mirror of
https://github.com/angular/angular
synced 2026-05-24 09:28:37 +00:00
f280467398
The current HMR compiler assumes that there will only be one namespace import in the generated code (`@angular/core`). This is incorrect, because the compiler may need to generate additional imports in some cases (e.g. importing directives through a module). These changes adjust the compiler to capture all the namespaces in an array and pass them along. Fixes #58915. PR Close #58924
353 lines
11 KiB
TypeScript
353 lines
11 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.dev/license
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*/
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import {runInEachFileSystem} from '../../src/ngtsc/file_system/testing';
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import {loadStandardTestFiles} from '../../src/ngtsc/testing';
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import {NgtscTestEnvironment} from './env';
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runInEachFileSystem(() => {
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describe('HMR code generation', () => {
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const testFiles = loadStandardTestFiles();
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let env!: NgtscTestEnvironment;
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beforeEach(() => {
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env = NgtscTestEnvironment.setup(testFiles);
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env.tsconfig();
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});
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function enableHmr(): void {
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env.write(
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'tsconfig.json',
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JSON.stringify({
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extends: './tsconfig-base.json',
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angularCompilerOptions: {
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_enableHmr: true,
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},
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}),
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);
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}
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it('should not generate an HMR code by default', () => {
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env.write(
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'test.ts',
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`
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import {Component} from '@angular/core';
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@Component({
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selector: 'cmp',
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template: 'hello',
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standalone: true,
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})
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export class Cmp {}
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`,
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);
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env.driveMain();
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const jsContents = env.getContents('test.js');
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const hmrContents = env.driveHmr('test.ts', 'Cmp');
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expect(jsContents).not.toContain('import.meta.hot');
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expect(jsContents).not.toContain('replaceMetadata');
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expect(hmrContents).toBe(null);
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});
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it('should generate an HMR initializer and update code when enabled', () => {
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enableHmr();
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env.write(
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'dep.ts',
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`
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import {Directive, InjectionToken} from '@angular/core';
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export const TOKEN = new InjectionToken<any>('token');
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export function transformValue(value: string) {
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return parseInt(value);
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}
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@Directive({
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selector: '[dep]',
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standalone: true,
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})
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export class Dep {}
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`,
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);
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env.write(
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'test.ts',
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`
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import {Component, ViewChild, Input, Inject} from '@angular/core';
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import {Dep, transformValue, TOKEN} from './dep';
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@Component({
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selector: 'cmp',
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standalone: true,
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template: '<div dep><div>',
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imports: [Dep],
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})
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export class Cmp {
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@ViewChild(Dep) dep: Dep;
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@Input({transform: transformValue}) value: number;
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constructor(@Inject(TOKEN) readonly token: any) {}
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}
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`,
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);
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env.driveMain();
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const jsContents = env.getContents('test.js');
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const hmrContents = env.driveHmr('test.ts', 'Cmp');
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expect(jsContents).toContain(`import * as i0 from "@angular/core";`);
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expect(jsContents).toContain('function Cmp_HmrLoad(t) {');
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expect(jsContents).toContain(
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'import(/* @vite-ignore */\n"/@ng/component?c=test.ts%40Cmp&t=" + encodeURIComponent(t))',
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);
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expect(jsContents).toContain(
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').then(m => m.default && i0.ɵɵreplaceMetadata(Cmp, m.default, [i0], ' +
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'[Dep, transformValue, TOKEN, Component, Inject, ViewChild, Input]));',
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);
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expect(jsContents).toContain('Cmp_HmrLoad(Date.now());');
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expect(jsContents).toContain(
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'import.meta.hot && import.meta.hot.on("angular:component-update", ' +
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'd => d.id === "test.ts%40Cmp" && Cmp_HmrLoad(d.timestamp)',
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);
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expect(hmrContents).toContain(
