675 lines
24 KiB
TypeScript
675 lines
24 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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import * as ts from 'typescript';
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import {createLanguageService} from '../src/language_service';
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import {TypeScriptServiceHost} from '../src/typescript_host';
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import {MockTypescriptHost} from './test_utils';
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/**
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* Note: If we want to test that a specific diagnostic message is emitted, then
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* use the `mockHost.addCode()` helper method to add code to an existing file and check
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* that the diagnostic messages contain the expected output.
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*
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* If the goal is to assert that there is no error in a specific file, then use
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* `mockHost.override()` method to completely override an existing file, and
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* make sure no diagnostics are produced. When doing so, be extra cautious
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* about import statements and make sure to assert empty TS diagnostic messages
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* as well.
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*/
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const EXPRESSION_CASES = '/app/expression-cases.ts';
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const NG_FOR_CASES = '/app/ng-for-cases.ts';
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const NG_IF_CASES = '/app/ng-if-cases.ts';
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describe('diagnostics', () => {
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const mockHost = new MockTypescriptHost(['/app/main.ts', '/app/parsing-cases.ts']);
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const tsLS = ts.createLanguageService(mockHost);
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const ngHost = new TypeScriptServiceHost(mockHost, tsLS);
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const ngLS = createLanguageService(ngHost);
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beforeEach(() => { mockHost.reset(); });
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it('should produce no diagnostics for test.ng', () => {
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// there should not be any errors on existing external template
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expect(ngLS.getDiagnostics('/app/test.ng')).toEqual([]);
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});
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it('should not return TS and NG errors for existing files', () => {
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const files = [
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'/app/app.component.ts',
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'/app/main.ts',
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];
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for (const file of files) {
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const syntaxDiags = tsLS.getSyntacticDiagnostics(file);
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expect(syntaxDiags).toEqual([]);
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const semanticDiags = tsLS.getSemanticDiagnostics(file);
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expect(semanticDiags).toEqual([]);
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const ngDiags = ngLS.getDiagnostics(file);
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expect(ngDiags).toEqual([]);
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}
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});
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describe('in expression-cases.ts', () => {
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it('should report access to an unknown field', () => {
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const diags = ngLS.getDiagnostics(EXPRESSION_CASES).map(d => d.messageText);
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expect(diags).toContain(
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`Identifier 'foo' is not defined. ` +
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`The component declaration, template variable declarations, ` +
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`and element references do not contain such a member`);
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});
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it('should report access to an unknown sub-field', () => {
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const diags = ngLS.getDiagnostics(EXPRESSION_CASES).map(d => d.messageText);
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expect(diags).toContain(
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`Identifier 'nam' is not defined. 'Person' does not contain such a member`);
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});
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it('should report access to a private member', () => {
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const diags = ngLS.getDiagnostics(EXPRESSION_CASES).map(d => d.messageText);
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expect(diags).toContain(`Identifier 'myField' refers to a private member of the component`);
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});
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it('should report numeric operator errors', () => {
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const diags = ngLS.getDiagnostics(EXPRESSION_CASES).map(d => d.messageText);
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expect(diags).toContain('Expected a numeric type');
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});
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});
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describe('in ng-for-cases.ts', () => {
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it('should report an unknown field', () => {
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const diags = ngLS.getDiagnostics(NG_FOR_CASES).map(d => d.messageText);
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expect(diags).toContain(
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`Identifier 'people_1' is not defined. ` +
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`The component declaration, template variable declarations, ` +
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`and element references do not contain such a member`);
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});
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it('should report an unknown context reference', () => {
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const diags = ngLS.getDiagnostics(NG_FOR_CASES).map(d => d.messageText);
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expect(diags).toContain(`The template context does not define a member called 'even_1'`);
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});
