angular-docs-cn/modules/angular2/test/directives/ng_for_spec.ts

257 lines
8.8 KiB
TypeScript

import {
AsyncTestCompleter,
beforeEach,
beforeEachBindings,
ddescribe,
describe,
el,
expect,
iit,
inject,
it,
xit,
} from 'angular2/test_lib';
import {DOM} from 'angular2/src/dom/dom_adapter';
import {ListWrapper} from 'angular2/src/facade/collection';
import {Component, View} from 'angular2/angular2';
import {NgFor} from 'angular2/src/directives/ng_for';
import {TestBed} from 'angular2/src/test_lib/test_bed';
export function main() {
describe('ng-for', () => {
var TEMPLATE =
'<div><copy-me template="ng-for #item of items">{{item.toString()}};</copy-me></div>';
it('should reflect initial elements',
inject([TestBed, AsyncTestCompleter], (tb: TestBed, async) => {
tb.createView(TestComponent, {html: TEMPLATE})
.then((view) => {
view.detectChanges();
expect(DOM.getText(view.rootNodes[0])).toEqual('1;2;');
async.done();
});
}));
it('should reflect added elements',
inject([TestBed, AsyncTestCompleter], (tb: TestBed, async) => {
tb.createView(TestComponent, {html: TEMPLATE})
.then((view) => {
view.detectChanges();
ListWrapper.push(view.context.items, 3);
view.detectChanges();
expect(DOM.getText(view.rootNodes[0])).toEqual('1;2;3;');
async.done();
});
}));
it('should reflect removed elements',
inject([TestBed, AsyncTestCompleter], (tb: TestBed, async) => {
tb.createView(TestComponent, {html: TEMPLATE})
.then((view) => {
view.detectChanges();
ListWrapper.removeAt(view.context.items, 1);
view.detectChanges();
expect(DOM.getText(view.rootNodes[0])).toEqual('1;');
async.done();
});
}));
it('should reflect moved elements',
inject([TestBed, AsyncTestCompleter], (tb: TestBed, async) => {
tb.createView(TestComponent, {html: TEMPLATE})
.then((view) => {
view.detectChanges();
ListWrapper.removeAt(view.context.items, 0);
ListWrapper.push(view.context.items, 1);
view.detectChanges();
expect(DOM.getText(view.rootNodes[0])).toEqual('2;1;');
async.done();
});
}));
it('should reflect a mix of all changes (additions/removals/moves)',
inject([TestBed, AsyncTestCompleter], (tb: TestBed, async) => {
tb.createView(TestComponent, {html: TEMPLATE})
.then((view) => {
view.context.items = [0, 1, 2, 3, 4, 5];
view.detectChanges();
view.context.items = [6, 2, 7, 0, 4, 8];
view.detectChanges();
expect(DOM.getText(view.rootNodes[0])).toEqual('6;2;7;0;4;8;');
async.done();
});
}));
it('should iterate over an array of objects',
inject([TestBed, AsyncTestCompleter], (tb: TestBed, async) => {
var template = '<ul><li template="ng-for #item of items">{{item["name"]}};</li></ul>';
tb.createView(TestComponent, {html: template})
.then((view) => {
// INIT
view.context.items = [{'name': 'misko'}, {'name': 'shyam'}];
view.detectChanges();
expect(DOM.getText(view.rootNodes[0])).toEqual('misko;shyam;');
// GROW
ListWrapper.push(view.context.items, {'name': 'adam'});
view.detectChanges();
expect(DOM.getText(view.rootNodes[0])).toEqual('misko;shyam;adam;');
// SHRINK
ListWrapper.removeAt(view.context.items, 2);
ListWrapper.removeAt(view.context.items, 0);
view.detectChanges();
expect(DOM.getText(view.rootNodes[0])).toEqual('shyam;');
async.done();
});
}));
it('should gracefully handle nulls',
inject([TestBed, AsyncTestCompleter], (tb: TestBed, async) => {
var template = '<ul><li template="ng-for #item of null">{{item}};</li></ul>';
tb.createView(TestComponent, {html: template})
.then((view) => {
