Add test task that runs packages specs from queue

Gruntfile.coffee

@@ -181,7 +181,7 @@ module.exports = (grunt) ->
 
   grunt.registerTask('compile', ['coffee', 'prebuild-less', 'cson'])
   grunt.registerTask('lint', ['coffeelint', 'csslint', 'lesslint'])
-  grunt.registerTask('test', ['shell:kill-atom', 'shell:test'])
+  grunt.registerTask('test', ['shell:kill-atom', 'run-specs'])
   grunt.registerTask('ci', ['lint', 'update-atom-shell', 'build', 'set-development-version', 'test'])
   grunt.registerTask('deploy', ['partial-clean', 'update-atom-shell', 'build', 'codesign'])
   grunt.registerTask('docs', ['markdown:guides', 'build-docs'])

tasks/test-task.coffee

@@ -0,0 +1,33 @@
+fs = require 'fs'
+path = require 'path'
+
+async = require 'async'
+
+module.exports = (grunt) ->
+  {spawn} = require('./task-helpers')(grunt)
+
+  grunt.registerTask 'run-specs', 'Run the specs', ->
+    passed = true
+    done = @async()
+
+    queue = async.queue (packagePath, callback) ->
+      options =
+        cmd: path.resolve('node_modules/.bin/apm')
+        args: ['test', '-p', path.resolve('atom.sh')]
+        opts:
+          cwd: packagePath
+      spawn options, (error, results, code) ->
+        passed = passed and code is 0
+        callback()
+
+    modulesDirectory = path.resolve('node_modules')
+    for packageDirectory in fs.readdirSync(modulesDirectory)
+      packagePath = path.join(modulesDirectory, packageDirectory)
+      continue unless grunt.file.isDir(path.join(packagePath, 'spec'))
+      try
+        {engines} = grunt.file.readJSON(path.join(packagePath, 'package.json')) ? {}
+        queue.push(packagePath) if engines.atom?
+        break
+
+    queue.concurrency = 1
+    queue.drain = -> done(passed)