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it('should report an unknown value in a key expression', () => {
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const diags = ngLS.getDiagnostics(NG_FOR_CASES).map(d => d.messageText);
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expect(diags).toContain(
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`Identifier 'trackBy_1' is not defined. ` +
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`The component declaration, template variable declarations, ` +
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`and element references do not contain such a member`);
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});
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});
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describe('in ng-if-cases.ts', () => {
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it('should report an implicit context reference', () => {
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const diags = ngLS.getDiagnostics(NG_IF_CASES).map(d => d.messageText);
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expect(diags).toContain(`The template context does not define a member called 'unknown'`);
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});
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});
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// #17611
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it('should not report diagnostic on iteration of any', () => {
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const fileName = '/app/test.ng';
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mockHost.override(fileName, '<div *ngFor="let value of anyValue">{{value.someField}}</div>');
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const diagnostics = ngLS.getDiagnostics(fileName);
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expect(diagnostics).toEqual([]);
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});
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describe('with $event', () => {
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it('should accept an event', () => {
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const fileName = '/app/test.ng';
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mockHost.override(fileName, '<div (click)="myClick($event)">Click me!</div>');
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const diagnostics = ngLS.getDiagnostics(fileName);
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expect(diagnostics).toEqual([]);
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});
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it('should reject it when not in an event binding', () => {
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const fileName = '/app/test.ng';
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const content = mockHost.override(fileName, '<div [tabIndex]="$event"></div>');
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const diagnostics = ngLS.getDiagnostics(fileName) !;
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expect(diagnostics.length).toBe(1);
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const {messageText, start, length} = diagnostics[0];
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expect(messageText)
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.toBe(
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`Identifier '$event' is not defined. The component declaration, template variable declarations, and element references do not contain such a member`);
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const keyword = '$event';
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expect(start).toBe(content.lastIndexOf(keyword));
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expect(length).toBe(keyword.length);
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});
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});
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it('should not crash with a incomplete *ngFor', () => {
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const fileName = mockHost.addCode(`
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@Component({
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template: '<div *ngFor></div> ~{after-div}'
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})
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export class MyComponent {}`);
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expect(() => ngLS.getDiagnostics(fileName)).not.toThrow();
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});
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it('should report a component not in a module', () => {
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const fileName = mockHost.addCode(`
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@Component({
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template: '<div></div>'
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})
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export class MyComponent {}`);
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const diagnostics = ngLS.getDiagnostics(fileName) !;
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expect(diagnostics.length).toBe(1);
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const {messageText, start, length} = diagnostics[0];
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expect(messageText)
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.toBe(
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`Component 'MyComponent' is not included in a module and will not be available inside a template. Consider adding it to a NgModule declaration.`);
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const content = mockHost.readFile(fileName) !;
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const keyword = '@Component';
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expect(start).toBe(content.lastIndexOf(keyword) + 1); // exclude leading '@'
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expect(length).toBe(keyword.length - 1); // exclude leading '@'
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});
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it(`should not report an error for a form's host directives`, () => {
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const fileName = '/app/app.component.ts';
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mockHost.override(fileName, `
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import { Component } from '@angular/core';
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@Component({
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template: '<form></form>'})
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export class AppComponent {}`);
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const tsDiags = tsLS.getSemanticDiagnostics(fileName);
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expect(tsDiags).toEqual([]);
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const ngDiags = ngLS.getDiagnostics(fileName);
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expect(ngDiags).toEqual([]);
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});
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it('should not throw getting diagnostics for an index expression', () => {
