ca1e538752
This commit introduces the setClassMetadata() private function, which adds metadata to a type in a way that can be accessed via Angular's ReflectionCapabilities. Currently, it writes to static fields as if the metadata being added was downleveled from decorators by tsickle. The plan is for ngtsc to emit code which calls this function, passing metadata on to the runtime for testing purposes. Calls to this function would then be tree-shaken away for production bundles. Testing strategy: proper operation of this function will be an integral part of TestBed metadata overriding. Angular core tests will fail if this is broken. PR Close #26860
67 lines
2.2 KiB
TypeScript
67 lines
2.2 KiB
TypeScript
/**
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* @license
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* Copyright Google Inc. All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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import {setClassMetadata} from '../../src/render3/metadata';
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import {Type} from '../../src/type';
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interface Decorator {
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type: any;
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args?: any[];
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}
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interface HasMetadata extends Type<any> {
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decorators?: Decorator[];
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ctorParameters: {type: any, decorators?: Decorator[]}[];
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propDecorators: {[field: string]: Decorator[]};
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}
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interface CtorParameter {
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type: any;
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decorators?: Decorator[];
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}
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function metadataOf(value: Type<any>): HasMetadata {
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return value as HasMetadata;
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}
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describe('render3 setClassMetadata()', () => {
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it('should set decorator metadata on a type', () => {
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const Foo = metadataOf(class Foo{});
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setClassMetadata(Foo, [{type: 'test', args: ['arg']}], null, null);
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expect(Foo.decorators).toEqual([{type: 'test', args: ['arg']}]);
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});
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it('should merge decorator metadata on a type', () => {
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const Foo = metadataOf(class Foo{});
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Foo.decorators = [{type: 'first'}];
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setClassMetadata(Foo, [{type: 'test', args: ['arg']}], null, null);
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expect(Foo.decorators).toEqual([{type: 'first'}, {type: 'test', args: ['arg']}]);
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});
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it('should set ctor parameter metadata on a type', () => {
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const Foo = metadataOf(class Foo{});
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Foo.ctorParameters = [{type: 'initial'}];
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setClassMetadata(Foo, null, [{type: 'test'}], null);
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expect(Foo.ctorParameters).toEqual([{type: 'test'}]);
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});
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it('should set parameter decorator metadata on a type', () => {
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const Foo = metadataOf(class Foo{});
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setClassMetadata(Foo, null, null, {field: [{type: 'test', args: ['arg']}]});
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expect(Foo.propDecorators).toEqual({field: [{type: 'test', args: ['arg']}]});
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});
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it('should merge parameter decorator metadata on a type', () => {
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const Foo = metadataOf(class Foo{});
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Foo.propDecorators = {initial: [{type: 'first'}]};
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setClassMetadata(Foo, null, null, {field: [{type: 'test', args: ['arg']}]});
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expect(Foo.propDecorators)
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.toEqual({field: [{type: 'test', args: ['arg']}], initial: [{type: 'first'}]});
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});
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});
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