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angular-docs-cn/packages/core/test/render3/content_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 {C, D, E, P, T, V, c, dP, detectChanges, e, m, rC, rc, v} from '../../src/render3/index';
import {createComponent, renderComponent, toHtml} from './render_util';
describe('content projection', () => {
it('should project content', () => {
/**
* <div><ng-content></ng-content></div>
*/
const Child = createComponent('child', function(ctx: any, cm: boolean) {
if (cm) {
m(0, dP());
E(0, 'div');
{ P(1, 0); }
e();
}
});
/**
* <child>content</child>
*/
const Parent = createComponent('parent', function(ctx: any, cm: boolean) {
if (cm) {
E(0, Child.ngComponentDef);
{
D(0, Child.ngComponentDef.n(), Child.ngComponentDef);
T(1, 'content');
}
e();
}
Child.ngComponentDef.r(0, 0);
});
const parent = renderComponent(Parent);
expect(toHtml(parent)).toEqual('<child><div>content</div></child>');
});
it('should project content when root.', () => {
const Child = createComponent('child', function(ctx: any, cm: boolean) {
if (cm) {
m(0, dP());
P(0, 0);
}
});
const Parent = createComponent('parent', function(ctx: any, cm: boolean) {
if (cm) {
E(0, Child.ngComponentDef);
{
D(0, Child.ngComponentDef.n(), Child.ngComponentDef);
T(1, 'content');
}
e();
}
Child.ngComponentDef.r(0, 0);
});
const parent = renderComponent(Parent);
expect(toHtml(parent)).toEqual('<child>content</child>');
});
it('should re-project content when root.', () => {
const GrandChild = createComponent('grand-child', function(ctx: any, cm: boolean) {
if (cm) {
m(0, dP());
E(0, 'div');
{ P(1, 0); }
e();
}
});
const Child = createComponent('child', function(ctx: any, cm: boolean) {
if (cm) {
m(0, dP());
E(0, GrandChild.ngComponentDef);
{
D(0, GrandChild.ngComponentDef.n(), GrandChild.ngComponentDef);
P(1, 0);
}
e();
GrandChild.ngComponentDef.r(0, 0);
}
});
const Parent = createComponent('parent', function(ctx: any, cm: boolean) {
if (cm) {
E(0, Child.ngComponentDef);
{
D(0, Child.ngComponentDef.n(), Child.ngComponentDef);
E(1, 'b');
T(2, 'Hello');
e();
T(3, 'World!');
}
e();
}
Child.ngComponentDef.r(0, 0);
});
const parent = renderComponent(Parent);
expect(toHtml(parent))
.toEqual('<child><grand-child><div><b>Hello</b>World!</div></grand-child></child>');
});
it('should project content with container.', () => {
const Child = createComponent('child', function(ctx: any, cm: boolean) {
if (cm) {
m(0, dP());
E(0, 'div');
{ P(1, 0); }
e();
}
});
const Parent = createComponent('parent', function(ctx: {value: any}, cm: boolean) {
if (cm) {
E(0, Child.ngComponentDef);
{
D(0, Child.ngComponentDef.n(), Child.ngComponentDef);
T(1, '(');
C(2);
c();
T(3, ')');
}
e();
}
rC(2);
{
if (ctx.value) {
if (V(0)) {
T(0, 'content');
}
v();
}
}
rc();
Child.ngComponentDef.r(0, 0);
});
const parent = renderComponent(Parent);
expect(toHtml(parent)).toEqual('<child><div>()</div></child>');
parent.value = true;
detectChanges(parent);
expect(toHtml(parent)).toEqual('<child><div>(content)</div></child>');
parent.value = false;
detectChanges(parent);
expect(toHtml(parent)).toEqual('<child><div>()</div></child>');
});
it('should project content with container and if-else.', () => {
const Child = createComponent('child', function(ctx: any, cm: boolean) {
if (cm) {
m(0, dP());
E(0, 'div');
{ P(1, 0); }
e();
}
});
