angular-cn/packages/compiler-cli/test/ngtsc/incremental_spec.ts

47 lines
1.3 KiB
TypeScript

/**
* @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 {NgtscTestEnvironment} from './env';
describe('ngtsc incremental compilation', () => {
let env !: NgtscTestEnvironment;
beforeEach(() => {
env = NgtscTestEnvironment.setup();
env.enableMultipleCompilations();
env.tsconfig();
});
it('should compile incrementally', () => {
env.write('service.ts', `
import {Injectable} from '@angular/core';
@Injectable()
export class Service {}
`);
env.write('test.ts', `
import {Component} from '@angular/core';
import {Service} from './service';
@Component({selector: 'cmp', template: 'cmp'})
export class Cmp {
constructor(service: Service) {}
}
`);
env.driveMain();
env.flushWrittenFileTracking();
// Pretend a change was made to test.ts.
env.invalidateCachedFile('test.ts');
env.driveMain();
const written = env.getFilesWrittenSinceLastFlush();
// The component should be recompiled, but not the service.
expect(written).toContain('/test.js');
expect(written).not.toContain('/service.js');
});
});