angular-cn/packages/language-service/ivy/test/diagnostic_spec.ts

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/**
* @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 * as ts from 'typescript/lib/tsserverlibrary';
import {LanguageService} from '../language_service';
import {APP_COMPONENT, setup} from './mock_host';
describe('diagnostic', () => {
const {project, service, tsLS} = setup();
const ngLS = new LanguageService(project, tsLS);
beforeEach(() => {
service.reset();
});
it('should not produce error for AppComponent', () => {
const diags = ngLS.getSemanticDiagnostics(APP_COMPONENT);
expect(diags).toEqual([]);
});
it('should report member does not exist', () => {
const content = service.overwriteInlineTemplate(APP_COMPONENT, '{{ nope }}');
const diags = ngLS.getSemanticDiagnostics(APP_COMPONENT);
expect(diags.length).toBe(1);
const {category, file, start, length, messageText} = diags[0];
expect(category).toBe(ts.DiagnosticCategory.Error);
expect(file?.fileName).toBe(APP_COMPONENT);
expect(content.substring(start!, start! + length!)).toBe('nope');
expect(messageText).toBe(`Property 'nope' does not exist on type 'AppComponent'.`);
});
});