a7155bc2fa
In preparation for in-memory testing infrastructure, the existing Ivy language service tests are moved to a `legacy` directory. These existing tests rely on a single integration project in `test/project/app`, which presents a number of challenges: * adding extra fields/properties to the integration project for one test can cause others to fail/flake. * it's especially difficult to test any cases that require introducing intentional errors, as those tend to break other tests. * tests load files from disk, which is slower. * tests rely on the real built versions of @angular/core and @angular/common, which makes them both slow to build and require rebuilds on every compiler change. * tests share a single tsconfig.json, making it extremely difficult to test how the language service handles different configuration scenarios (e.g. different type-checking flags). PR Close #39594
76 lines
2.9 KiB
TypeScript
76 lines
2.9 KiB
TypeScript
/**
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* @license
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* Copyright Google LLC 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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import * as ts from 'typescript/lib/tsserverlibrary';
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import {LanguageService} from '../../language_service';
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import {APP_COMPONENT, MockService, setup, TEST_TEMPLATE} from './mock_host';
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describe('getSemanticDiagnostics', () => {
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let service: MockService;
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let ngLS: LanguageService;
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beforeAll(() => {
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const {project, service: _service, tsLS} = setup();
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service = _service;
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ngLS = new LanguageService(project, tsLS);
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});
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beforeEach(() => {
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service.reset();
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});
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it('should not produce error for AppComponent', () => {
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const diags = ngLS.getSemanticDiagnostics(APP_COMPONENT);
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expect(diags).toEqual([]);
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});
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it('should report member does not exist', () => {
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const {text} = service.overwriteInlineTemplate(APP_COMPONENT, '{{ nope }}');
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const diags = ngLS.getSemanticDiagnostics(APP_COMPONENT);
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expect(diags.length).toBe(1);
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const {category, file, start, length, messageText} = diags[0];
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expect(category).toBe(ts.DiagnosticCategory.Error);
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expect(file?.fileName).toBe(APP_COMPONENT);
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expect(text.substring(start!, start! + length!)).toBe('nope');
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expect(messageText).toBe(`Property 'nope' does not exist on type 'AppComponent'.`);
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});
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it('should process external template', () => {
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const diags = ngLS.getSemanticDiagnostics(TEST_TEMPLATE);
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expect(diags).toEqual([]);
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});
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it('should report member does not exist in external template', () => {
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const {text} = service.overwrite(TEST_TEMPLATE, `{{ nope }}`);
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const diags = ngLS.getSemanticDiagnostics(TEST_TEMPLATE);
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expect(diags.length).toBe(1);
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const {category, file, start, length, messageText} = diags[0];
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expect(category).toBe(ts.DiagnosticCategory.Error);
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expect(file?.fileName).toBe(TEST_TEMPLATE);
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expect(text.substring(start!, start! + length!)).toBe('nope');
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expect(messageText).toBe(`Property 'nope' does not exist on type 'TemplateReference'.`);
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});
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it('should retrieve external template from latest snapshot', () => {
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// This test is to make sure we are reading from snapshot instead of disk
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// if content from snapshot is newer. It also makes sure the internal cache
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// of the resource loader is invalidated on content change.
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service.overwrite(TEST_TEMPLATE, `{{ foo }}`);
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const d1 = ngLS.getSemanticDiagnostics(TEST_TEMPLATE);
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expect(d1.length).toBe(1);
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expect(d1[0].messageText).toBe(`Property 'foo' does not exist on type 'TemplateReference'.`);
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service.overwrite(TEST_TEMPLATE, `{{ bar }}`);
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const d2 = ngLS.getSemanticDiagnostics(TEST_TEMPLATE);
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expect(d2.length).toBe(1);
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expect(d2[0].messageText).toBe(`Property 'bar' does not exist on type 'TemplateReference'.`);
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});
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});
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