Extract user acceptance test helpers in a module

lib/uh/wm/testing/acceptance_helpers.rb

@@ -0,0 +1,69 @@
+module Uh
+  module WM
+    module Testing
+      module AcceptanceHelpers
+        def uhwm_run options = '-v'
+          command = %w[uhwm]
+          command << options if options
+          @interactive = @process = run command.join ' '
+        end
+
+        def uhwm_ensure_stop
+          @process and @process.terminate
+        end
+
+        def uhwm_pid
+          @process.pid
+        end
+
+        def uhwm_output
+          @process.stdout
+        end
+
+        def uhwm_wait_output message, timeout: 1
+          Timeout.timeout(timeout) do
+            loop do
+              break if case message
+                when Regexp then @process.stdout + @process.stderr =~ message
+                when String then assert_partial_output_interactive message
+              end
+              sleep 0.1
+            end
+          end
+        rescue Timeout::Error
+          fail [
+            "expected `#{message}' not seen after #{timeout} seconds in:",
+            "  ```\n  #{@process.stdout + @process.stderr}  ```"
+          ].join "\n"
+        end
+
+        def uhwm_run_wait_ready
+          uhwm_run
+          uhwm_wait_output 'Connected to'
+        end
+
+        def with_other_wm
+          @other_wm = ChildProcess.build('twm').tap { |o| o.start }
+          @other_wm.stop
+        end
+
+        def other_wm
+          @other_wm
+        end
+
+        def x_key key
+          fail "cannot simulate X key `#{key}'" unless system "xdotool key #{key}"
+        end
+
+        def x_socket_check pid
+          case RbConfig::CONFIG['host_os']
+          when /linux/
+            `netstat -xp 2> /dev/null`.lines.grep /\s+#{pid}\/ruby/
+          else
+            `sockstat -u`.lines.grep /\s+ruby.+\s+#{pid}/
+          end.any?
+        end
+      end
+    end
+  end
+end