angular-docs-cn/packages/compiler/test/render3/view/i18n_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 * as o from '../../../src/output/output_ast';
import {I18nContext} from '../../../src/render3/view/i18n';
describe('I18nContext', () => {
it('should support i18n content collection', () => {
const ctx = new I18nContext(5, null, 'myRef');
// basic checks
expect(ctx.isRoot()).toBe(true);
expect(ctx.isResolved()).toBe(true);
expect(ctx.getId()).toBe(0);
expect(ctx.getIndex()).toBe(5);
expect(ctx.getTemplateIndex()).toBeNull();
expect(ctx.getRef()).toBe('myRef');
// data collection checks
expect(ctx.getContent()).toBe('');
ctx.appendText('Foo');
ctx.appendElement(1);
ctx.appendText('Bar');
ctx.appendElement(1, true);
expect(ctx.getContent()).toBe('Foo<6F>#1<>Bar<61>/#1<>');
// binding collection checks
expect(ctx.getBindings().size).toBe(0);
ctx.appendBinding(o.literal(1));
ctx.appendBinding(o.literal(2));
expect(ctx.getBindings().size).toBe(2);
});
it('should support nested contexts', () => {
const ctx = new I18nContext(5, null, 'myRef');
const templateIndex = 1;
// set some data for root ctx
ctx.appendText('Foo');
ctx.appendBinding(o.literal(1));
ctx.appendTemplate(templateIndex);
expect(ctx.isResolved()).toBe(false);
// create child context
const childCtx = ctx.forkChildContext(6, templateIndex);
expect(childCtx.getContent()).toBe('');
expect(childCtx.getBindings().size).toBe(0);
expect(childCtx.getRef()).toBe(ctx.getRef()); // ref should be passed into child ctx
expect(childCtx.isRoot()).toBe(false);
childCtx.appendText('Bar');
childCtx.appendElement(2);
childCtx.appendText('Baz');
childCtx.appendElement(2, true);
childCtx.appendBinding(o.literal(2));
childCtx.appendBinding(o.literal(3));
expect(childCtx.getContent()).toBe('Bar<61>#2:1<>Baz<61>/#2:1<>');
expect(childCtx.getBindings().size).toBe(2);
// reconcile
ctx.reconcileChildContext(childCtx);
expect(ctx.getContent()).toBe('Foo<6F>*1:1<>Bar<61>#2:1<>Baz<61>/#2:1<><31>/*1:1<>');
});
});