Angular单元测试表单验证-控件保持不变

import { ComponentFixture, TestBed } from '@angular/core/testing';
import { FormsModule } from '@angular/forms';

import { MyComponent } from './my.component';

describe('MyComponent', () => {
  let component: MyComponent;
  let fixture: ComponentFixture<MyComponent>;

  beforeEach(async () => {
    await TestBed.configureTestingModule({
      imports: [FormsModule],
      declarations: [MyComponent]
    })
    .compileComponents();
  });

  beforeEach(() => {
    fixture = TestBed.createComponent(MyComponent);
    component = fixture.componentInstance;
    fixture.detectChanges();
  });

  it('should keep control value unchanged', () => {
    const control = component.myForm.controls['myControl'];
    const originalValue = control.value;

    // Mark the control as untouched
    control.markAsUntouched();

    // Perform validation or other operations

    // Assert that the control value is unchanged
    expect(control.value).toBe(originalValue);
  });
});