migrate to jest

package.json

@@ -4,7 +4,7 @@
   "description": "A Probot extension that adds slash commands to GitHub",
   "main": "index.js",
   "scripts": {
-    "test": "mocha && standard"
+    "test": "jest"
   },
   "repository": {
     "type": "git",
@@ -14,13 +14,12 @@
   "license": "ISC",
   "homepage": "https://github.com/probot/commands",
   "devDependencies": {
-    "expect": "^1.20.2",
-    "mocha": "^3.4.1",
+    "jest": "^21.2.1",
     "standard": "^10.0.2"
   },
   "standard": {
     "env": [
-      "mocha"
+      "jest"
     ]
   }
 }

test/index.js

@@ -1,5 +1,4 @@
 const {EventEmitter} = require('events')
-const expect = require('expect')
 const commands = require('..')
 
 describe('commands', () => {
@@ -11,7 +10,7 @@ describe('commands', () => {
   }
 
   beforeEach(() => {
-    callback = expect.createSpy()
+    callback = jest.fn()
     robot = new EventEmitter()
     commands(robot, 'foo', callback)
   })
@@ -32,7 +31,7 @@ describe('commands', () => {
 
   it('does not call callback for other commands', () => {
     robot.emit('issue_comment.created', payload('hello world\n\n/nope nothing to see'))
-    expect(callback).toNotHaveBeenCalled()
+    expect(callback).not.toHaveBeenCalled()
   })
 
   it('invokes command on issue edit', () => {
@@ -41,6 +40,6 @@ describe('commands', () => {
     robot.emit('issue_comment.updated', event)
     robot.emit('issue_comment.deleted', event)
 
-    expect(callback).toNotHaveBeenCalled()
+    expect(callback).not.toHaveBeenCalled()
   })
 })