angular-docs-cn/packages/core/test/render3/metadata_spec.ts

67 lines
2.2 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 {setClassMetadata} from '../../src/render3/metadata';
import {Type} from '../../src/type';
interface Decorator {
type: any;
args?: any[];
}
interface HasMetadata extends Type<any> {
decorators?: Decorator[];
ctorParameters: {type: any, decorators?: Decorator[]}[];
propDecorators: {[field: string]: Decorator[]};
}
interface CtorParameter {
type: any;
decorators?: Decorator[];
}
function metadataOf(value: Type<any>): HasMetadata {
return value as HasMetadata;
}
describe('render3 setClassMetadata()', () => {
it('should set decorator metadata on a type', () => {
const Foo = metadataOf(class Foo{});
setClassMetadata(Foo, [{type: 'test', args: ['arg']}], null, null);
expect(Foo.decorators).toEqual([{type: 'test', args: ['arg']}]);
});
it('should merge decorator metadata on a type', () => {
const Foo = metadataOf(class Foo{});
Foo.decorators = [{type: 'first'}];
setClassMetadata(Foo, [{type: 'test', args: ['arg']}], null, null);
expect(Foo.decorators).toEqual([{type: 'first'}, {type: 'test', args: ['arg']}]);
});
it('should set ctor parameter metadata on a type', () => {
const Foo = metadataOf(class Foo{});
Foo.ctorParameters = [{type: 'initial'}];
setClassMetadata(Foo, null, [{type: 'test'}], null);
expect(Foo.ctorParameters).toEqual([{type: 'test'}]);
});
it('should set parameter decorator metadata on a type', () => {
const Foo = metadataOf(class Foo{});
setClassMetadata(Foo, null, null, {field: [{type: 'test', args: ['arg']}]});
expect(Foo.propDecorators).toEqual({field: [{type: 'test', args: ['arg']}]});
});
it('should merge parameter decorator metadata on a type', () => {
const Foo = metadataOf(class Foo{});
Foo.propDecorators = {initial: [{type: 'first'}]};
setClassMetadata(Foo, null, null, {field: [{type: 'test', args: ['arg']}]});
expect(Foo.propDecorators)
.toEqual({field: [{type: 'test', args: ['arg']}], initial: [{type: 'first'}]});
});
});