fix(hubot): hubot --help wasn't working (#1693)

Author: joeyguerra

bin/hubot.js

@@ -33,7 +33,7 @@ const options = {
 }
 
 const Parser = new OptParse(switches)
-Parser.banner = 'Usage hubot [options]'
+Parser.banner = 'Usage: hubot [options]'
 
 Parser.on('adapter', (opt, value) => {
   options.adapter = value

src/OptParse.js

@@ -34,6 +34,11 @@ class OptParse extends EventEmitter {
     }
     return options
   }
+
+  toString () {
+    return `${this.banner}
+${this.switches.map(([key, description]) => `  ${key}, ${description}`).join('\n')}`
+  }
 }
 
 module.exports = OptParse

test/hubot_test.js

@@ -9,7 +9,7 @@ const { TextMessage, User } = require('../index.js')
 const path = require('node:path')
 
 describe('Running bin/hubot.js', () => {
-  it('should load adapter from HUBOT_FILE environment variable', async function () {
+  it('should load adapter from HUBOT_FILE environment variable', async () => {
     process.env.HUBOT_HTTPD = 'false'
     process.env.HUBOT_FILE = path.resolve(root, 'test', 'fixtures', 'MockAdapter.mjs')
     const hubot = require('../bin/hubot.js')
@@ -31,4 +31,32 @@ describe('Running bin/hubot.js', () => {
       hubot.shutdown()
     }
   })
+  const { spawn } = require('child_process')
+
+  it('should output a help message when run with --help', (t, done) => {
+    const hubot = spawn('./bin/hubot', ['--help'])
+    const expected = `Usage: hubot [options]
+  -a, --adapter HUBOT_ADAPTER
+  -f, --file HUBOT_FILE
+  -c, --create HUBOT_CREATE
+  -d, --disable-httpd HUBOT_HTTPD
+  -h, --help
+  -l, --alias HUBOT_ALIAS
+  -n, --name HUBOT_NAME
+  -r, --require PATH
+  -t, --config-check
+  -v, --version
+`
+    let actual = ''
+    hubot.stdout.on('data', (data) => {
+      actual += data.toString()
+    })
+    hubot.stderr.on('data', (data) => {
+      actual += data.toString()
+    })
+    hubot.on('close', (code) => {
+      assert.deepEqual(actual, expected)
+      done()
+    })
+  })
 })