462 lines
13 KiB
TypeScript
462 lines
13 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 {EventEmitter} from '@angular/core';
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import {defineComponent, defineDirective} from '../../src/render3/index';
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import {bind, container, containerRefreshEnd, containerRefreshStart, elementEnd, elementProperty, elementStart, embeddedViewEnd, embeddedViewStart, listener, text} from '../../src/render3/instructions';
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import {RenderFlags} from '../../src/render3/interfaces/definition';
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import {containerEl, renderToHtml} from './render_util';
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describe('outputs', () => {
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let buttonToggle: ButtonToggle;
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let destroyComp: DestroyComp;
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let buttonDir: MyButton;
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class ButtonToggle {
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change = new EventEmitter();
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resetStream = new EventEmitter();
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static ngComponentDef = defineComponent({
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type: ButtonToggle,
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selectors: [['button-toggle']],
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template: function(rf: RenderFlags, ctx: any) {},
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factory: () => buttonToggle = new ButtonToggle(),
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outputs: {change: 'change', resetStream: 'reset'}
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});
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}
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let otherDir: OtherDir;
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class OtherDir {
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changeStream = new EventEmitter();
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static ngDirectiveDef = defineDirective({
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type: OtherDir,
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selectors: [['', 'otherDir', '']],
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factory: () => otherDir = new OtherDir,
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outputs: {changeStream: 'change'}
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});
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}
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class DestroyComp {
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events: string[] = [];
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ngOnDestroy() { this.events.push('destroy'); }
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static ngComponentDef = defineComponent({
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type: DestroyComp,
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selectors: [['destroy-comp']],
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template: function(rf: RenderFlags, ctx: any) {},
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factory: () => destroyComp = new DestroyComp()
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});
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}
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/** <button myButton (click)="onClick()">Click me</button> */
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class MyButton {
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click = new EventEmitter();
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static ngDirectiveDef = defineDirective({
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type: MyButton,
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selectors: [['', 'myButton', '']],
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factory: () => buttonDir = new MyButton,
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outputs: {click: 'click'}
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});
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}
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const deps = [ButtonToggle, OtherDir, DestroyComp, MyButton];
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it('should call component output function when event is emitted', () => {
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/** <button-toggle (change)="onChange()"></button-toggle> */
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function Template(rf: RenderFlags, ctx: any) {
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if (rf & RenderFlags.Create) {
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elementStart(0, 'button-toggle');
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{
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listener('change', function() { return ctx.onChange(); });
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}
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elementEnd();
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}
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}
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let counter = 0;
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const ctx = {onChange: () => counter++};
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renderToHtml(Template, ctx, deps);
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buttonToggle !.change.next();
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expect(counter).toEqual(1);
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buttonToggle !.change.next();
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expect(counter).toEqual(2);
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});
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it('should support more than 1 output function on the same node', () => {
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/** <button-toggle (change)="onChange()" (reset)="onReset()"></button-toggle> */
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function Template(rf: RenderFlags, ctx: any) {
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if (rf & RenderFlags.Create) {
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elementStart(0, 'button-toggle');
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{
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listener('change', function() { return ctx.onChange(); });
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listener('reset', function() { return ctx.onReset(); });
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}
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elementEnd();
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}
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}
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let counter = 0;
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let resetCounter = 0;
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const ctx = {onChange: () => counter++, onReset: () => resetCounter++};
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renderToHtml(Template, ctx, deps);
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buttonToggle !.change.next();
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expect(counter).toEqual(1);
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buttonToggle !.resetStream.next();
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expect(resetCounter).toEqual(1);
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});
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it('should eval component output expression when event is emitted', () => {
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/** <button-toggle (change)="counter++"></button-toggle> */
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function Template(rf: RenderFlags, ctx: any) {
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if (rf & RenderFlags.Create) {
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elementStart(0, 'button-toggle');
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{
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listener('change', function() { return ctx.counter++; });
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}
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elementEnd();
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}
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}
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const ctx = {counter: 0};
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renderToHtml(Template, ctx, deps);
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buttonToggle !.change.next();
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expect(ctx.counter).toEqual(1);
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buttonToggle !.change.next();
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expect(ctx.counter).toEqual(2);
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});
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it('should unsubscribe from output when view is destroyed', () => {
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/**
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* % if (condition) {
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* <button-toggle (change)="onChange()"></button-toggle>
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* % }
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*/
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function Template(rf: RenderFlags, ctx: any) {
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if (rf & RenderFlags.Create) {
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container(0);
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}
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if (rf & RenderFlags.Update) {
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containerRefreshStart(0);
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{
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if (ctx.condition) {
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let rf1 = embeddedViewStart(0);
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if (rf1 & RenderFlags.Create) {
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elementStart(0, 'button-toggle');
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{
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listener('change', function() { return ctx.onChange(); });
