在Angular Jasmine测试中为具有不同泛型类型的同一类使用两个提供程序

import { TestBed } from '@angular/core/testing';

// 定义一个泛型类
class GenericClass<T> {
  constructor(private value: T) {}

  getValue(): T {
    return this.value;
  }
}

describe('GenericClass', () => {
  let provider1: GenericClass<number>;
  let provider2: GenericClass<string>;

  beforeEach(() => {
    TestBed.configureTestingModule({
      providers: [
        { provide: GenericClass, useValue: new GenericClass<number>(10) },
        { provide: GenericClass, useValue: new GenericClass<string>('Hello') }
      ]
    });

    provider1 = TestBed.inject(GenericClass); // 获取处理number类型的提供程序实例
    provider2 = TestBed.inject(GenericClass); // 获取处理string类型的提供程序实例
  });

  it('should return the correct value for number type', () => {
    expect(provider1.getValue()).toBe(10);
  });

  it('should return the correct value for string type', () => {
    expect(provider2.getValue()).toBe('Hello');
  });
});