有没有办法修复此错误而无需在文件中放置忽略?
运行命令时出错:
./node_modules/tslint/bin/tslint -p src/tsconfig.json --type-check src/app/app.component.spec.ts
[21, 5]: unused expression, expected an assignment or function call
测试:
let chai = require('chai');
let expect = chai.expect;
import { AppComponent } from './app.component';
import { ComponentFixture, TestBed } from '@angular/core/testing';
describe('AppComponent', function() {
let testAppComponent: AppComponent;
let fixture: ComponentFixture<AppComponent>;
beforeEach(() => {
TestBed.configureTestingModule({
declarations: [AppComponent]
});
fixture = TestBed.createComponent(AppComponent);
testAppComponent = fixture.componentInstance;
});
it('should create the correct component', () => {
expect(testAppComponent instanceof AppComponent).to.be.true;
});
});
答案 0 :(得分:2)
您是否意味着这个:
expect(testAppComponent instanceof AppComponent).toBe(true);
你所拥有的表达式只是访问了一堆属性,你需要某种函数调用来实际执行任何操作。