const Parent = createComponent('parent', function(ctx: {value: any}, cm: boolean) {
if (cm) {
E(0, Child.ngComponentDef);
{
D(0, Child.ngComponentDef.n(), Child.ngComponentDef);
T(1, '(');
C(2);
c();
T(3, ')');
}
e();
}
rC(2);
{
if (ctx.value) {
if (V(0)) {
T(0, 'content');
}
v();
} else {
if (V(1)) {
T(0, 'else');
}
v();
}
}
rc();
Child.ngComponentDef.r(0, 0);
});
const parent = renderComponent(Parent);
expect(toHtml(parent)).toEqual('<child><div>(else)</div></child>');
parent.value = true;
detectChanges(parent);
expect(toHtml(parent)).toEqual('<child><div>(content)</div></child>');
parent.value = false;
detectChanges(parent);
expect(toHtml(parent)).toEqual('<child><div>(else)</div></child>');
});
it('should support projection in embedded views', () => {
let childCmptInstance: any;
/**
* <div>
* % if (!skipContent) {
* <span>
* <ng-content></ng-content>
* </span>
* % }
* </div>
*/
const Child = createComponent('child', function(ctx: any, cm: boolean) {
if (cm) {
m(0, dP());
E(0, 'div');
{
C(1);
c();
}
e();
}
rC(1);
{
if (!ctx.skipContent) {
if (V(0)) {
E(0, 'span');
P(1, 0);
e();
}
v();
}
}
rc();
});
/**
* <child>content</child>
*/
const Parent = createComponent('parent', function(ctx: any, cm: boolean) {
if (cm) {
E(0, Child.ngComponentDef);
{
D(0, childCmptInstance = Child.ngComponentDef.n(), Child.ngComponentDef);
T(1, 'content');
}
e();
}
Child.ngComponentDef.r(0, 0);
});
const parent = renderComponent(Parent);
expect(toHtml(parent)).toEqual('<child><div><span>content</span></div></child>');
childCmptInstance.skipContent = true;
detectChanges(parent);
expect(toHtml(parent)).toEqual('<child><div></div></child>');
});
it('should support projection in embedded views when ng-content is a root node of an embedded view',
() => {
let childCmptInstance: any;
/**
* <div>
* % if (!skipContent) {
* <ng-content></ng-content>
* % }
* </div>
*/
const Child = createComponent('child', function(ctx: any, cm: boolean) {
if (cm) {
m(0, dP());
E(0, 'div');
{
C(1);
c();
}
e();
}
rC(1);
{
if (!ctx.skipContent) {
if (V(0)) {
P(0, 0);
}
v();
}
}
rc();
});
/**
* <child>content</child>
*/
const Parent = createComponent('parent', function(ctx: any, cm: boolean) {
if (cm) {
E(0, Child.ngComponentDef);
{
D(0, childCmptInstance = Child.ngComponentDef.n(), Child.ngComponentDef);
T(1, 'content');
}
e();
}
Child.ngComponentDef.r(0, 0);
});
const parent = renderComponent(Parent);
expect(toHtml(parent)).toEqual('<child><div>content</div></child>');
childCmptInstance.skipContent = true;
detectChanges(parent);
expect(toHtml(parent)).toEqual('<child><div></div></child>');
});
it('should project nodes into the last ng-content', () => {
/**
* <div><ng-content></ng-content></div>
* <span><ng-content></ng-content></span>
*/
const Child = createComponent('child', function(ctx: any, cm: boolean) {
if (cm) {
m(0, dP());
E(0, 'div');
{ P(1, 0); }
e();
E(2, 'span');
{ P(3, 0); }
e();
}
});
/**
* <child>content</child>
*/
const Parent = createComponent('parent', function(ctx: any, cm: boolean) {
if (cm) {
E(0, Child.ngComponentDef);
{
D(0, Child.ngComponentDef.n(), Child.ngComponentDef);
T(1, 'content');
}
e();
}
Child.ngComponentDef.r(0, 0);
});
const parent = renderComponent(Parent);
expect(toHtml(parent)).toEqual('<child><div></div><span>content</span></child>');
});
/**
* Warning: this test is _not_ in-line with what Angular does atm.