view.detectChanges();
expect(DOM.getText(view.rootNodes[0])).toEqual('');
async.done();
});
}));
it('should gracefully handle ref changing to null and back',
inject([TestBed, AsyncTestCompleter], (tb: TestBed, async) => {
tb.createView(TestComponent, {html: TEMPLATE})
.then((view) => {
view.detectChanges();
expect(DOM.getText(view.rootNodes[0])).toEqual('1;2;');
view.context.items = null;
view.detectChanges();
expect(DOM.getText(view.rootNodes[0])).toEqual('');
view.context.items = [1, 2, 3];
view.detectChanges();
expect(DOM.getText(view.rootNodes[0])).toEqual('1;2;3;');
async.done();
});
}));
it('should throw on ref changing to string',
inject([TestBed, AsyncTestCompleter], (tb: TestBed, async) => {
tb.createView(TestComponent, {html: TEMPLATE})
.then((view) => {
view.detectChanges();
expect(DOM.getText(view.rootNodes[0])).toEqual('1;2;');
view.context.items = 'whaaa';
expect(() => view.detectChanges()).toThrowError();
async.done();
});
}));
it('should works with duplicates',
inject([TestBed, AsyncTestCompleter], (tb: TestBed, async) => {
tb.createView(TestComponent, {html: TEMPLATE})
.then((view) => {
var a = new Foo();
view.context.items = [a, a];
view.detectChanges();
expect(DOM.getText(view.rootNodes[0])).toEqual('foo;foo;');
async.done();
});
}));
it('should repeat over nested arrays',
inject([TestBed, AsyncTestCompleter], (tb: TestBed, async) => {
var template = '<div>' +
'<div template="ng-for #item of items">' +
'<div template="ng-for #subitem of item">' +
'{{subitem}}-{{item.length}};' +
'</div>|' +
'</div>' +
'</div>';
tb.createView(TestComponent, {html: template})
.then((view) => {
view.context.items = [['a', 'b'], ['c']];
view.detectChanges();
view.detectChanges();
view.detectChanges();
expect(DOM.getText(view.rootNodes[0])).toEqual('a-2;b-2;|c-1;|');
view.context.items = [['e'], ['f', 'g']];
view.detectChanges();
expect(DOM.getText(view.rootNodes[0])).toEqual('e-1;|f-2;g-2;|');
async.done();
});
}));
it('should repeat over nested arrays with no intermediate element',
inject([TestBed, AsyncTestCompleter], (tb: TestBed, async) => {
var template = '<div><template [ng-for] #item [ng-for-of]="items">' +
'<div template="ng-for #subitem of item">' +
'{{subitem}}-{{item.length}};' +
'</div></template></div>';
tb.createView(TestComponent, {html: template})
.then((view) => {
view.context.items = [['a', 'b'], ['c']];
view.detectChanges();
expect(DOM.getText(view.rootNodes[0])).toEqual('a-2;b-2;c-1;');
view.context.items = [['e'], ['f', 'g']];
view.detectChanges();
expect(DOM.getText(view.rootNodes[0])).toEqual('e-1;f-2;g-2;');
async.done();
});
}));
it('should display indices correctly',
inject([TestBed, AsyncTestCompleter], (tb: TestBed, async) => {
var template =
'<div><copy-me template="ng-for: var item of items; var i=index">{{i.toString()}}</copy-me></div>';
tb.createView(TestComponent, {html: template})
.then((view) => {
view.context.items = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
view.detectChanges();
expect(DOM.getText(view.rootNodes[0])).toEqual('0123456789');
view.context.items = [1, 2, 6, 7, 4, 3, 5, 8, 9, 0];
view.detectChanges();
expect(DOM.getText(view.rootNodes[0])).toEqual('0123456789');
async.done();
});
}));
});
}
class Foo {
toString() { return 'foo'; }
}
@Component({selector: 'test-cmp'})
@View({directives: [NgFor]})
class TestComponent {
items: any;
constructor() { this.items = [1, 2]; }
}