Add test coverage for CopyUsers class

.codeclimate.yml

@@ -2,6 +2,7 @@ version: "2"
 
 exclude_patterns:
   - "__tests__/"
+  - "__mocks__/"
   - 'eslintrc.js'
   - 'jest.config.js'
   - '**/node_modules/'

.dockerignore

@@ -3,6 +3,7 @@
 .git
 .node-version
 Dockerfile
+__mocks__
 __tests__
 node_modules
 npm-debug.log

__mocks__/s3-error-fake.js

@@ -0,0 +1,5 @@
+export default class S3ErrorFake {
+  putObject(_, callback) {
+    callback('uh oh')
+  }
+}

__mocks__/s3-success-fake.js

@@ -0,0 +1,5 @@
+export default class S3SuccessFake {
+  putObject(_, callback) {
+    callback()
+  }
+}

__tests__/CopyUsers.test.js

@@ -1,5 +1,66 @@
+import AWS from 'aws-sdk'
+import CopyUsers from '../src/CopyUsers'
+import S3ErrorFake from '../__mocks__/s3-error-fake'
+import S3SuccessFake from '../__mocks__/s3-success-fake'
+
 describe('CopyUsers', () => {
-  test('dummy test', () => {
-    expect(true).toEqual(true)
+  const userList = [
+    { Username: 'user1' },
+    { Username: 'user2' },
+  ]
+  const copier = new CopyUsers(userList)
+
+  describe('constructor()', () => {
+    it('sets userListString', () => {
+      expect(copier.userListString).toEqual("[{\"Username\":\"user1\"},{\"Username\":\"user2\"}]")
+    })
+    it('sets s3', () => {
+      expect(copier.s3).toBeInstanceOf(AWS.S3)
+    })
+    it('sets objectKey', () => {
+      // Matches: {ISO DATE}/{AWS_REGION}_{USER_POOL_ID}.json
+      expect(copier.objectKey).toMatch(/\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\.\d+Z\/my-region-1_uSeRPoOlId\.json/)
+    })
+  })
+
+  describe('copy()', () => {
+    const logSpy = jest.spyOn(console, 'log')
+    const errorSpy = jest.spyOn(console, 'error')
+
+    describe('when successful', () => {
+      beforeAll(() => {
+        copier.s3 = new S3SuccessFake()
+      })
+
+      it('calls putObject() on this.s3 and logs a non-error message', () => {
+        const s3Spy = jest.spyOn(copier.s3, 'putObject')
+        copier.copy()
+        expect(s3Spy).toHaveBeenCalledWith({
+          Body: "[{\"Username\":\"user1\"},{\"Username\":\"user2\"}]",
+          Bucket: 'my-bucket-name',
+          Key: expect.any(String)
+        }, expect.any(Function))
+        expect(logSpy).toHaveBeenCalledWith('Users backed up to S3')
+        expect(errorSpy).not.toHaveBeenCalled()
+      })
+    })
+
+    describe('when it errors out', () => {
+      beforeAll(() => {
+        copier.s3 = new S3ErrorFake()
+      })
+
+      it('calls putObject() on this.s3 and logs an error', () => {
+        const s3Spy = jest.spyOn(copier.s3, 'putObject')
+        copier.copy()
+        expect(s3Spy).toHaveBeenCalledWith({
+          Body: "[{\"Username\":\"user1\"},{\"Username\":\"user2\"}]",
+          Bucket: 'my-bucket-name',
+          Key: expect.any(String)
+        }, expect.any(Function))
+        expect(logSpy).not.toHaveBeenCalled()
+        expect(errorSpy).toHaveBeenCalledWith('error copying backup to S3: uh oh')
+      })
+    })
   })
 })

config/test.js

@@ -3,5 +3,5 @@ module.exports = {
   awsAccessSecret: 'secret',
   awsRegion: 'my-region-1',
   s3Bucket: 'my-bucket-name',
-  userPoolId: 'my-region_1_uSeRPoOlId'
+  userPoolId: 'my-region-1_uSeRPoOlId'
 }