Moleculer -如何在玩笑中模拟方法？

Question

为了模拟使用Jest，我们通常使用jest.spyOn。但是如何在Moleculer服务中模拟method呢？

Answer 1

只需在您的测试用例中创建的服务之后覆盖它。示例：

describe("Test MyService", () => {
    const broker = new ServiceBroker({ logger: false });
    const service = broker.createService(MyService);

    // Mock my method in service instance
    service.myMethod = jest.fn();

    it("should call myMethod", () => {
        service.doSomething();
        expect(service.myMethod).toHaveBeenCalledTimes(1);
    });
});