angular-cn/packages/core/test/render3/outputs_spec.ts

462 lines
13 KiB
TypeScript

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