8456c5ec60
Close #27840. By default, `zone.js` wrap uncaught promise error and wrap it to a new Error object with some additional information includes the value of the error and the stack trace. Consider the following example: ``` Zone.current .fork({ name: 'promise-error', onHandleError: (delegate: ZoneDelegate, current: Zone, target: Zone, error: any): boolean => { console.log('caught an error', error); delegate.handleError(target, error); return false; } }).run(() => { const originalError = new Error('testError'); Promise.reject(originalError); }); ``` The `promise-error` zone catches a wrapped `Error` object whose `rejection` property equals to the original error, and the message will be `Uncaught (in promise): testError....`, You can disable this wrapping behavior by defining a global configuraiton `__zone_symbol__DISABLE_WRAPPING_UNCAUGHT_PROMISE_REJECTION = true;` before importing `zone.js`. PR Close #35873
80 lines
2.6 KiB
TypeScript
80 lines
2.6 KiB
TypeScript
/**
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* @license
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* Copyright Google Inc. All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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class TestRejection {
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prop1?: string;
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prop2?: string;
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}
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describe('disable wrap uncaught promise rejection', () => {
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it('should notify Zone.onHandleError if promise is uncaught', (done) => {
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let promiseError: Error|null = null;
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let zone: Zone|null = null;
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let task: Task|null = null;
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let error: Error|null = null;
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Zone.current
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.fork({
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name: 'promise-error',
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onHandleError: (delegate: ZoneDelegate, current: Zone, target: Zone, error: any):
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boolean => {
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promiseError = error;
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delegate.handleError(target, error);
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return false;
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}
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})
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.run(() => {
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zone = Zone.current;
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task = Zone.currentTask;
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error = new Error('rejectedErrorShouldBeHandled');
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try {
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// throw so that the stack trace is captured
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throw error;
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} catch (e) {
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}
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Promise.reject(error);
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expect(promiseError).toBe(null);
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});
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setTimeout((): any => null);
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setTimeout(() => {
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expect(promiseError).toBe(error);
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expect((promiseError as any)['rejection']).toBe(error);
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expect((promiseError as any)['zone']).toBe(zone);
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expect((promiseError as any)['task']).toBe(task);
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done();
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});
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});
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it('should print original information when a non-Error object is used for rejection', (done) => {
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let promiseError: Error|null = null;
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let rejectObj: TestRejection;
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Zone.current
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.fork({
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name: 'promise-error',
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onHandleError: (delegate: ZoneDelegate, current: Zone, target: Zone, error: any):
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boolean => {
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promiseError = error;
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delegate.handleError(target, error);
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return false;
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}
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})
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.run(() => {
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rejectObj = new TestRejection();
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rejectObj.prop1 = 'value1';
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rejectObj.prop2 = 'value2';
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(rejectObj as any).message = 'rejectMessage';
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Promise.reject(rejectObj);
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expect(promiseError).toBe(null);
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});
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setTimeout((): any => null);
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setTimeout(() => {
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expect(promiseError).toEqual(rejectObj as any);
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done();
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});
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});
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});
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