Typescript 中的单元测试，使用 Inversify 和 mocha 和 chai 进行依赖注入

Question

我使用 mocha 和 chai 使用 inversify 和单元测试创建了 typescript 项目。

@injectable()
export class SomeClass{

// Used in Constructor injection
readonly object1:TypeObjectClass; 

// Property Injection 
(@inject(TYPE2)
readonly someObject1:TypeSomeObjectClass1; 

constructor(@inject(TYPE) object1: TypeObjectClass) {

this.object1=object1

}

public someMethod(){

this.object1.DoSomething();
this.someObject1.DoAnything();

}
}

我为上面的class写了一个单元测试

单元测试

let chaiAsPromised = require('chai-as-promised');
chai.use(chaiAsPromised);
let expect = chai.expect;

describe('Test Interaction Controller APIs', () => {

 let object1: IMock<TypeObjectClass>;
 let someObject: IMock<TypeSomeObjectClass1>;
let someClass: SomeClass;

beforeEach(()=>{
//Mock objects
 object1= Mock.ofType<object1>();
 someObject= Mock.ofType<TypeSomeObjectClass1>();
// Constructor injected. 
SomeClass=new SomeClass(object1.object)

})

}

由于这是属性注入，如何在单元测试中注入someObject1 ？

Answer 1

您可以创建容器的快照并将任何值重新绑定到您的模拟。

import container from "path_to_your_container";

describe("Intent Logic Handler Test", () => {

  beforeEach(() => {
    container.snapshot();
  });

  afterEach(() => {
    container.restore();
  });

  test("Your test", () => {

    // Arrange

    const mock= TypeMoq.Mock.ofType<IFoo>();
    container.rebind("Object").toConstantValue(mock.object);

    const sut = new Foo();

    // Assert
    assert.throws(() => {
      sut.handle(turn);
    }, Error, "Name cannot be undefined.");
  });

更多信息可以在这里找到。