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'export default function Cmp_UpdateMetadata(Cmp, ɵɵnamespaces, Dep, transformValue, TOKEN, Component, Inject, ViewChild, Input) {',
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);
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expect(hmrContents).toContain(`const ɵhmr0 = ɵɵnamespaces[0];`);
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expect(hmrContents).toContain('Cmp.ɵfac = function Cmp_Factory');
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expect(hmrContents).toContain('Cmp.ɵcmp = /*@__PURE__*/ ɵhmr0.ɵɵdefineComponent');
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expect(hmrContents).toContain('ɵhmr0.ɵsetClassMetadata(Cmp,');
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expect(hmrContents).toContain('ɵhmr0.ɵsetClassDebugInfo(Cmp,');
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});
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it('should generate an HMR initializer and update function for a class that depends on multiple namespaces', () => {
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enableHmr();
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env.write(
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'dep.ts',
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`
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import {Directive, NgModule} from '@angular/core';
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@Directive({
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selector: '[dep]',
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standalone: true,
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})
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export class Dep {}
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@NgModule({
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imports: [Dep],
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exports: [Dep]
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})
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export class DepModule {}
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`,
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);
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env.write(
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'test.ts',
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`
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import {Component, ViewChild, Input, Inject} from '@angular/core';
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import {DepModule} from './dep';
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@Component({
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selector: 'cmp',
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standalone: true,
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template: '<div dep><div>',
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imports: [DepModule],
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})
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export class Cmp {}
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`,
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);
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env.driveMain();
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const jsContents = env.getContents('test.js');
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const hmrContents = env.driveHmr('test.ts', 'Cmp');
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expect(jsContents).toContain(`import * as i0 from "@angular/core";`);
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expect(jsContents).toContain(`import * as i1 from "./dep";`);
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expect(jsContents).toContain('function Cmp_HmrLoad(t) {');
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expect(jsContents).toContain(
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'import(/* @vite-ignore */\n"/@ng/component?c=test.ts%40Cmp&t=" + encodeURIComponent(t))',
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);
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expect(jsContents).toContain(
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').then(m => m.default && i0.ɵɵreplaceMetadata(Cmp, m.default, [i0, i1], ' +
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'[DepModule, Component]));',
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);
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expect(jsContents).toContain('Cmp_HmrLoad(Date.now());');
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expect(jsContents).toContain(
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'import.meta.hot && import.meta.hot.on("angular:component-update", ' +
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'd => d.id === "test.ts%40Cmp" && Cmp_HmrLoad(d.timestamp)',
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);
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expect(hmrContents).toContain(
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'export default function Cmp_UpdateMetadata(Cmp, ɵɵnamespaces, DepModule, Component) {',
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);
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expect(hmrContents).toContain(`const ɵhmr0 = ɵɵnamespaces[0];`);
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expect(hmrContents).toContain(`const ɵhmr1 = ɵɵnamespaces[1];`);
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expect(hmrContents).toContain('Cmp.ɵfac = function Cmp_Factory');
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expect(hmrContents).toContain('Cmp.ɵcmp = /*@__PURE__*/ ɵhmr0.ɵɵdefineComponent');
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expect(hmrContents).toContain('ɵhmr0.ɵsetClassMetadata(Cmp,');
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expect(hmrContents).toContain('ɵhmr0.ɵsetClassDebugInfo(Cmp,');
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expect(hmrContents).toContain('dependencies: [DepModule, ɵhmr1.Dep]');
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});
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it('should generate an HMR update function for a component that has embedded views', () => {
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enableHmr();
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env.write(
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'test.ts',
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`
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import {Component} from '@angular/core';
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@Component({
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selector: 'cmp',
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standalone: true,
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template: '@if (true) {hello}',
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})
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export class Cmp {}
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`,
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);
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const hmrContents = env.driveHmr('test.ts', 'Cmp');
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expect(hmrContents).toContain(
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'export default function Cmp_UpdateMetadata(Cmp, ɵɵnamespaces, Component) {',
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);
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expect(hmrContents).toContain('function Cmp_Conditional_0_Template(rf, ctx) {');
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expect(hmrContents).toContain('ɵhmr0.ɵɵtemplate(0, Cmp_Conditional_0_Template, 1, 0);');
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});
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it('should generate an HMR update function for a component whose definition produces variables', () => {
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enableHmr();
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env.write(
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'test.ts',
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`
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import {Component} from '@angular/core';
