First version of Uncivbot, which deals with translation merging

When commenting "merge translations" in a PR, it:
- Creates a new 'translations' branch if it doesn't exist
- Creates a PR for the 'translations' branch if it doesn't exist
- Changes the PR's base to 'translations'
- Merges the PR, if it's mergable

uncivbot/test/index.test.js

@@ -0,0 +1,58 @@
+const nock = require('nock')
+// Requiring our app implementation
+const myProbotApp = require('..')
+const { Probot } = require('probot')
+// Requiring our fixtures
+const payload = require('./fixtures/issues.opened')
+const issueCreatedBody = { body: 'Thanks for opening this issue!' }
+const fs = require('fs')
+const path = require('path')
+
+describe('My Probot app', () => {
+  let probot
+  let mockCert
+
+  beforeAll((done) => {
+    fs.readFile(path.join(__dirname, 'fixtures/mock-cert.pem'), (err, cert) => {
+      if (err) return done(err)
+      mockCert = cert
+      done()
+    })
+  })
+
+  beforeEach(() => {
+    nock.disableNetConnect()
+    probot = new Probot({ id: 123, cert: mockCert })
+    // Load our app into probot
+    probot.load(myProbotApp)
+  })
+
+  test('creates a comment when an issue is opened', async () => {
+    // Test that we correctly return a test token
+    nock('https://api.github.com')
+      .post('/app/installations/2/access_tokens')
+      .reply(200, { token: 'test' })
+
+    // Test that a comment is posted
+    nock('https://api.github.com')
+      .post('/repos/hiimbex/testing-things/issues/1/comments', (body) => {
+        expect(body).toMatchObject(issueCreatedBody)
+        return true
+      })
+      .reply(200)
+
+    // Receive a webhook event
+    await probot.receive({ name: 'issues', payload })
+  })
+
+  afterEach(() => {
+    nock.cleanAll()
+    nock.enableNetConnect()
+  })
+})
+
+// For more information about testing with Jest see:
+// https://facebook.github.io/jest/
+
+// For more information about testing with Nock see:
+// https://github.com/nock/nock