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const fileName = mockHost.addCode(`
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@Component({
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template: '<a *ngIf="(auth.isAdmin | async) || (event.leads && event.leads[(auth.uid | async)])"></a>'
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})
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export class MyComponent {}`);
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expect(() => ngLS.getDiagnostics(fileName)).not.toThrow();
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});
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it('should not throw using a directive with no value', () => {
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const fileName = mockHost.addCode(`
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@Component({
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template: '<form><input [(ngModel)]="name" required /></form>'
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})
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export class MyComponent {
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name = 'some name';
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}`);
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expect(() => ngLS.getDiagnostics(fileName)).not.toThrow();
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});
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it('should report an error for invalid metadata', () => {
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const fileName = '/app/app.component.ts';
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const content = mockHost.override(fileName, `
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import { Component } from '@angular/core';
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@Component({
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template: '<div></div>',
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providers: [
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{provide: 'foo', useFactory: () => 'foo' }
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]
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})
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export class AppComponent {
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name = 'some name';
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}`);
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const tsDiags = tsLS.getSemanticDiagnostics(fileName);
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expect(tsDiags).toEqual([]);
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const ngDiags = ngLS.getDiagnostics(fileName) !;
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expect(ngDiags.length).toBe(1);
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const {messageText, start, length} = ngDiags[0];
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const keyword = `() => 'foo'`;
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expect(start).toBe(content.lastIndexOf(keyword));
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expect(length).toBe(keyword.length);
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// messageText is a three-part chain
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const firstPart = messageText as ts.DiagnosticMessageChain;
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expect(firstPart.messageText).toBe(`Error during template compile of 'AppComponent'`);
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const secondPart = firstPart.next !;
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expect(secondPart[0].messageText).toBe('Function expressions are not supported in decorators');
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const thirdPart = secondPart[0].next !;
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expect(thirdPart[0].messageText)
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.toBe('Consider changing the function expression into an exported function');
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expect(thirdPart[0].next).toBeFalsy();
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});
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it('should not throw for an invalid class', () => {
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const fileName = mockHost.addCode(`
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@Component({
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template: ''
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}) class`);
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expect(() => ngLS.getDiagnostics(fileName)).not.toThrow();
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});
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it('should not report an error for sub-types of string in non-strict mode', () => {
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const fileName = '/app/app.component.ts';
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mockHost.override(fileName, `
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import { Component } from '@angular/core';
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@Component({
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template: \`<div *ngIf="something === 'foo'"></div>\`
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})
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export class AppComponent {
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something: 'foo' | 'bar';
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}`);
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mockHost.overrideOptions({
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strict: false, // TODO: this test fails in strict mode
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});
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const tsDiags = tsLS.getSemanticDiagnostics(fileName);
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expect(tsDiags).toEqual([]);
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const ngDiags = ngLS.getDiagnostics(fileName);
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expect(ngDiags).toEqual([]);
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});
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it('should not report an error for sub-types of number in non-strict mode', () => {
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const fileName = '/app/app.component.ts';
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mockHost.override(fileName, `
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import { Component } from '@angular/core';
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@Component({
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template: '<div *ngIf="something === 123"></div>'
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})
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export class AppComponent {
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something: 123 | 456;
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}`);
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mockHost.overrideOptions({
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strict: false, // TODO: This test fails in strict mode
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});
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const tsDiags = tsLS.getSemanticDiagnostics(fileName);
