如何编写 angular 测试用例来覆盖 array.find()

Question

我正在尝试为以下方法编写测试用例。我写了类似下面的内容，但它并没有提高/更改代码覆盖率。有人可以帮助我做错什么吗？

组件

remove(item: string, element:any){
    const found =  this.list1.find(el => el.team == element.tirname);
    if(found){
    var index = this.list1.indexOf(found);
    if (index >= 0) {
    this.list1[index].removeFlag = true;
    const index1= this.list1[index].orgsUpdated.indexOf(item);
    if (index1 >= 0) {
      this.list1[index]['orgsUpdated'].splice(index1, 1);
      this.list1[index]['removeFlag'] = false;
      
    }
   
  }
}
const found1 =  this.list2.find(el => el.name == element.name);
if(found1){
var index2 = this.list2.indexOf(found1);
  if (index2 >= 0) {
    const index1= this.list2[index2].gOrgNames.indexOf(item);
    if (index1 >= 0) {
      this.list2[index]['gitOrganizationNames'].splice(index1, 1);
      
    }
   
  }
}

}

规格文件

it('should call remove', () => {
  const spySubscribable = spyOn(component, 'remove');
 let index = 0;
 let item = "org1";
 let element = [{
        "team": 'team1',
        "orgsUpdated": ["org1", "org2"],
        "removeFlag":false
    }];
  component.remove(item,element);
  component.list1[index] = element;
  component.list1[index].removeFlag = true;
  expect(component.list1[index].removeFlag).toBeTruthy;
  expect(spySubscribable).toHaveBeenCalled();
  expect(component.list1[0]).toEqual(element);

});

Answer 1

问题是 spyOn(component, 'remove') 监视该方法以查看它被调用了多少次并删除了它的实现细节。要保留其实现细节，请在 spyOn.

之后添加一个 .and.callThrough()

像这样：

it('should call remove', () => {
  // change this line
  const spySubscribable = spyOn(component, 'remove').and.callThrough();
 let index = 0;
 let item = "org1";
 let element = [{
        "team": 'team1',
        "orgsUpdated": ["org1", "org2"],
        "removeFlag":false
    }];
  // add this log and see what the value is and make sure
  // this.list1.find returns something so it goes inside of the if 
  // block
  console.log('List 1: ', component.list1);
  component.remove(item,element);
  component.list1[index] = element;
  component.list1[index].removeFlag = true;
  expect(component.list1[index].removeFlag).toBeTruthy;
  expect(spySubscribable).toHaveBeenCalled();
  expect(component.list1[0]).toEqual(element);
});

如何编写 angular 测试用例来覆盖 array.find()

How to write angular test case to cover array.find()

jasmine

angular