💚 Make sure to destroy AtomEnvironment in specs

spec/atom-environment-spec.coffee

@@ -227,6 +227,8 @@ describe "AtomEnvironment", ->
       expect(atomEnvironment.state.project).toEqual projectState
       expect(atomEnvironment.saveStateSync).toHaveBeenCalled()
 
+      atomEnvironment.destroy()
+
   describe "::destroy()", ->
     it "unsubscribes from all buffers", ->
       atomEnvironment = new AtomEnvironment(setRepresentedFilename: ->)

spec/window-event-handler-spec.coffee

@@ -10,7 +10,7 @@ describe "WindowEventHandler", ->
   [projectPath, windowEventHandler] = []
 
   beforeEach ->
-    atom.windowEventHandler.unsubscribe()
+    atom.uninstallWindowEventHandler()
     spyOn(atom, 'hide')
     initialPath = atom.project.getPaths()[0]
     spyOn(atom, 'getLoadSettings').andCallFake ->
@@ -23,6 +23,7 @@ describe "WindowEventHandler", ->
 
   afterEach ->
     windowEventHandler.unsubscribe()
+    atom.installWindowEventHandler()
 
   describe "when the window is loaded", ->
     it "doesn't have .is-blurred on the body tag", ->

src/atom-environment.coffee

@@ -194,7 +194,7 @@ class AtomEnvironment extends Model
     @registerDefaultViewProviders()
 
     @installUncaughtErrorHandler()
-    @windowEventHandler = new WindowEventHandler(this)
+    @installWindowEventHandler()
 
   setConfigSchema: ->
     @config.setSchema null, {type: 'object', properties: _.clone(require('./config-schema'))}
@@ -284,7 +284,7 @@ class AtomEnvironment extends Model
     @project?.destroy()
     @project = null
 
-    @windowEventHandler?.unsubscribe()
+    @uninstallWindowEventHandler()
 
   ###
   Section: Event Subscription
@@ -661,6 +661,12 @@ class AtomEnvironment extends Model
   uninstallUncaughtErrorHandler: ->
     window.onerror = @previousWindowErrorHandler
 
+  installWindowEventHandler: ->
+    @windowEventHandler = new WindowEventHandler(this)
+
+  uninstallWindowEventHandler: ->
+    @windowEventHandler?.unsubscribe()
+
   ###
   Section: Messaging the User
   ###