angular-docs-cn/packages/zone.js/test/common/promise-disable-wrap-uncaught-promise-rejection.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
 */

class TestRejection {
  prop1?: string;
  prop2?: string;
}

describe('disable wrap uncaught promise rejection', () => {
  it('should notify Zone.onHandleError if promise is uncaught', (done) => {
    let promiseError: Error|null = null;
    let zone: Zone|null = null;
    let task: Task|null = null;
    let error: Error|null = null;
    Zone.current
        .fork({
          name: 'promise-error',
          onHandleError: (delegate: ZoneDelegate, current: Zone, target: Zone, error: any):
              boolean => {
                promiseError = error;
                delegate.handleError(target, error);
                return false;
              }
        })
        .run(() => {
          zone = Zone.current;
          task = Zone.currentTask;
          error = new Error('rejectedErrorShouldBeHandled');
          try {
            // throw so that the stack trace is captured
            throw error;
          } catch (e) {
          }
          Promise.reject(error);
          expect(promiseError).toBe(null);
        });
    setTimeout((): any => null);
    setTimeout(() => {
      expect(promiseError).toBe(error);
      expect((promiseError as any)['rejection']).toBe(undefined);
      expect((promiseError as any)['zone']).toBe(undefined);
      expect((promiseError as any)['task']).toBe(undefined);
      done();
    });
  });

  it('should print original information when a non-Error object is used for rejection', (done) => {
    let promiseError: Error|null = null;
    let rejectObj: TestRejection;
    Zone.current
        .fork({
          name: 'promise-error',
          onHandleError: (delegate: ZoneDelegate, current: Zone, target: Zone, error: any):
              boolean => {
                promiseError = error;
                delegate.handleError(target, error);
                return false;
              }
        })
        .run(() => {
          rejectObj = new TestRejection();
          rejectObj.prop1 = 'value1';
          rejectObj.prop2 = 'value2';
          (rejectObj as any).message = 'rejectMessage';
          Promise.reject(rejectObj);
          expect(promiseError).toBe(null);
        });
    setTimeout((): any => null);
    setTimeout(() => {
      expect(promiseError).toEqual(rejectObj as any);
      done();
    });
  });

  it('should print original information when a primitive value is used for rejection', (done) => {
    let promiseError: number|null = null;
    Zone.current
        .fork({
          name: 'promise-error',
          onHandleError: (delegate: ZoneDelegate, current: Zone, target: Zone, error: any):
              boolean => {
                promiseError = error;
                delegate.handleError(target, error);
                return false;
              }
        })
        .run(() => {
          Promise.reject(42);
          expect(promiseError).toBe(null);
        });
    setTimeout((): any => null);
    setTimeout(() => {
      expect(promiseError).toBe(42);
      done();
    });
  });
});