angular-docs-cn/packages/zone.js/test/common/toString.spec.ts

/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */

import {zoneSymbol} from '../../lib/common/utils';
import {ifEnvSupports} from '../test-util';

const g: any =
    typeof window !== 'undefined' && window || typeof self !== 'undefined' && self || global;
describe('global function patch', () => {
  describe('isOriginal', () => {
    it('setTimeout toString should be the same with non patched setTimeout', () => {
      expect(Function.prototype.toString.call(setTimeout))
          .toEqual(Function.prototype.toString.call(g[zoneSymbol('setTimeout')]));
    });

    it('should not throw error if Promise is not a function', () => {
      const P = g.Promise;
      try {
        g.Promise = undefined;
        expect(() => {
          const a = {}.toString();
        }).not.toThrow();
      } finally {
        g.Promise = P;
      }
    });

    it('MutationObserver toString should be the same with native version',
       ifEnvSupports('MutationObserver', () => {
         const nativeMutationObserver = g[zoneSymbol('MutationObserver')];
         if (typeof nativeMutationObserver === 'function') {
           expect(Function.prototype.toString.call(g['MutationObserver']))
               .toEqual(Function.prototype.toString.call(nativeMutationObserver));
         } else {
           expect(Function.prototype.toString.call(g['MutationObserver']))
               .toEqual(Object.prototype.toString.call(nativeMutationObserver));
         }
       }));
  });

  describe('isNative', () => {
    it('ZoneAwareError toString should look like native', () => {
      expect(Function.prototype.toString.call(Error)).toContain('[native code]');
    });

    it('Function toString should look like native', () => {
      expect(Function.prototype.toString.call(Function.prototype.toString))
          .toContain('[native code]');
    });

    it('EventTarget addEventListener should look like native', ifEnvSupports('HTMLElement', () => {
         expect(Function.prototype.toString.call(HTMLElement.prototype.addEventListener))
             .toContain('[native code]');
       }));
  });
});

describe('ZoneTask', () => {
  it('should return handleId.toString if handleId is available', () => {
    let macroTask1: any = undefined;
    let macroTask2: any = undefined;
    let microTask: any = undefined;
    const zone = Zone.current.fork({
      name: 'timer',
      onScheduleTask: (delegate: ZoneDelegate, curr: Zone, target: Zone, task: Task) => {
        if (task.type === 'macroTask') {
          if (!macroTask1) {
            macroTask1 = task;
          } else {
            macroTask2 = task;
          }
        } else if (task.type === 'microTask') {
          microTask = task;
        }
        return task;
      }
    });
    zone.run(() => {
      const id1 = setTimeout(() => {});
      clearTimeout(id1);
      const id2 = setTimeout(() => {});
      clearTimeout(id2);
      Promise.resolve().then(() => {});
      const macroTask1Str = macroTask1.toString();
      const macroTask2Str = macroTask2.toString();
      expect(typeof macroTask1Str).toEqual('string');
      expect(macroTask1Str).toEqual(id1.toString());
      expect(typeof macroTask2Str).toEqual('string');
      expect(macroTask2Str).toEqual(id2.toString());
      if (macroTask1.data && typeof macroTask1.data.handleId === 'number') {
        expect(macroTask1Str).not.toEqual(macroTask2Str);
      }
      expect(typeof microTask.toString()).toEqual('string');
    });
  });
});