* Moreover the current implementation logic will result in DOM nodes
* being re-assigned from one parent to another. Proposal: have compiler
* to remove all but the latest occurrence of <ng-content> so we generate
* only one P(n, m, 0) instruction. It would make it consistent with the
* current Angular behaviour:
* http://plnkr.co/edit/OAYkNawTDPkYBFTqovTP?p=preview
*/
it('should project nodes into the last available ng-content', () => {
let childCmptInstance: any;
/**
* <ng-content></ng-content>
* <div>
* % if (show) {
* <ng-content></ng-content>
* % }
* </div>
*/
const Child = createComponent('child', function(ctx: any, cm: boolean) {
if (cm) {
m(0, dP());
P(0, 0);
E(1, 'div');
{
C(2);
c();
}
e();
}
rC(2);
{
if (ctx.show) {
if (V(0)) {
P(0, 0);
}
v();
}
}
rc();
});
/**
* <child>content</child>
*/
const Parent = createComponent('parent', function(ctx: any, cm: boolean) {
if (cm) {
E(0, Child.ngComponentDef);
{
D(0, childCmptInstance = Child.ngComponentDef.n(), Child.ngComponentDef);
T(1, 'content');
}
e();
}
Child.ngComponentDef.r(0, 0);
});
const parent = renderComponent(Parent);
expect(toHtml(parent)).toEqual('<child>content<div></div></child>');
childCmptInstance.show = true;
detectChanges(parent);
expect(toHtml(parent)).toEqual('<child><div>content</div></child>');
});
describe('with selectors', () => {
it('should project nodes using attribute selectors', () => {
/**
* <div id="first"><ng-content select="span[title=toFirst]"></ng-content></div>
* <div id="second"><ng-content select="span[title=toSecond]"></ng-content></div>
*/
const Child = createComponent('child', function(ctx: any, cm: boolean) {
if (cm) {
m(0,
dP([[[['span', 'title', 'toFirst'], null]], [[['span', 'title', 'toSecond'], null]]]));
E(0, 'div', ['id', 'first']);
{ P(1, 0, 1); }
e();
E(2, 'div', ['id', 'second']);
{ P(3, 0, 2); }
e();
}
});
/**
* <child>
* <span title="toFirst">1</span>
* <span title="toSecond">2</span>
* </child>
*/
const Parent = createComponent('parent', function(ctx: any, cm: boolean) {
if (cm) {
E(0, Child.ngComponentDef);
{
D(0, Child.ngComponentDef.n(), Child.ngComponentDef);
E(1, 'span', ['title', 'toFirst']);
{ T(2, '1'); }
e();
E(3, 'span', ['title', 'toSecond']);
{ T(4, '2'); }
e();
}
e();
}
Child.ngComponentDef.r(0, 0);
});
const parent = renderComponent(Parent);
expect(toHtml(parent))
.toEqual(
'<child><div id="first"><span title="toFirst">1</span></div><div id="second"><span title="toSecond">2</span></div></child>');
});
it('should project nodes using class selectors', () => {
/**
* <div id="first"><ng-content select="span.toFirst"></ng-content></div>
* <div id="second"><ng-content select="span.toSecond"></ng-content></div>
*/
const Child = createComponent('child', function(ctx: any, cm: boolean) {
if (cm) {
m(0,
dP([[[['span', 'class', 'toFirst'], null]], [[['span', 'class', 'toSecond'], null]]]));
E(0, 'div', ['id', 'first']);
{ P(1, 0, 1); }
e();
E(2, 'div', ['id', 'second']);
{ P(3, 0, 2); }
e();
}
});
/**
* <child>
* <span class="toFirst">1</span>
* <span class="toSecond">2</span>
* </child>
*/
const Parent = createComponent('parent', function(ctx: any, cm: boolean) {
if (cm) {
E(0, Child.ngComponentDef);
{
D(0, Child.ngComponentDef.n(), Child.ngComponentDef);
E(1, 'span', ['class', 'toFirst']);
{ T(2, '1'); }
e();
E(3, 'span', ['class', 'toSecond']);
{ T(4, '2'); }
e();
}
e();
}
Child.ngComponentDef.r(0, 0);
});
const parent = renderComponent(Parent);