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expect(tsDiags).toEqual([]);
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const ngDiags = ngLS.getDiagnostics(fileName);
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expect(ngDiags).toEqual([]);
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});
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it('should report a warning if an event results in a callable expression', () => {
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const fileName = '/app/app.component.ts';
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const content = mockHost.override(fileName, `
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import { Component } from '@angular/core';
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@Component({
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template: '<div (click)="onClick"></div>'
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})
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export class AppComponent {
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onClick() { }
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}`);
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const diagnostics = ngLS.getDiagnostics(fileName) !;
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const {messageText, start, length} = diagnostics[0];
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expect(messageText).toBe('Unexpected callable expression. Expected a method call');
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const keyword = `"onClick"`;
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expect(start).toBe(content.lastIndexOf(keyword) + 1); // exclude leading quote
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expect(length).toBe(keyword.length - 2); // exclude leading and trailing quotes
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});
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// #13412
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it('should not report an error for using undefined under non-strict mode', () => {
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const fileName = '/app/app.component.ts';
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mockHost.override(fileName, `
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import { Component } from '@angular/core';
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@Component({
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template: '<div *ngIf="something === undefined"></div>'
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})
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export class AppComponent {
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something = 'foo';
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}`);
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mockHost.overrideOptions({
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strict: false, // TODO: This test fails in strict mode
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});
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const tsDiags = tsLS.getSemanticDiagnostics(fileName);
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expect(tsDiags).toEqual([]);
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const ngDiags = ngLS.getDiagnostics(fileName);
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expect(ngDiags).toEqual([]);
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});
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// Issue #13326
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it('should report a narrow span for invalid pipes', () => {
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const fileName = '/app/app.component.ts';
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const content = mockHost.override(fileName, `
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import { Component } from '@angular/core';
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@Component({
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template: '<p> Using an invalid pipe {{data | dat}} </p>'
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})
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export class AppComponent {
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data = 'some data';
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}`);
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const tsDiags = tsLS.getSemanticDiagnostics(fileName);
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expect(tsDiags).toEqual([]);
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const ngDiags = ngLS.getDiagnostics(fileName);
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expect(ngDiags.length).toBe(1);
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const {messageText, start, length} = ngDiags[0];
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expect(messageText).toBe(`The pipe 'dat' could not be found`);
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const keyword = 'data | dat';
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expect(start).toBe(content.lastIndexOf(keyword));
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expect(length).toBe(keyword.length);
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});
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// Issue #19406
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it('should allow empty template', () => {
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const fileName = '/app/app.component.ts';
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mockHost.override(fileName, `
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import { Component } from '@angular/core';
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@Component({
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template : '',
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})
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export class AppComponent {}`);
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const tsDiags = tsLS.getSemanticDiagnostics(fileName);
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expect(tsDiags).toEqual([]);
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const ngDiags = ngLS.getDiagnostics(fileName);
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expect(ngDiags).toEqual([]);
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});
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// Issue #15460
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it('should be able to find members defined on an ancestor type', () => {
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const fileName = '/app/app.component.ts';
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mockHost.override(fileName, `
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import { Component } from '@angular/core';
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import { NgForm } from '@angular/forms';
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@Component({
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selector: 'example-app',
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template: \`
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<form #f="ngForm" (ngSubmit)="onSubmit(f)" novalidate>
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<input name="first" ngModel required #first="ngModel">