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}
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elementEnd();
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}
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embeddedViewEnd();
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}
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}
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containerRefreshEnd();
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}
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}
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let counter = 0;
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const ctx = {onChange: () => counter++, condition: true};
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renderToHtml(Template, ctx, deps);
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buttonToggle !.change.next();
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expect(counter).toEqual(1);
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ctx.condition = false;
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renderToHtml(Template, ctx, deps);
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buttonToggle !.change.next();
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expect(counter).toEqual(1);
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});
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it('should unsubscribe from output in nested view', () => {
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/**
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* % if (condition) {
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* % if (condition2) {
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* <button-toggle (change)="onChange()"></button-toggle>
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* % }
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* % }
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*/
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function Template(rf: RenderFlags, ctx: any) {
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if (rf & RenderFlags.Create) {
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container(0);
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}
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if (rf & RenderFlags.Update) {
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containerRefreshStart(0);
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{
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if (ctx.condition) {
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let rf1 = embeddedViewStart(0);
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if (rf1 & RenderFlags.Create) {
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container(0);
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}
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containerRefreshStart(0);
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{
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if (ctx.condition2) {
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let rf1 = embeddedViewStart(0);
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if (rf1 & RenderFlags.Create) {
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elementStart(0, 'button-toggle');
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{
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listener('change', function() { return ctx.onChange(); });
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}
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elementEnd();
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}
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embeddedViewEnd();
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}
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}
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containerRefreshEnd();
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embeddedViewEnd();
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}
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}
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containerRefreshEnd();
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}
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}
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let counter = 0;
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const ctx = {onChange: () => counter++, condition: true, condition2: true};
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renderToHtml(Template, ctx, deps);
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buttonToggle !.change.next();
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expect(counter).toEqual(1);
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ctx.condition = false;
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renderToHtml(Template, ctx, deps);
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buttonToggle !.change.next();
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expect(counter).toEqual(1);
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});
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it('should work properly when view also has listeners and destroys', () => {
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/**
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* % if (condition) {
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* <button (click)="onClick()">Click me</button>
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* <button-toggle (change)="onChange()"></button-toggle>
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* <destroy-comp></destroy-comp>
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* % }
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*/
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function Template(rf: RenderFlags, ctx: any) {
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if (rf & RenderFlags.Create) {
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container(0);
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}
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if (rf & RenderFlags.Update) {
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containerRefreshStart(0);
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{
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if (ctx.condition) {
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let rf1 = embeddedViewStart(0);
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if (rf1 & RenderFlags.Create) {
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elementStart(0, 'button');
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{
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listener('click', function() { return ctx.onClick(); });
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text(1, 'Click me');
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}
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elementEnd();
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elementStart(2, 'button-toggle');
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{
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listener('change', function() { return ctx.onChange(); });
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}
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elementEnd();
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elementStart(3, 'destroy-comp');
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elementEnd();
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}
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embeddedViewEnd();
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}
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}
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containerRefreshEnd();
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}
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}
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let clickCounter = 0;
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let changeCounter = 0;
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const ctx = {condition: true, onChange: () => changeCounter++, onClick: () => clickCounter++};
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renderToHtml(Template, ctx, deps);
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buttonToggle !.change.next();
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expect(changeCounter).toEqual(1);
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expect(clickCounter).toEqual(0);
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const button = containerEl.querySelector('button');
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button !.click();
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expect(changeCounter).toEqual(1);
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expect(clickCounter).toEqual(1);
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ctx.condition = false;
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renderToHtml(Template, ctx, deps);
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expect(destroyComp !.events).toEqual(['destroy']);
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buttonToggle !.change.next();
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button !.click();
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expect(changeCounter).toEqual(1);
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expect(clickCounter).toEqual(1);
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});
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it('should fire event listeners along with outputs if they match', () => {
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function Template(rf: RenderFlags, ctx: any) {
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if (rf & RenderFlags.Create) {
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elementStart(0, 'button', ['myButton', '']);
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{
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listener('click', function() { return ctx.onClick(); });
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}
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elementEnd();
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}
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}
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let counter = 0;
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renderToHtml(Template, {counter, onClick: () => counter++}, deps);
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// To match current Angular behavior, the click listener is still
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// set up in addition to any matching outputs.
