Unit testing 如何在It块内部使用模拟代码

我试着在根级别上开玩笑，它工作得很好。但内部It块中使用的jest mock无法解决此问题

型号

    email = (to: string, key: string) => {
        const emailParam = {
            from: 'yzx@gmail.com',
            to: to,
            subject: 'Hai',
            html: `<p>hello.</p>`
        };
        return Mailgun.sendEmail(emailParam);
    };

                jest.mock('mailgun-js', () => {
                    const mockMailgun = {
                        messages: jest.fn().mockReturnThis(),
                        send: jest.fn(() => ({
                            id: '1',
                            message: 'Email send successfully.',
                        })),
                    };
                    return jest.fn(() => mockMailgun);
                });    

    describe('Email', () => {
        it('', async () => {
            const to = 'xyz@gmail.com'  
            const key = 1234
            // Executing
            const result = model.email(to, key);
            // Verifying
            expect(result.message).toBe('Email send successfully.');
            expect(mailgun.messages().send).toHaveBeenCalledWith(emailParams);
        });
    });

    describe('Email', () => {
        it('', async () => {

          jest.mock('mailgun-js', () => {
               const mockMailgun = {
               messages: jest.fn().mockReturnThis(),
               send: jest.fn(() => ({
                        id: '1',
                        message: 'Email send successfully.',
               })),
             };
             return jest.fn(() => mockMailgun);
          }); 

            const to = 'xyz@gmail.com'  
            const key = 1234
            // Executing
            const result = model.email(to, key);
            // Verifying
            expect(result.message).toBe('Email send successfully.');
            expect(mailgun.messages().send).toHaveBeenCalledWith(emailParams);
        });
    });

错误案例

    email = (to: string, key: string) => {
        const emailParam = {
            from: 'yzx@gmail.com',
            to: to,
            subject: 'Hai',
            html: `<p>hello.</p>`
        };
        return Mailgun.sendEmail(emailParam);
    };

                jest.mock('mailgun-js', () => {
                    const mockMailgun = {
                        messages: jest.fn().mockReturnThis(),
                        send: jest.fn(() => ({
                            id: '1',
                            message: 'Email send successfully.',
                        })),
                    };
                    return jest.fn(() => mockMailgun);
                });    

    describe('Email', () => {
        it('', async () => {
            const to = 'xyz@gmail.com'  
            const key = 1234
            // Executing
            const result = model.email(to, key);
            // Verifying
            expect(result.message).toBe('Email send successfully.');
            expect(mailgun.messages().send).toHaveBeenCalledWith(emailParams);
        });
    });

    describe('Email', () => {
        it('', async () => {

          jest.mock('mailgun-js', () => {
               const mockMailgun = {
               messages: jest.fn().mockReturnThis(),
               send: jest.fn(() => ({
                        id: '1',
                        message: 'Email send successfully.',
               })),
             };
             return jest.fn(() => mockMailgun);
          }); 

            const to = 'xyz@gmail.com'  
            const key = 1234
            // Executing
            const result = model.email(to, key);
            // Verifying
            expect(result.message).toBe('Email send successfully.');
            expect(mailgun.messages().send).toHaveBeenCalledWith(emailParams);
        });
    });

---

我试图在It区内开玩笑。这不起作用。如何在It块内使用jest mock函数。

您不应该在

It

内模拟依赖项。通常的方法是在每次之前的

方法中提供模拟，并最终在每次

之后使用

重置模拟

您可以在此处找到其他信息：