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

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/**
* @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 {ɵɵdefineComponent, ɵɵdefineDirective} from '../../src/render3/index';
import {ɵɵcontainer, ɵɵcontainerRefreshEnd, ɵɵcontainerRefreshStart, ɵɵelementEnd, ɵɵelementStart, ɵɵembeddedViewEnd, ɵɵembeddedViewStart, ɵɵlistener, ɵɵtext} from '../../src/render3/instructions/all';
import {RenderFlags} from '../../src/render3/interfaces/definition';
import {renderToHtml} from './render_util';
describe('outputs', () => {
let buttonToggle: ButtonToggle;
class ButtonToggle {
change = new EventEmitter();
resetStream = new EventEmitter();
static ɵfac = () => buttonToggle = new ButtonToggle();
static ɵcmp = ɵɵdefineComponent({
type: ButtonToggle,
selectors: [['button-toggle']],
template: function(rf: RenderFlags, ctx: any) {},
decls: 0,
vars: 0,
outputs: {change: 'change', resetStream: 'reset'}
});
}
let otherDir: OtherDir;
class OtherDir {
changeStream = new EventEmitter();
static ɵfac = () => otherDir = new OtherDir;
static ɵdir = ɵɵdefineDirective(
{type: OtherDir, selectors: [['', 'otherDir', '']], outputs: {changeStream: 'change'}});
}
const deps = [ButtonToggle, OtherDir];
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) {
ɵɵelementStart(0, 'button');
{
ɵɵlistener('click', function() { return ctx.onClick(); });
ɵɵtext(1, 'Click me');
}
ɵɵelementEnd();
ɵɵcontainer(2);
}
if (rf & RenderFlags.Update) {
ɵɵcontainerRefreshStart(2);
{
if (ctx.condition) {
let rf1 = ɵɵembeddedViewStart(0, 1, 0);
if (rf1 & RenderFlags.Create) {
ɵɵelementStart(0, 'button-toggle');
{
ɵɵlistener('change', function() { return ctx.onChange(); });
}
ɵɵelementEnd();
}
ɵɵembeddedViewEnd();
} else {
if (ɵɵembeddedViewStart(1, 1, 0)) {
ɵɵelementStart(0, 'div', 0);
{
ɵɵlistener('change', function() { return ctx.onChange(); });
}
ɵɵelementEnd();
}
ɵɵembeddedViewEnd();
}
}
ɵɵcontainerRefreshEnd();
}
}
let counter = 0;
const ctx = {condition: true, onChange: () => counter++, onClick: () => {}};
const attrs = [['otherDir', '']];
renderToHtml(Template, ctx, 3, 0, deps, null, null, false, attrs);
buttonToggle !.change.next();
expect(counter).toEqual(1);
ctx.condition = false;
renderToHtml(Template, ctx, 3, 0, deps, null, null, false, attrs);
expect(counter).toEqual(1);
otherDir !.changeStream.next();
expect(counter).toEqual(2);
});
});