   MessageRegistry = require('../lib/message-registry')
   EditorLinter = require('../lib/editor-linter')
   LinterRegistry = require('../lib/linter-registry')
+  nextAnimationFrame = ->
+    return new Promise (resolve) -> requestAnimationFrame(resolve)
   getLinterRegistry = ->
     linterRegistry = new LinterRegistry
     editorLinter = new EditorLinter(atom.workspace.getActiveTextEditor())

        gotMessages = messages
      waitsForPromise ->
        linterRegistry.lint({onChange: false, editorLinter}).then ->
          setTimeout ->
            expect(gotMessages).toBeDefined()
            expect(gotMessages.length).toBe(1)
            linterRegistry.deactivate()
            messageRegistry.deactivate()
          , 1000

  describe '::deleteEditorMessages', ->
    it 'removes messages for that editor', ->

        messageRegistry.deleteEditorMessages(editor)
      waitsForPromise ->
        linterRegistry.lint({onChange: false, editorLinter}).then ->
          nextAnimationFrame().then ->
            expect(gotMessages).toBeDefined()
            expect(gotMessages.length).toBe(0)
            linterRegistry.deactivate()
            messageRegistry.deactivate()
