Trying to spy and override a function two levels down using Jest.
The test results say, "Expected mock function to have been called, but it was not called."
// mail/index.unit.test.js
import mail from './index';
import * as sib from '../sendinblue';
describe('EMAIL Util', () =>
test('should call sibSubmit in server/utils/sendinblue/index.js', async() => {
const sibMock = jest.spyOn(sib, 'sibSubmit');
sibMock.mockImplementation(() => 'Calling sibSubmit()');
const testMessage = {
sender: [{ email: '[email protected]', name: 'Something' }],
to: [{ email: '[email protected]', name: 'Something' }],
subject: 'My Subject',
htmlContent: 'This is test content'
};
await mail.send(testMessage);
expect(sibMock).toHaveBeenCalled();
})
);
mail.send() comes from here...
// mail/index.js
import { sibSendTransactionalEmail } from '../sendinblue';
export default {
send: async message => {
try {
return await sibSendTransactionalEmail(message);
} catch(err) {
console.error(err);
}
}
};
Which uses SendInBlue's API via axios (why I need to mock)...
// sendinblue/index.js
import axios from 'axios';
import config from '../../config/environment';
export async function sibSubmit(method, url, data) {
let instance = axios.create({
baseURL: 'https://api.sendinblue.com',
headers: { 'api-key': config.mail.apiKey }
});
try {
const response = await instance({
method,
url,
data
});
return response;
} catch(err) {
console.error('Error communicating with SendInBlue', instance, err);
}
}
export const sibSendTransactionalEmail = message => sibSubmit('POST', '/v3/smtp/email', message);
I assumed mail.send() would call sibSendTransactionalEmail() in the other module and it would call sibSubmit(), the focus of jest.spyOn(). Wondering where I went wrong.