angular-docs-cn/modules/@angular/facade/test/exception_handler_spec.ts

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/**
* @license
* Copyright Google Inc. 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 {beforeEach, ddescribe, describe, expect, iit, inject, it, xdescribe, xit,} from '@angular/core/testing/testing_internal';
import {BaseException, WrappedException, ExceptionHandler} from '../src/exceptions';
class _CustomException {
context = 'some context';
toString(): string { return 'custom'; }
}
export function main() {
describe('ExceptionHandler', () => {
it('should output exception', () => {
var e = ExceptionHandler.exceptionToString(new BaseException('message!'));
expect(e).toContain('message!');
});
it('should output stackTrace', () => {
var e = ExceptionHandler.exceptionToString(new BaseException('message!'), 'stack!');
expect(e).toContain('stack!');
});
it('should join a long stackTrace', () => {
var e =
ExceptionHandler.exceptionToString(new BaseException('message!'), ['stack1', 'stack2']);
expect(e).toContain('stack1');
expect(e).toContain('stack2');
});
it('should output reason when present', () => {
var e = ExceptionHandler.exceptionToString(new BaseException('message!'), null, 'reason!');
expect(e).toContain('reason!');
});
describe('context', () => {
it('should print context', () => {
var e = ExceptionHandler.exceptionToString(
new WrappedException('message!', null, null, 'context!'));
expect(e).toContain('context!');
});
it('should print nested context', () => {
var original = new WrappedException('message!', null, null, 'context!');
var e = ExceptionHandler.exceptionToString(new WrappedException('message', original));
expect(e).toContain('context!');
});
it('should not print context when the passed-in exception is not a BaseException', () => {
var e = ExceptionHandler.exceptionToString(new _CustomException());
expect(e).not.toContain('context');
});
});
describe('original exception', () => {
it('should print original exception message if available (original is BaseException)', () => {
var realOriginal = new BaseException('inner');
var original = new WrappedException('wrapped', realOriginal);
var e =
ExceptionHandler.exceptionToString(new WrappedException('wrappedwrapped', original));
expect(e).toContain('inner');
});
it('should print original exception message if available (original is not BaseException)',
() => {
var realOriginal = new _CustomException();
var original = new WrappedException('wrapped', realOriginal);
var e =
ExceptionHandler.exceptionToString(new WrappedException('wrappedwrapped', original));
expect(e).toContain('custom');
});
});
describe('original stack', () => {
it('should print original stack if available', () => {
var realOriginal = new BaseException('inner');
var original = new WrappedException('wrapped', realOriginal, 'originalStack');
var e = ExceptionHandler.exceptionToString(
new WrappedException('wrappedwrapped', original, 'wrappedStack'));
expect(e).toContain('originalStack');
});
});
});
}