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const button = containerEl.querySelector('button') !;
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button.click();
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expect(counter).toEqual(1);
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buttonDir !.click.next();
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expect(counter).toEqual(2);
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});
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it('should work with two outputs of the same name', () => {
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/** <button-toggle (change)="onChange()" otherDir></button-toggle> */
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function Template(rf: RenderFlags, ctx: any) {
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if (rf & RenderFlags.Create) {
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elementStart(0, 'button-toggle', ['otherDir', '']);
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{
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listener('change', function() { return ctx.onChange(); });
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}
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elementEnd();
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}
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}
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let counter = 0;
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renderToHtml(Template, {counter, onChange: () => counter++}, deps);
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buttonToggle !.change.next();
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expect(counter).toEqual(1);
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otherDir !.changeStream.next();
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expect(counter).toEqual(2);
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});
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it('should work with an input and output of the same name', () => {
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let otherDir: OtherChangeDir;
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class OtherChangeDir {
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// TODO(issue/24571): remove '!'.
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change !: boolean;
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static ngDirectiveDef = defineDirective({
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type: OtherChangeDir,
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selectors: [['', 'otherChangeDir', '']],
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factory: () => otherDir = new OtherChangeDir,
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inputs: {change: 'change'}
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});
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}
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/** <button-toggle (change)="onChange()" otherChangeDir [change]="change"></button-toggle> */
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function Template(rf: RenderFlags, ctx: any) {
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if (rf & RenderFlags.Create) {
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elementStart(0, 'button-toggle', ['otherChangeDir', '']);
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{
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listener('change', function() { return ctx.onChange(); });
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}
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elementEnd();
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}
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if (rf & RenderFlags.Update) {
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elementProperty(0, 'change', bind(ctx.change));
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}
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}
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let counter = 0;
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const deps = [ButtonToggle, OtherChangeDir];
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renderToHtml(Template, {counter, onChange: () => counter++, change: true}, deps);
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expect(otherDir !.change).toEqual(true);
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renderToHtml(Template, {counter, onChange: () => counter++, change: false}, deps);
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expect(otherDir !.change).toEqual(false);
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buttonToggle !.change.next();
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expect(counter).toEqual(1);
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});
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it('should work with outputs at same index in if block', () => {
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/**
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* <button (click)="onClick()">Click me</button> // outputs: null
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* % if (condition) {
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* <button-toggle (change)="onChange()"></button-toggle> // outputs: {change: [0, 'change']}
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* % } else {
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* <div otherDir (change)="onChange()"></div> // outputs: {change: [0,
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* 'changeStream']}
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* % }
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*/
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function Template(rf: RenderFlags, ctx: any) {
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if (rf & RenderFlags.Create) {
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elementStart(0, 'button');
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{
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listener('click', function() { return ctx.onClick(); });
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text(1, 'Click me');
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}
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elementEnd();
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container(2);
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}
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if (rf & RenderFlags.Update) {
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containerRefreshStart(2);
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{
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if (ctx.condition) {
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let rf1 = embeddedViewStart(0);
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if (rf1 & RenderFlags.Create) {
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elementStart(0, 'button-toggle');
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{
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listener('change', function() { return ctx.onChange(); });
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}
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elementEnd();
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}
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embeddedViewEnd();
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} else {
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if (embeddedViewStart(1)) {
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elementStart(0, 'div', ['otherDir', '']);
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{
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listener('change', function() { return ctx.onChange(); });
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}
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elementEnd();
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}
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embeddedViewEnd();
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}
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}
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containerRefreshEnd();
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}
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}
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let counter = 0;
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const ctx = {condition: true, onChange: () => counter++, onClick: () => {}};
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renderToHtml(Template, ctx, deps);
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buttonToggle !.change.next();
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expect(counter).toEqual(1);
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ctx.condition = false;
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renderToHtml(Template, ctx, deps);
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expect(counter).toEqual(1);
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otherDir !.changeStream.next();
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expect(counter).toEqual(2);
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});
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});
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