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<input name="last" ngModel>
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<button>Submit</button>
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</form>
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<p>First name value: {{ first.value }}</p>
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<p>First name valid: {{ first.valid }}</p>
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<p>Form value: {{ f.value | json }}</p>
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<p>Form valid: {{ f.valid }}</p>
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\`,
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})
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export class AppComponent {
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onSubmit(form: NgForm) {}
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}`);
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const tsDiags = tsLS.getSemanticDiagnostics(fileName);
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expect(tsDiags).toEqual([]);
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const ngDiags = ngLS.getDiagnostics(fileName);
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expect(ngDiags).toEqual([]);
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});
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it('should report an error for invalid providers', () => {
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const fileName = '/app/app.component.ts';
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const content = mockHost.override(fileName, `
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import { Component } from '@angular/core';
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@Component({
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template: '',
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providers: [null]
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})
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export class AppComponent {}`);
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const tsDiags = tsLS.getSemanticDiagnostics(fileName);
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expect(tsDiags.length).toBe(1);
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const msgText = ts.flattenDiagnosticMessageText(tsDiags[0].messageText, '\n');
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expect(msgText).toBe(
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`Type 'null[]' is not assignable to type 'Provider[]'.\n Type 'null' is not assignable to type 'Provider'.`);
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const ngDiags = ngLS.getDiagnostics(fileName);
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expect(ngDiags.length).toBe(1);
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const {messageText, start, length} = ngDiags[0];
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expect(messageText)
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.toBe(
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'Invalid providers for "AppComponent in /app/app.component.ts" - only instances of Provider and Type are allowed, got: [?null?]');
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// TODO: Looks like this is the wrong span. Should point to 'null' instead.
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const keyword = '@Component';
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expect(start).toBe(content.lastIndexOf(keyword) + 1); // exclude leading '@'
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expect(length).toBe(keyword.length - 1); // exclude leading '@
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});
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// Issue #15768
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it('should be able to parse a template reference', () => {
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const fileName = '/app/app.component.ts';
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mockHost.override(fileName, `
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import { Component } from '@angular/core';
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@Component({
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selector: 'my-component',
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template: \`
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<div *ngIf="comps | async; let comps; else loading">
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</div>
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<ng-template #loading>Loading comps...</ng-template>
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\`
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})
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export class AppComponent {}`);
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const tsDiags = tsLS.getSemanticDiagnostics(fileName);
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expect(tsDiags).toEqual([]);
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const ngDiags = ngLS.getDiagnostics(fileName);
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expect(ngDiags).toEqual([]);
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});
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// Issue #15625
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it('should not report errors for localization syntax', () => {
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const fileName = '/app/app.component.ts';
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mockHost.override(fileName, `
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import { Component } from '@angular/core';
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@Component({
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selector: 'my-component',
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template: \`
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<div>
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{fieldCount, plural, =0 {no fields} =1 {1 field} other {{{fieldCount}} fields}}
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</div>
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\`
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})
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export class AppComponent {
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fieldCount: number = 0;
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}`);
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const tsDiags = tsLS.getSemanticDiagnostics(fileName);
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expect(tsDiags).toEqual([]);
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const ngDiags = ngLS.getDiagnostics(fileName);
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expect(ngDiags).toEqual([]);
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});
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// Issue #15885
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it('should be able to remove null and undefined from a type', () => {
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mockHost.overrideOptions({
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strictNullChecks: true,
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});
