Extract user acceptance test helpers in a module

features/cli/debug.feature

@@ -2,4 +2,4 @@ Feature: debug CLI option
 
   Scenario: raises the logger level to DEBUG
     When I run uhwm with option -d
-    Then the current output must match /log.+debug.+level/i
+    Then the output must match /log.+debug.+level/i

features/cli/ruby_features.feature

@@ -2,4 +2,4 @@ Feature: ruby feature require CLI option
 
   Scenario: requires a ruby feature
     When I run uhwm with option -v -r abbrev
-    Then the current output must match /load.+abbrev.+ruby feature/i
+    Then the output must match /load.+abbrev.+ruby feature/i

features/cli/verbose.feature

@@ -2,4 +2,4 @@ Feature: verbose CLI option
 
   Scenario: raises the logger level to INFO
     When I run uhwm with option -v
-    Then the current output must match /log.+info.+level/i
+    Then the output must match /log.+info.+level/i

features/layout/registration.feature

@@ -10,4 +10,4 @@ Feature: layout registration
       end
       """
     When I run uhwm with option -r./layout -l Layout
-    Then the current output must contain current display
+    Then the output must contain current display

features/manager/check_other_wm.feature

@@ -5,4 +5,4 @@ Feature: checking if another window manager is running
     Given another window manager is running
     When I start uhwm
     Then the exit status must be 70
-    And the current output must match /error.+other.+window.+manager/i
+    And the output must match /error.+other.+window.+manager/i

features/steps/output_steps.rb

@@ -1,20 +1,3 @@
-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
-
 Then /^the output must contain exactly the usage$/ do
   assert_exact_output <<-eoh, all_output
 Usage: uhwm [options]
@@ -29,17 +12,13 @@ options:
 end
 
 Then /^the output must match \/([^\/]+)\/([a-z]*)$/ do |pattern, options|
-  expect(@process.stdout).to match Regexp.new(pattern, options)
-end
-
-Then /^the current output must match \/([^\/]+)\/([a-z]*)$/ do |pattern, options|
   uhwm_wait_output Regexp.new(pattern, options)
 end
 
-Then /^the current output must contain:$/ do |content|
+Then /^the output must contain:$/ do |content|
   uhwm_wait_output content.to_s
 end
 
-Then /^the current output must contain current display$/ do
+Then /^the output must contain current display$/ do
   uhwm_wait_output ENV['DISPLAY']
 end

features/steps/run_steps.rb

@@ -1,16 +1,5 @@
-def uhwm_run options = '-v'
-  command = %w[uhwm]
-  command << options if options
-  @interactive = @process = run command.join ' '
-end
-
-def uhwm_run_wait_ready
-  uhwm_run
-  uhwm_wait_output 'Connected to'
-end
-
 Given /^another window manager is running$/ do
-  expect(@other_wm).to be_alive
+  expect(other_wm).to be_alive
 end
 
 Given /^uhwm is running$/ do

features/steps/x_steps.rb

@@ -1,21 +1,8 @@
-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
-
 When /^I press the default quit key binding$/ do
   x_key 'alt+q'
 end
 
 Then /^it must connect to X display$/ do
   uhwm_wait_output 'Connected to'
-  expect(x_socket_check @process.pid).to be true
+  expect(x_socket_check uhwm_pid).to be true
 end

features/support/env.rb

@@ -1,6 +1,8 @@
 require 'aruba/cucumber'
 require 'headless'
 
+require 'uh/wm/testing/acceptance_helpers'
+
 module Aruba
   class SpawnProcess
     def pid
@@ -9,15 +11,14 @@ module Aruba
   end
 end
 
+World(Uh::WM::Testing::AcceptanceHelpers)
+
 Headless.new.start
 
 After do |scenario|
-  @process and @process.terminate
+  uhwm_ensure_stop
 end
 
 Around '@other_wm_running' do |scenario, block|
-  @other_wm = ChildProcess.build('twm')
-  @other_wm.start
-  block.call
-  @other_wm.stop
+  with_other_wm { block.call }
 end

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