Compartmentalize test helper support

test/support/rails_app.rb

@@ -0,0 +1,21 @@
+class Foo < Rails::Application
+  if Rails::VERSION::MAJOR >= 4
+    config.eager_load = false
+    config.secret_key_base = 'abc123'
+    config.action_controller.perform_caching = true
+    config.active_support.test_order = :random
+    config.logger = Logger.new(nil)
+    ActionController::Base.cache_store = :memory_store
+  end
+end
+Foo.initialize!
+
+module TestHelper
+  Routes = ActionDispatch::Routing::RouteSet.new
+  Routes.draw do
+    get ':controller(/:action(/:id))'
+    get ':controller(/:action)'
+  end
+
+  ActionController::Base.send :include, Routes.url_helpers
+end

test/support/stream_capture.rb

@@ -0,0 +1,49 @@
+# Use cleaner stream testing interface from Rails 5 if available
+# see https://github.com/rails/rails/blob/29959eb59d/activesupport/lib/active_support/testing/stream.rb
+begin
+  require "active_support/testing/stream"
+rescue LoadError
+  module ActiveSupport
+    module Testing
+      module Stream #:nodoc:
+        private
+
+        def silence_stream(stream)
+          old_stream = stream.dup
+          stream.reopen(IO::NULL)
+          stream.sync = true
+          yield
+        ensure
+          stream.reopen(old_stream)
+          old_stream.close
+        end
+
+        def quietly
+          silence_stream(STDOUT) do
+            silence_stream(STDERR) do
+              yield
+            end
+          end
+        end
+
+        def capture(stream)
+          stream = stream.to_s
+          captured_stream = Tempfile.new(stream)
+          stream_io = eval("$#{stream}")
+          origin_stream = stream_io.dup
+          stream_io.reopen(captured_stream)
+
+          yield
+
+          stream_io.rewind
+          return captured_stream.read
+        ensure
+          captured_stream.close
+          captured_stream.unlink
+          stream_io.reopen(origin_stream)
+        end
+      end
+    end
+  end
+end
+

test/support/test_case.rb

@@ -0,0 +1,5 @@
+ActionController::TestCase.class_eval do
+  def setup
+    @routes = TestHelper::Routes
+  end
+end

test/test_helper.rb

@@ -6,12 +6,15 @@ require 'action_controller'
 require 'action_controller/test_case'
 require 'action_controller/railtie'
 require 'active_support/json'
-require 'minitest/autorun'
 require 'fileutils'
+FileUtils.mkdir_p(File.expand_path('../../tmp/cache', __FILE__))
+
+require 'minitest/autorun'
 # Ensure backward compatibility with Minitest 4
 Minitest::Test = MiniTest::Unit::TestCase unless defined?(Minitest::Test)
 
-require "capture_warnings"
+
+require 'capture_warnings'
 @capture_warnings = CaptureWarnings.new(fail_build = false)
 @capture_warnings.before_tests
 at_exit do
@@ -19,82 +22,10 @@ at_exit do
 end
 require 'active_model_serializers'
 
-# Use cleaner stream testing interface from Rails 5 if available
-# see https://github.com/rails/rails/blob/29959eb59d/activesupport/lib/active_support/testing/stream.rb
-begin
-  require "active_support/testing/stream"
-rescue LoadError
-  module ActiveSupport
-    module Testing
-      module Stream #:nodoc:
-        private
+require 'support/stream_capture'
 
-        def silence_stream(stream)
-          old_stream = stream.dup
-          stream.reopen(IO::NULL)
-          stream.sync = true
-          yield
-        ensure
-          stream.reopen(old_stream)
-          old_stream.close
-        end
-
-        def quietly
-          silence_stream(STDOUT) do
-            silence_stream(STDERR) do
-              yield
-            end
-          end
-        end
-
-        def capture(stream)
-          stream = stream.to_s
-          captured_stream = Tempfile.new(stream)
-          stream_io = eval("$#{stream}")
-          origin_stream = stream_io.dup
-          stream_io.reopen(captured_stream)
-
-          yield
-
-          stream_io.rewind
-          return captured_stream.read
-        ensure
-          captured_stream.close
-          captured_stream.unlink
-          stream_io.reopen(origin_stream)
-        end
-      end
-    end
-  end
-end
-
-class Foo < Rails::Application
-  if Rails::VERSION::MAJOR >= 4
-    config.eager_load = false
-    config.secret_key_base = 'abc123'
-    config.action_controller.perform_caching = true
-    config.active_support.test_order = :random
-    config.logger = Logger.new(nil)
-    ActionController::Base.cache_store = :memory_store
-  end
-end
-FileUtils.mkdir_p(File.expand_path('../../tmp/cache', __FILE__))
-Foo.initialize!
+require 'support/rails_app'
 
 require 'fixtures/poro'
 
-module TestHelper
-  Routes = ActionDispatch::Routing::RouteSet.new
-  Routes.draw do
-    get ':controller(/:action(/:id))'
-    get ':controller(/:action)'
-  end
-
-  ActionController::Base.send :include, Routes.url_helpers
-end
-
-ActionController::TestCase.class_eval do
-  def setup
-    @routes = TestHelper::Routes
-  end
-end
+require 'support/test_case'