Instanciate Manager with a mandatory Dispatcher

lib/uh/wm/manager.rb

@@ -3,8 +3,9 @@ module Uh
     class Manager
       attr_reader :display
 
-      def initialize display = Display.new
-        @display = display
+      def initialize events, display = Display.new
+        @events   = events
+        @display  = display
       end
 
       def connect

lib/uh/wm/runner.rb

@@ -10,10 +10,10 @@ module Uh
 
       attr_reader :env, :events, :manager
 
-      def initialize env, manager: Manager.new, stopped: false
+      def initialize env, manager: nil, stopped: false
         @env      = env
         @events   = Dispatcher.new
-        @manager  = manager
+        @manager  = manager || Manager.new(@events)
         @stopped  = stopped
       end
 

spec/uh/wm/manager_spec.rb

@@ -1,8 +1,9 @@
 module Uh
   module WM
     RSpec.describe Manager do
+      let(:events)      { Dispatcher.new }
       let(:display)     { Display.new }
-      subject(:manager) { described_class.new display }
+      subject(:manager) { described_class.new events, display }
 
       describe '#initialize' do
         it 'assigns a new display' do