expect(toHtml(parent))
.toEqual(
'<child><div id="first"><span class="toFirst">1</span></div><div id="second"><span class="toSecond">2</span></div></child>');
});
it('should project nodes using class selectors when element has multiple classes', () => {
/**
* <div id="first"><ng-content select="span.toFirst"></ng-content></div>
* <div id="second"><ng-content select="span.toSecond"></ng-content></div>
*/
const Child = createComponent('child', function(ctx: any, cm: boolean) {
if (cm) {
m(0,
dP([[[['span', 'class', 'toFirst'], null]], [[['span', 'class', 'toSecond'], null]]]));
E(0, 'div', ['id', 'first']);
{ P(1, 0, 1); }
e();
E(2, 'div', ['id', 'second']);
{ P(3, 0, 2); }
e();
}
});
/**
* <child>
* <span class="other toFirst">1</span>
* <span class="toSecond noise">2</span>
* </child>
*/
const Parent = createComponent('parent', function(ctx: any, cm: boolean) {
if (cm) {
E(0, Child.ngComponentDef);
{
D(0, Child.ngComponentDef.n(), Child.ngComponentDef);
E(1, 'span', ['class', 'other toFirst']);
{ T(2, '1'); }
e();
E(3, 'span', ['class', 'toSecond noise']);
{ T(4, '2'); }
e();
}
e();
}
Child.ngComponentDef.r(0, 0);
});
const parent = renderComponent(Parent);
expect(toHtml(parent))
.toEqual(
'<child><div id="first"><span class="other toFirst">1</span></div><div id="second"><span class="toSecond noise">2</span></div></child>');
});
it('should project nodes into the first matching selector', () => {
/**
* <div id="first"><ng-content select="span"></ng-content></div>
* <div id="second"><ng-content select="span.toSecond"></ng-content></div>
*/
const Child = createComponent('child', function(ctx: any, cm: boolean) {
if (cm) {
m(0, dP([[[['span'], null]], [[['span', 'class', 'toSecond'], null]]]));
E(0, 'div', ['id', 'first']);
{ P(1, 0, 1); }
e();
E(2, 'div', ['id', 'second']);
{ P(3, 0, 2); }
e();
}
});
/**
* <child>
* <span class="toFirst">1</span>
* <span class="toSecond">2</span>
* </child>
*/
const Parent = createComponent('parent', function(ctx: any, cm: boolean) {
if (cm) {
E(0, Child.ngComponentDef);
{
D(0, Child.ngComponentDef.n(), Child.ngComponentDef);
E(1, 'span', ['class', 'toFirst']);
{ T(2, '1'); }
e();
E(3, 'span', ['class', 'toSecond']);
{ T(4, '2'); }
e();
}
e();
}
Child.ngComponentDef.r(0, 0);
});
const parent = renderComponent(Parent);
expect(toHtml(parent))
.toEqual(
'<child><div id="first"><span class="toFirst">1</span><span class="toSecond">2</span></div><div id="second"></div></child>');
});
it('should allow mixing ng-content with and without selectors', () => {
/**
* <div id="first"><ng-content select="span.toFirst"></ng-content></div>
* <div id="second"><ng-content></ng-content></div>
*/
const Child = createComponent('child', function(ctx: any, cm: boolean) {
if (cm) {
m(0, dP([[[['span', 'class', 'toFirst'], null]]]));
E(0, 'div', ['id', 'first']);
{ P(1, 0, 1); }
e();
E(2, 'div', ['id', 'second']);
{ P(3, 0); }
e();
}
});
/**
* <child>
* <span class="other toFirst">1</span>
* <span class="toSecond noise">2</span>
* </child>
*/
const Parent = createComponent('parent', function(ctx: any, cm: boolean) {
if (cm) {
E(0, Child.ngComponentDef);
{
D(0, Child.ngComponentDef.n(), Child.ngComponentDef);
E(1, 'span', ['class', 'toFirst']);
{ T(2, '1'); }
e();
E(3, 'span');
{ T(4, 'remaining'); }
e();
T(5, 'more remaining');
}
e();
}
Child.ngComponentDef.r(0, 0);
});
const parent = renderComponent(Parent);
expect(toHtml(parent))
.toEqual(
