day five - a unit test

backend/src/controllers/OngController.js

@@ -1,4 +1,4 @@
-const crypto = require('crypto')
+const generateUniqueId = require('../utils/generateUniqueId')
 const connection  = require('../database/connection')
 
 module.exports = {
@@ -11,7 +11,7 @@ module.exports = {
   async create(request, response) {
     const { name, email, whatsapp, city, uf } = request.body
 
-    const id = crypto.randomBytes(4).toString('HEX')
+    const id = generateUniqueId()
 
     await connection('ongs').insert({
       id,
@@ -24,4 +24,4 @@ module.exports = {
 
     return response.json({ id })
   }
-}
+}

backend/src/utils/generateUniqueId.js

@@ -0,0 +1,5 @@
+const crypto = require('crypto')
+
+module.exports = function generateUniqueId() {
+  return crypto.randomBytes(4).toString('HEX')
+}

backend/tests/unit/generateUniqueId.spec.js

@@ -0,0 +1,9 @@
+const generateUniqueId = require('../../src/utils/generateUniqueId')
+
+describe('Generate Unique ID', () => {
+  it('should generate an unique ID', () => {
+    const id = generateUniqueId()
+
+    expect(id).toHaveLength(8)
+  })
+})