Prototype clients management with windows

features/steps/x_steps.rb

@@ -2,6 +2,10 @@ When /^I press the ([^ ]+) keys?$/ do |keys|
   x_key keys
 end
 
+When /^a window requests to be mapped$/ do
+  x_window_map
+end
+
 Then /^it must connect to X display$/ do
   uhwm_wait_output 'Connected to'
   expect(x_socket_check uhwm_pid).to be true