小编vie*_*ogs的帖子

When I checked the slide toggle it should work as expected. But when I try to uncheck it there is a confirmation window asking if you are sure. When I click cancel in that confirmation window, still the toggle changes to unchecked, which shouldn't happen. It should stay in the same state.

Here is my Html and TS Code

// html
<mat-slide-toggle 
   (change)="change($event)" [checked]="isChecked()" >
     To-pay
   </mat-slide-toggle>

TS code:

// ts
    change(e) {
       if(this.checked) {
           if(confirm("Are you sure")) {
              console.log("toggle") …

我第一次尝试 Angular 5 单元测试。虽然我已经创建了应用程序然后决定在其中运行测试。但我收到这些错误：

AppComponent should create the app
AppComponent should have as title 'app'
AppComponent should render title in a h1 tag
GalleryComponent should create
UploadComponent should create

和错误详细信息，如：

Failed: Template parse errors:
'app-upload' is not a known element:
1. If 'app-upload' is an Angular component, then verify that it is part of this module.
2. If 'app-upload' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas' of this component to suppress this message. (" class="row">
        <div class="col-md-3" …