[英]'unused expression, expected an assignment or function call' in an angular unit test when running tslint
Is there a way to fix this error without having to place an ignore in the file?有没有办法解决这个错误而不必在文件中放置一个忽略?
Error when running command: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
Test: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;
});
});
Did you perhaps mean this:你也许是这个意思:
expect(testAppComponent instanceof AppComponent).toBe(true);
The expression you have there just accesses a bunch of properties, you need some kind of function call for it to actually do anything.你在那里的表达式只是访问一堆属性,你需要某种函数调用才能让它真正做任何事情。
In my case I had a dangling ?
就我而言,我有一个悬空?
someArray.find(someCheck)?.items.push(someThing)
I just wrote it out as an if
statement:我只是把它写成一个if
语句:
let ok = someArray.find(someCheck);
if (ok) {
ok.items.push(someThing);
}
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.