pull out some of the task behavior

Author: searls

lib/tasks/jasmine-rails_tasks.rake

@@ -1,33 +1,50 @@
 namespace :spec do
-  def run_cmd(cmd)
-    puts "$ #{cmd}"
-    unless system(cmd)
-      raise "Error executing command: #{cmd}"
+
+  desc "run test with phantomjs"
+  task :javascript => [:environment] do
+    override_rails_config do
+      include_offline_asset_paths_helper
+      spec_filter = ENV['SPEC']
+      html = get_spec_runner(spec_filter)
+      runner_path = Rails.root.join('spec/tmp/runner.html')
+      File.open(runner_path, 'w') {|f| f << html.gsub('/assets', './assets')}
+
+      run_cmd %{phantomjs "#{File.join(File.dirname(__FILE__), 'runner.js')}" "file://#{runner_path.to_s}?spec=#{spec_filter}"}
     end
   end
 
-  desc "run test with phantomjs"
-  task :javascript => :environment do
-    original_debug_setting = Rails.application.config.assets.debug
-    Rails.application.config.assets.debug = false
+  def include_offline_asset_paths_helper
     require 'jasmine_rails/offline_asset_paths'
     if Rails::VERSION::MAJOR >= 4
       Sprockets::Rails::Helper.send :include, JasmineRails::OfflineAssetPaths
     else
       ActionView::AssetPaths.send :include, JasmineRails::OfflineAssetPaths
     end
-    spec_filter = ENV['SPEC']
+  end
+
+  def override_rails_config
+    config = Rails.application.config
+
+    original_asssets_debug = config.assets.debug
+    config.assets.debug = false
+    yield
+    config.assets.debug = original_asssets_debug
+  end
+
+  def get_spec_runner(spec_filter)
     app = ActionController::Integration::Session.new(Rails.application)
     path = JasmineRails.route_path
     app.get path, :console => 'true', :spec => spec_filter
     JasmineRails::OfflineAssetPaths.disabled = true
     raise "Jasmine runner at '#{path}' returned a #{app.response.status} error: #{app.response.message}" unless app.response.success?
-    html = app.response.body
-    runner_path = Rails.root.join('spec/tmp/runner.html')
-    File.open(runner_path, 'w') {|f| f << html.gsub('/assets', './assets')}
+    app.response.body
+  end
 
-    run_cmd %{phantomjs "#{File.join(File.dirname(__FILE__), 'runner.js')}" "file://#{runner_path.to_s}?spec=#{spec_filter}"}
-    Rails.application.config.assets.debug = original_debug_setting
+  def run_cmd(cmd)
+    puts "Running `#{cmd}`"
+    unless system(cmd)
+      raise "Error executing command: #{cmd}"
+    end
   end
 
   # alias