测试FormArray [英] Testing FormArray

问题描述

我有一个PhoneNumbersFormComponent，其模板如下所示:

I have a PhoneNumbersFormComponent whose template looks like :

<div [formGroup]="form">
    <div formArrayName="numbers">
      <input formControlName="countryPrefix">
      <input formControlName="number">
    </div>
</div>

我想通过angular-cli的ng g component xxx

I want to pass the default test created by angular-cli's ng g component xxx

我遇到的第一个错误是:

The first error I got was:

找不到名称为"countryPrefix"的控件

Cannot find control with name 'countryPrefix'

我用以下方法解决了

  beforeEach(() => {
    fixture = TestBed.createComponent(PhoneNumbersFormComponent);
    component = fixture.componentInstance;
    component.phoneNumbers = [];
    component.form = new FormGroup({
      countryPrefix: new FormControl(),
      number: new FormControl()
    });
    fixture.detectChanges();
  });

现在最后剩下的错误是:

Now the last remaining error is:

找不到名称为数字"的控件

Cannot find control with name 'numbers'

我也不知道如何测试formArrayName="numbers"

推荐答案

尝试如下操作:

let array: FormGroup[] = [];
array.push(new FormGroup({
      countryPrefix: new FormControl(),
      number: new FormControl()
}));
let formArray = new FormArray(array);
component.form = new FormGroup({
       numbers: formArray // or array not totally sure
})

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