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@Component({
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selector: 'cmp',
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standalone: true,
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template: '<ng-content select="header"/><ng-content/>',
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})
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export class Cmp {}
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`,
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);
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const hmrContents = env.driveHmr('test.ts', 'Cmp');
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expect(hmrContents).toContain(
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'export default function Cmp_UpdateMetadata(Cmp, ɵɵnamespaces, Component) {',
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);
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expect(hmrContents).toContain('const _c0 = [[["header"]], "*"];');
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expect(hmrContents).toContain('const _c1 = ["header", "*"];');
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expect(hmrContents).toContain('ngContentSelectors: _c1');
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expect(hmrContents).toContain('ɵhmr0.ɵɵprojectionDef(_c0);');
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});
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it('should not defer dependencies when HMR is enabled', () => {
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enableHmr();
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env.write(
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'dep.ts',
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`
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import {Directive} from '@angular/core';
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@Directive({
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selector: '[dep]',
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standalone: true,
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})
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export class Dep {}
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`,
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);
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env.write(
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'test.ts',
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`
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import {Component} from '@angular/core';
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import {Dep} from './dep';
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@Component({
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selector: 'cmp',
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standalone: true,
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template: '@defer (on timer(1000)) {<div dep></div>}',
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imports: [Dep],
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})
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export class Cmp {}
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`,
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);
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env.driveMain();
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const jsContents = env.getContents('test.js');
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const hmrContents = env.driveHmr('test.ts', 'Cmp');
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expect(jsContents).toContain(`import { Dep } from './dep';`);
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expect(jsContents).toContain('const Cmp_Defer_1_DepsFn = () => [Dep];');
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expect(jsContents).toContain('function Cmp_Defer_0_Template(rf, ctx) { if (rf & 1) {');
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expect(jsContents).toContain('i0.ɵɵdefer(1, 0, Cmp_Defer_1_DepsFn);');
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expect(hmrContents).toContain(
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'export default function Cmp_UpdateMetadata(Cmp, ɵɵnamespaces, Component, Dep) {',
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);
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expect(hmrContents).toContain('const Cmp_Defer_1_DepsFn = () => [Dep];');
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expect(hmrContents).toContain('function Cmp_Defer_0_Template(rf, ctx) {');
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expect(hmrContents).toContain('ɵhmr0.ɵɵdefer(1, 0, Cmp_Defer_1_DepsFn);');
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expect(hmrContents).not.toContain('import(');
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});
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it('should not generate an HMR update function for a component that has errors', () => {
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enableHmr();
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env.write(
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'test.ts',
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`
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import {Component} from '@angular/core';
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@Component({
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selector: 'cmp',
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standalone: true,
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template: '{{#invalid}}',
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})
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export class Cmp {}
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`,
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);
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const hmrContents = env.driveHmr('test.ts', 'Cmp');
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expect(hmrContents).toBe(null);
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});
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it('should not generate an HMR update function for an Angular class that does not support HMR', () => {
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enableHmr();
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env.write(
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'test.ts',
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`
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import {Directive} from '@angular/core';
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@Component({
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selector: '[dir]',
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standalone: true
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})
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export class Dir {}
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`,
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);
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const hmrContents = env.driveHmr('test.ts', 'Dir');
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expect(hmrContents).toBe(null);
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});
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it('should not generate an HMR update function for an undecorated class', () => {
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enableHmr();
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env.write(
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'test.ts',
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`
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export class Foo {}
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`,
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);
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const hmrContents = env.driveHmr('test.ts', 'Foo');
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expect(hmrContents).toBe(null);
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});
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});
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});
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