Return a promise in test runners

spec/jasmine-test-runner.coffee

@@ -22,8 +22,10 @@ module.exports = ({logFile, headless, testPaths, buildAtomEnvironment}) ->
 
   setSpecType('user')
 
+  resolveWithExitCode = null
+  promise = new Promise (resolve, reject) -> resolveWithExitCode = resolve
   jasmineEnv = jasmine.getEnv()
-  jasmineEnv.addReporter(buildReporter({logFile, headless}))
+  jasmineEnv.addReporter(buildReporter({logFile, headless, resolveWithExitCode}))
   TimeReporter = require './time-reporter'
   jasmineEnv.addReporter(new TimeReporter())
   jasmineEnv.setIncludedTags([process.platform])
@@ -37,6 +39,7 @@ module.exports = ({logFile, headless, testPaths, buildAtomEnvironment}) ->
   atom.commands.attach(window)
 
   jasmineEnv.execute()
+  promise
 
 disableFocusMethods = ->
   ['fdescribe', 'ffdescribe', 'fffdescribe', 'fit', 'ffit', 'fffit'].forEach (methodName) ->
@@ -68,14 +71,14 @@ setSpecType = (specType) ->
 setSpecDirectory = (specDirectory) ->
   setSpecField('specDirectory', specDirectory)
 
-buildReporter = ({logFile, headless}) ->
+buildReporter = ({logFile, headless, resolveWithExitCode}) ->
   if headless
-    buildTerminalReporter(logFile)
+    buildTerminalReporter(logFile, resolveWithExitCode)
   else
     AtomReporter = require './atom-reporter'
     reporter = new AtomReporter()
 
-buildTerminalReporter = (logFile) ->
+buildTerminalReporter = (logFile, resolveWithExitCode) ->
   logStream = fs.openSync(logFile, 'w') if logFile?
   log = (str) ->
     if logStream?
@@ -94,9 +97,10 @@ buildTerminalReporter = (logFile) ->
 
         if grim.getDeprecationsLength() > 0
           grim.logDeprecations()
-          return atom.exit(1)
+          resolveWithExitCode(1)
+          return
 
       if runner.results().failedCount > 0
-        atom.exit(1)
+        resolveWithExitCode(1)
       else
-        atom.exit(0)
+        resolveWithExitCode(0)

src/initialize-test-window.coffee

@@ -1,10 +1,14 @@
 # Start the crash reporter before anything else.
 require('crash-reporter').start(productName: 'Atom', companyName: 'GitHub')
+remote = require 'remote'
+
+exitWithStatusCode = (status) =>
+  remote.require('app').emit('will-exit')
+  remote.process.exit(status)
 
 try
   path = require 'path'
   ipc = require 'ipc'
-  remote = require 'remote'
   {getWindowLoadSettings} = require './window-load-settings-helpers'
   AtomEnvironment = require '../src/atom-environment'
 
@@ -38,17 +42,18 @@ try
 
   legacyTestRunner = require(getWindowLoadSettings().legacyTestRunnerPath)
   testRunner = require(getWindowLoadSettings().testRunnerPath)
-  testRunner({
+  promise = testRunner({
     logFile: getWindowLoadSettings().logFile
     headless: getWindowLoadSettings().headless
     testPaths: getWindowLoadSettings().testPaths
     buildAtomEnvironment: (params) -> new AtomEnvironment(params)
     legacyTestRunner: legacyTestRunner
   })
+
+  promise.then(exitWithStatusCode) if getWindowLoadSettings().headless
 catch error
   if getWindowLoadSettings().headless
     console.error(error.stack ? error)
-    remote.require('app').emit('will-exit')
-    remote.process.exit(status)
+    exitWithStatusCode(1)
   else
     throw error