81 lines
2.7 KiB
TypeScript
81 lines
2.7 KiB
TypeScript
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/**
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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 * as ts from 'typescript';
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import {ReferenceEmitter} from '../../imports';
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import {PartialEvaluator} from '../../partial_evaluator';
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import {TypeScriptReflectionHost} from '../../reflection';
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import {getDeclaration, makeProgram} from '../../testing/in_memory_typescript';
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import {DirectiveDecoratorHandler} from '../src/directive';
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import {SelectorScopeRegistry} from '../src/selector_scope';
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describe('DirectiveDecoratorHandler', () => {
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it('should use the `ReflectionHost` to detect class inheritance', () => {
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const {program, options, host} = makeProgram([
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{
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name: 'node_modules/@angular/core/index.d.ts',
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contents: 'export const Directive: any;',
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},
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{
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name: 'entry.ts',
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contents: `
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import {Directive} from '@angular/core';
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@Directive({selector: 'test-dir-1'})
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export class TestDir1 {}
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@Directive({selector: 'test-dir-2'})
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export class TestDir2 {}
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`,
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},
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]);
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const checker = program.getTypeChecker();
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const reflectionHost = new TestReflectionHost(checker);
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const evaluator = new PartialEvaluator(reflectionHost, checker);
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const handler = new DirectiveDecoratorHandler(
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reflectionHost, evaluator,
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new SelectorScopeRegistry(checker, reflectionHost, new ReferenceEmitter([])), false);
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const analyzeDirective = (dirName: string) => {
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const DirNode = getDeclaration(program, 'entry.ts', dirName, ts.isClassDeclaration);
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const detected = handler.detect(DirNode, reflectionHost.getDecoratorsOfDeclaration(DirNode));
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if (detected === undefined) {
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throw new Error(`Failed to recognize @Directive (${dirName}).`);
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}
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const {analysis} = handler.analyze(DirNode, detected.metadata);
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if (analysis === undefined) {
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throw new Error(`Failed to analyze @Directive (${dirName}).`);
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}
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return analysis;
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};
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// By default, `TestReflectionHost#hasBaseClass()` returns `false`.
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const analysis1 = analyzeDirective('TestDir1');
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expect(analysis1.meta.usesInheritance).toBe(false);
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// Tweak `TestReflectionHost#hasBaseClass()` to return true.
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reflectionHost.hasBaseClassReturnValue = true;
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const analysis2 = analyzeDirective('TestDir2');
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expect(analysis2.meta.usesInheritance).toBe(true);
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});
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});
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// Helpers
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class TestReflectionHost extends TypeScriptReflectionHost {
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hasBaseClassReturnValue = false;
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hasBaseClass(node: ts.Declaration): boolean { return this.hasBaseClassReturnValue; }
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}
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