'<child><div id="first"><span class="toFirst">1</span></div><div id="second"><span>remaining</span>more remaining</div></child>');
});
it('should allow mixing ng-content with and without selectors - ng-content first', () => {
/**
* <div id="first"><ng-content></ng-content></div>
* <div id="second"><ng-content select="span.toSecond"></ng-content></div>
*/
const Child = createComponent('child', function(ctx: any, cm: boolean) {
if (cm) {
m(0, dP([[[['span', 'class', 'toSecond'], null]]]));
E(0, 'div', ['id', 'first']);
{ P(1, 0); }
e();
E(2, 'div', ['id', 'second']);
{ P(3, 0, 1); }
e();
}
});
/**
* <child>
* <span>1</span>
* <span class="toSecond">2</span>
* remaining
* </child>
*/
const Parent = createComponent('parent', function(ctx: any, cm: boolean) {
if (cm) {
E(0, Child.ngComponentDef);
{
D(0, Child.ngComponentDef.n(), Child.ngComponentDef);
E(1, 'span');
{ T(2, '1'); }
e();
E(3, 'span', ['class', 'toSecond']);
{ T(4, '2'); }
e();
T(5, 'remaining');
}
e();
}
Child.ngComponentDef.r(0, 0);
});
const parent = renderComponent(Parent);
expect(toHtml(parent))
.toEqual(
'<child><div id="first"><span>1</span>remaining</div><div id="second"><span class="toSecond">2</span></div></child>');
});
/**
* Descending into projected content for selector-matching purposes is not supported
* today: http://plnkr.co/edit/MYQcNfHSTKp9KvbzJWVQ?p=preview
*/
it('should not match selectors on re-projected content', () => {
/**
* <ng-content select="span"></ng-content>
* <hr>
* <ng-content></ng-content>
*/
const GrandChild = createComponent('grand-child', function(ctx: any, cm: boolean) {
if (cm) {
m(0, dP([[[['span'], null]]]));
P(0, 0, 1);
E(1, 'hr');
e();
P(2, 0, 0);
}
});
/**
* <grand-child>
* <ng-content></ng-content>
* <span>in child template</span>
* </grand-child>
*/
const Child = createComponent('child', function(ctx: any, cm: boolean) {
if (cm) {
m(0, dP());
E(0, GrandChild.ngComponentDef);
{
D(0, GrandChild.ngComponentDef.n(), GrandChild.ngComponentDef);
P(1, 0);
E(2, 'span');
{ T(3, 'in child template'); }
e();
}
e();
GrandChild.ngComponentDef.r(0, 0);
}
});
/**
* <child>
* <div>
* parent content
* </div>
* </child>
*/
const Parent = createComponent('parent', function(ctx: any, cm: boolean) {
if (cm) {
E(0, Child.ngComponentDef);
{
D(0, Child.ngComponentDef.n(), Child.ngComponentDef);
E(1, 'span');
{ T(2, 'parent content'); }
e();
}
e();
}
Child.ngComponentDef.r(0, 0);
});
const parent = renderComponent(Parent);
expect(toHtml(parent))
.toEqual(
'<child><grand-child><span>in child template</span><hr><span>parent content</span></grand-child></child>');
});
it('should match selectors against projected containers', () => {
/**
* <span>
* <ng-content select="div"></ng-content>
* </span>
*/
const Child = createComponent('child', function(ctx: any, cm: boolean) {
if (cm) {
m(0, dP([[[['div'], null]]]));
E(0, 'span');
{ P(1, 0, 1); }
e();
}
});
/**
* <child>
* <div *ngIf="true">content</div>
* </child>
*/
const Parent = createComponent('parent', function(ctx: {value: any}, cm: boolean) {
if (cm) {
E(0, Child.ngComponentDef);
{
D(0, Child.ngComponentDef.n(), Child.ngComponentDef);
C(1, undefined, 'div');
c();
}
e();
}
rC(1);
{
if (true) {
if (V(0)) {
E(0, 'div');
{ T(1, 'content'); }
e();
}
v();
}
}
rc();
Child.ngComponentDef.r(0, 0);
});
const parent = renderComponent(Parent);
expect(toHtml(parent)).toEqual('<child><span><div>content</div></span></child>');
});
});
});
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