[Spec][Refactor] Move specs in subcontext and extracted shared behavior

To reduce code duplication

spec/unit/installer/user_project_integrator_spec.rb

@@ -55,9 +55,13 @@ module Pod
           UI.warnings.should.include?('The Podfile does not contain any dependencies')
         end
 
-        it 'check that the integrated target does not override the CocoaPods build settings' do
+        describe '#warn_about_xcconfig_overrides' do
+          before do
             UI.warnings = ''
-          target_config = stub(:name => 'Release', :build_settings => { 'GCC_PREPROCESSOR_DEFINITIONS' => ['FLAG=1'] })
+          end
+
+          shared 'warn_about_xcconfig_overrides' do
+            target_config = stub(:name => 'Release', :build_settings => @user_target_build_settings)
             user_target = stub(:name => 'SampleProject', :build_configurations => [target_config])
             @target.stubs(:user_targets).returns([user_target])
 
@@ -66,37 +70,27 @@ module Pod
 
             @integrator.unstub(:warn_about_xcconfig_overrides)
             @integrator.send(:warn_about_xcconfig_overrides)
+          end
+
+          it 'check that the integrated target does not override the CocoaPods build settings' do
+            @user_target_build_settings = { 'GCC_PREPROCESSOR_DEFINITIONS' => ['FLAG=1'] }
+            behaves_like 'warn_about_xcconfig_overrides'
             UI.warnings.should.include 'The `SampleProject [Release]` target ' \
               'overrides the `GCC_PREPROCESSOR_DEFINITIONS` build setting'
           end
 
           it 'allows the use of the alternate form of the inherited flag' do
-          UI.warnings = ''
-          target_config = stub(:name => 'Release', :build_settings => { 'GCC_PREPROCESSOR_DEFINITIONS' => ['FLAG=1', '${inherited}'] })
-          user_target = stub(:name => 'SampleProject', :build_configurations => [target_config])
-          @target.stubs(:user_targets).returns([user_target])
-
-          @target.xcconfigs['Release'] = { 'GCC_PREPROCESSOR_DEFINITIONS' => 'COCOAPODS=1' }
-          @integrator = UserProjectIntegrator.new(@podfile, config.sandbox, temporary_directory, [@target])
-
-          @integrator.unstub(:warn_about_xcconfig_overrides)
-          @integrator.send(:warn_about_xcconfig_overrides)
+            @user_target_build_settings = { 'GCC_PREPROCESSOR_DEFINITIONS' => ['FLAG=1', '${inherited}'] }
+            behaves_like 'warn_about_xcconfig_overrides'
             UI.warnings.should.not.include 'GCC_PREPROCESSOR_DEFINITIONS'
           end
 
           it 'allows build settings which inherit the settings form the CocoaPods xcconfig' do
-          UI.warnings = ''
-          target_config = stub(:name => 'Release', :build_settings => { 'GCC_PREPROCESSOR_DEFINITIONS' => ['FLAG=1', '$(inherited)'] })
-          user_target = stub(:name => 'SampleProject', :build_configurations => [target_config])
-          @target.stubs(:user_targets).returns([user_target])
-
-          @target.xcconfigs['Release'] = { 'GCC_PREPROCESSOR_DEFINITIONS' => 'COCOAPODS=1' }
-          @integrator = UserProjectIntegrator.new(@podfile, config.sandbox, temporary_directory, [@target])
-
-          @integrator.unstub(:warn_about_xcconfig_overrides)
-          @integrator.send(:warn_about_xcconfig_overrides)
+            @user_target_build_settings = { 'GCC_PREPROCESSOR_DEFINITIONS' => ['FLAG=1', '$(inherited)'] }
+            behaves_like 'warn_about_xcconfig_overrides'
             UI.warnings.should.not.include 'GCC_PREPROCESSOR_DEFINITIONS'
           end
+        end
 
       end