentIdleCallback = 0;
    this.requestIdleCallback = callback => {
      this.currentIdleCallback += 1;
      this.queued[this.currentIdleCallback] = callback;
      return this.currentIdleCallback;
    };
    this.cancelIdleCallback = callback => {
      delete this.queued[callback];
    };
  }
  mock() {
    if (this.isUsingMockIdleCallback) {
      throw new Error('requestIdleCallback is already mocked, but you tried to mock it again.');
    }
    this.isUsingMockIdleCallback = true;
    const windowWithIdle = window;
    this.originalRequestIdleCallback = windowWithIdle.requestIdleCallback;
    windowWithIdle.requestIdleCallback = this.requestIdleCallback;
    this.originalCancelIdleCallback = windowWithIdle.cancelIdleCallback;
    windowWithIdle.cancelIdleCallback = this.cancelIdleCallback;
  }
  mockAsUnsupported() {
    if (this.isUsingMockIdleCallback) {
      throw new Error('requestIdleCallback is already mocked, but you tried to mock it again.');
    }
    this.isUsingMockIdleCallback = true;
    this.isMockingUnsupported = true;
    const windowWithIdle = window;
    this.originalRequestIdleCallback = windowWithIdle.requestIdleCallback;
    delete windowWithIdle.requestIdleCallback;
    this.originalCancelIdleCallback = windowWithIdle.cancelIdleCallback;
    delete windowWithIdle.cancelIdleCallback;
  }
  restore() {
    if (!this.isUsingMockIdleCallback) {
      throw new Error('requestIdleCallback is already real, but you tried to restore it again.');
    }
    if (Object.keys(this.queued).length > 0) {
      // eslint-disable-next-line no-console
      console.warn('You are restoring requestIdleCallback, but some idle callbacks have not been run. You can run requestIdleCallback.cancelIdleCallback() to clear them all and avoid this warning.');
      this.cancelIdleCallbacks();
    }
    this.isUsingMockIdleCallback = false;
    this.isMockingUnsupported = false;
    if (this.originalRequestIdleCallback) {
      window.requestIdleCallback = this.originalRequestIdleCallback;
    } else {
      delete window.requestIdleCallback;
    }
    if (this.originalCancelIdleCallback) {
      window.cancelIdleCallback = this.originalCancelIdleCallback;
    } else {
      delete window.cancelIdleCallback;
    }
  }
  isMocked() {
    return this.isUsingMockIdleCallback;
  }
  runIdleCallbacks(timeRemaining = Infinity, didTimeout = false) {
    this.ensureIdleCallbackIsMock();

    // We need to do it this way so that frames that queue other frames
    // don't get removed
    Object.keys(this.queued).forEach(frame => {
      const callback = this.queued[frame];
      delete this.queued[frame];
      callback({
        timeRemaining: () => timeRemaining,
        didTimeout
      });
    });
  }
  cancelIdleCallbacks() {
    this.ensureIdleCallbackIsMock();
    for (const id of Object.keys(this.queued)) {
      this.cancelIdleCallback(id);
    }
  }
  ensureIdleCallbackIsMock() {
    if (!this.isUsingMockIdleCallback) {
      throw new Error('You must call requestIdleCallback.mock() before interacting with the mock request- or cancel- IdleCallback methods.');
    }
    if (this.isMockingUnsupported) {
      throw new Error('You have mocked requestIdleCallback as unsupported. Call requestIdleCallback.restore(), then requestIdleCallback.mock() if you want to simulate idle callbacks.');
    }
  }
}

exports["default"] = RequestIdleCallback;