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const fileName = '/app/app.component.ts';
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mockHost.override(fileName, `
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import { Component } from '@angular/core';
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@Component({
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selector: 'my-component',
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template: '{{test?.a}}',
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})
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export class AppComponent {
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test: {a: number, b: number} | null = {
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a: 1,
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b: 2,
|
|
};
|
|
}`);
|
|
const tsDiags = tsLS.getSemanticDiagnostics(fileName);
|
|
expect(tsDiags).toEqual([]);
|
|
const ngDiags = ngLS.getDiagnostics(fileName);
|
|
expect(ngDiags).toEqual([]);
|
|
});
|
|
|
|
it('should be able to resolve modules using baseUrl', () => {
|
|
const fileName = '/app/app.component.ts';
|
|
mockHost.override(fileName, `
|
|
import { Component } from '@angular/core';
|
|
import { NgForm } from '@angular/forms';
|
|
import { Server } from 'app/server';
|
|
|
|
@Component({
|
|
selector: 'example-app',
|
|
template: '...',
|
|
providers: [Server]
|
|
})
|
|
export class AppComponent {
|
|
onSubmit(form: NgForm) {}
|
|
}`);
|
|
mockHost.addScript('/other/files/app/server.ts', 'export class Server {}');
|
|
mockHost.overrideOptions({
|
|
baseUrl: '/other/files',
|
|
});
|
|
const tsDiags = tsLS.getSemanticDiagnostics(fileName);
|
|
expect(tsDiags).toEqual([]);
|
|
const diagnostic = ngLS.getDiagnostics(fileName);
|
|
expect(diagnostic).toEqual([]);
|
|
});
|
|
|
|
it('should report errors for using the now removed OpaqueToken (deprecated)', () => {
|
|
const fileName = '/app/app.component.ts';
|
|
mockHost.override(fileName, `
|
|
import { Component, Inject, OpaqueToken } from '@angular/core';
|
|
import { NgForm } from '@angular/forms';
|
|
|
|
export const token = new OpaqueToken('some token');
|
|
|
|
@Component({
|
|
selector: 'example-app',
|
|
template: '...'
|
|
})
|
|
export class AppComponent {
|
|
constructor (@Inject(token) value: string) {}
|
|
onSubmit(form: NgForm) {}
|
|
}`);
|
|
const tsDiags = tsLS.getSemanticDiagnostics(fileName);
|
|
expect(tsDiags.length).toBe(1);
|
|
expect(tsDiags[0].messageText)
|
|
.toBe(
|
|
`Module '"../node_modules/@angular/core/core"' has no exported member 'OpaqueToken'.`);
|
|
});
|
|
|
|
describe('templates', () => {
|
|
it('should report errors for invalid templateUrls', () => {
|
|
const fileName = mockHost.addCode(`
|
|
@Component({
|
|
templateUrl: '«notAFile»',
|
|
})
|
|
export class MyComponent {}`);
|
|
|
|
const marker = mockHost.getReferenceMarkerFor(fileName, 'notAFile');
|
|
|
|
const diagnostics = ngLS.getDiagnostics(fileName) !;
|
|
const urlDiagnostic =
|
|
diagnostics.find(d => d.messageText === 'URL does not point to a valid file');
|
|
expect(urlDiagnostic).toBeDefined();
|
|
|
|
const {start, length} = urlDiagnostic !;
|
|
expect(start).toBe(marker.start);
|
|
expect(length).toBe(marker.length);
|
|
});
|
|
|
|
it('should not report errors for valid templateUrls', () => {
|
|
const fileName = mockHost.addCode(`
|
|
@Component({
|
|
templateUrl: './test.ng',
|
|
})
|
|
export class MyComponent {}`);
|
|
|
|
const diagnostics = ngLS.getDiagnostics(fileName) !;
|
|
const urlDiagnostic =
|
|
diagnostics.find(d => d.messageText === 'URL does not point to a valid file');
|
|
expect(urlDiagnostic).toBeUndefined();
|
|
});
|
|
|
|
it('should report diagnostic for missing template or templateUrl', () => {
|
|
const fileName = '/app/app.component.ts';
|
|
const content = mockHost.override(fileName, `
|
|
import {Component} from '@angular/core';
|
|
|
|
@Component({
|
|
selector: 'app-example',
|
|
})
|
|
export class AppComponent {}`);
|
|
const diags = ngLS.getDiagnostics(fileName);
|
|
expect(diags.length).toBe(1);
|
|
const {file, messageText, start, length} = diags[0];
|
|
expect(file !.fileName).toBe(fileName);
|
|
expect(messageText).toBe(`Component 'AppComponent' must have a template or templateUrl`);
|
|
expect(start).toBe(content.indexOf(`@Component`) + 1);
|
|
expect(length).toBe('Component'.length);
|
|
});
|
|
|
|
it('should report diagnostic for both template and templateUrl', () => {
|
|
const fileName = '/app/app.component.ts';
|
|
const content = mockHost.override(fileName, `
|
|
import {Component} from '@angular/core';
|
|
|
|
@Component({
|
|
selector: 'app-example',
|
|
template: '<div></div>',
|
|
templateUrl: './test.ng',
|
|
})
|
|
export class AppComponent {}`);
|
|
const diags = ngLS.getDiagnostics(fileName);
|
|
expect(diags.length).toBe(1);
|
|
const {file, messageText, start, length} = diags[0];
|
|
expect(file !.fileName).toBe(fileName);
|
|
expect(messageText)
|
|
.toBe(`Component 'AppComponent' must not have both template and templateUrl`);
|
|
expect(start).toBe(content.indexOf(`@Component`) + 1);
|
|
expect(length).toBe('Component'.length);
|
|
});
|
|
|
|
it('should report errors for invalid styleUrls', () => {
|
|
const fileName = mockHost.addCode(`
|
|
@Component({
|
|
styleUrls: ['«notAFile»'],
|
|
})
|
|
export class MyComponent {}`);
|
|
|
|
const marker = mockHost.getReferenceMarkerFor(fileName, 'notAFile');
|
|
|
|
const diagnostics = ngLS.getDiagnostics(fileName) !;
|
|
const urlDiagnostic =
|
|
diagnostics.find(d => d.messageText === 'URL does not point to a valid file');
|
|
expect(urlDiagnostic).toBeDefined();
|
|
|
|
const {start, length} = urlDiagnostic !;
|
|
expect(start).toBe(marker.start);
|
|
expect(length).toBe(marker.length);
|
|
});
|
|
|
|
it('should not report errors for valid styleUrls', () => {
|
|
const fileName = '/app/app.component.ts';
|
|
mockHost.override(fileName, `
|
|
import {Component} from '@angular/core';
|
|
|
|
@Component({
|
|
template: '<div></div>',
|
|
styleUrls: ['./test.css', './test.css'],
|
|
})
|
|
export class AppComponent {}`);
|
|
|
|
const diagnostics = ngLS.getDiagnostics(fileName) !;
|
|
expect(diagnostics.length).toBe(0);
|
|
});
|
|
});
|
|
|
|
// https://github.com/angular/vscode-ng-language-service/issues/235
|
|
// There is no easy fix for this issue currently due to the way template
|
|
// tokenization is done. In the example below, the whole string
|
|
// `\r\n{{line0}}\r\n{{line1}}\r\n{{line2}}` is tokenized as a whole, and then
|
|
// CR characters are stripped from it. Source span information is lost in the
|
|
// process. For more discussion, see the link above.
|
|
/*
|
|
it('should work correctly with CRLF endings', () => {
|
|
const fileName = '/app/test.ng';
|
|
const content = mockHost.override(fileName,
|
|
'\r\n<div>\r\n{{line0}}\r\n{{line1}}\r\n{{line2}}\r\n</div>');
|
|
const ngDiags = ngLS.getDiagnostics(fileName);
|
|
expect(ngDiags.length).toBe(3);
|
|
for (let i = 0; i < 3; ++i) {
|
|
const {messageText, start, length} = ngDiags[i];
|
|
expect(messageText)
|
|
.toBe(
|
|
`Identifier 'line${i}' is not defined. The component declaration, template variable
|
|
declarations, and element references do not contain such a member`);
|
|
// Assert that the span is actually highlight the bounded text. The span
|
|
// would be off if CRLF endings are not handled properly.
|
|
expect(content.substring(start !, start ! + length !)).toBe(`line${i}`);
|
|
}
|
|
});
|
|
*/
|
|
|
|
});
|