Question

我有一个简单的组件，可以将粘贴事件处理为表单输入。

表格：

float

现在我正在尝试测试它，它看起来像这样：

this.searchForm = this.formBuilder.group({
  query: [ null, [Validators.required] ]
});

onPaste(event) {
    event.preventDefault();
    const formattedQuery = event.clipboardData.getData('text/plain')
      .split(/,?[\r\n\t]+\s?/)
      .join(', ')
      .replace(/,\s?$/g, '');

    this.searchForm.get('query').setValue(formattedQuery);
  }

但结果我得到了

it('should reformat pasted data', () => {
    const queryField = fixture.debugElement.query(By.css('input[type="search"]'));
    queryField.nativeElement.dispatchEvent(new ClipboardEvent('paste', {
      dataType: 'text/plain', 
      data: '123\r123'
    }));
    fixture.detectChanges();
    expect(queryField.nativeElement.value).toBe('123, 123');
    // also tried expect(component.searchForm.get('query').value).toBe('123, 123');
  });

如果我Expected '' to be '123, 123'它显示输入，但为什么它不处理console.log(queryField.nativeElement)事件？

new ClipboardEvent('paste')

您可以在此处找到完整的组件https://stackblitz.com/edit/angular-cp9yhx?file=app%2Fhello.component.ts

我的单元测试出了什么问题？

Answer 1

试试这个：

it('should reformat pasted data', () => {
  component.onPaste(new ClipboardEvent('paste', {
    dataType: 'text/plain', 
    data: '123\r123'
  }));
  expect(queryField.nativeElement.value).toBe('123, 123');
});

甚至

it('should reformat pasted data', () => {
  component.onPaste(new ClipboardEvent('paste', {
    dataType: 'text/plain', 
    data: '123\r123'
  }));
  expect(component.searchForm.get('query').value).toBe('123, 123');
});

Answer 2

这对我有用：

it('should trim pasted data', () => {
  const initialValue = 'test ';
  fixture.detectChanges();

  // Setting initial value
  const el = inputElement.nativeElement;
  el.value = initialValue;

  // Setting up event data
  const pasteData = new DataTransfer();
  pasteData.setData('text', initialValue);

  // Creating event
  const pasteEvent = new ClipboardEvent('paste', {
    clipboardData: pasteData
  } as any);


  // Dispatching event    
  el.dispatchEvent(pasteEvent);

  expect(el.value).toEqual('test');
});

业力测试粘贴事件

2 个答案: