feat: Test Send Email

backend/src/util/sendEMail.test.ts

@@ -0,0 +1,85 @@
+import { sendEMail } from './sendEMail'
+import { createTransport } from 'nodemailer'
+import CONFIG from '../config'
+
+CONFIG.EMAIL = false
+CONFIG.EMAIL_SMTP_URL = 'EMAIL_SMTP_URL'
+CONFIG.EMAIL_SMTP_PORT = '1234'
+CONFIG.EMAIL_USERNAME = 'user'
+CONFIG.EMAIL_PASSWORD = 'pwd'
+
+jest.mock('nodemailer', () => {
+  return {
+    __esModule: true,
+    createTransport: jest.fn(() => {
+      return {
+        sendMail: jest.fn(() => {
+          return {
+            messageId: 'message',
+          }
+        }),
+      }
+    }),
+  }
+})
+
+describe('sendEMail', () => {
+  let result: boolean
+  describe('config email is false', () => {
+    // eslint-disable-next-line no-console
+    const consoleLog = console.log
+    const consoleLogMock = jest.fn()
+    // eslint-disable-next-line no-console
+    console.log = consoleLogMock
+    beforeEach(async () => {
+      result = await sendEMail({
+        from: 'sender@mail.org',
+        to: 'receiver@mail.org',
+        subject: 'Subject',
+        text: 'Text text text',
+      })
+    })
+
+    afterAll(() => {
+      // eslint-disable-next-line no-console
+      console.log = consoleLog
+    })
+
+    it('logs warining to console', () => {
+      expect(consoleLogMock).toBeCalledWith('Emails are disabled via config')
+    })
+
+    it('returns false', () => {
+      expect(result).toBeFalsy()
+    })
+  })
+
+  describe('config email is true', () => {
+    beforeEach(async () => {
+      CONFIG.EMAIL = true
+      result = await sendEMail({
+        from: 'sender@mail.org',
+        to: 'receiver@mail.org',
+        subject: 'Subject',
+        text: 'Text text text',
+      })
+    })
+
+    it('calls the transporter', () => {
+      expect(createTransport).toBeCalledWith({
+        host: 'EMAIL_SMTP_URL',
+        port: 1234,
+        secure: false,
+        requireTLS: true,
+        auth: {
+          user: 'user',
+          pass: 'pwd',
+        },
+      })
+    })
+
+    it('returns true', () => {
+      expect(result).toBeTruthy()
+    })
+  })
+})