Test how manager should handle destroyed windows

features/manager/unmanage.feature

@@ -1,7 +1,13 @@
 Feature: manager client unmanagement
 
-  Scenario: logs when a new client is unmanaged
+  Background:
     Given uhwm is running
     And a window is mapped
+
+  Scenario: logs when a new client is unmanaged
     When the window requests to be unmapped
     Then the output must match /unmanag.+xclient/i
+
+  Scenario: unmanages client on destroy notify X events
+    When the window is destroyed
+    Then the output must match /unmanag.+xclient/i

features/steps/x_steps.rb

@@ -26,6 +26,10 @@ When /^a window requests to be mapped (\d+) times$/ do |times|
   x_window_map times: times.to_i
 end
 
+When /^the window is destroyed$/ do
+  x_window_destroy
+end
+
 Then /^it must connect to X display$/ do
   uhwm_wait_output 'Connected to'
   expect(x_socket_check uhwm_pid).to be true

lib/uh/wm/testing/acceptance_helpers.rb

@@ -106,6 +106,11 @@ module Uh
           x_client(options).sync
         end
 
+        def x_window_destroy **options
+          x_client(options).destroy
+          x_client(options).sync
+        end
+
         def x_clients_ensure_stop
           @x_clients and @x_clients.any? and @x_clients.values.each &:terminate
         end
@@ -177,6 +182,11 @@ module Uh
             window.unmap
             self
           end
+
+          def destroy
+            window.destroy
+            self
+          end
         end
       end
     end