Test scoped header store per platform

For #1249

CHANGELOG.md

@@ -180,6 +180,7 @@ To install or update CocoaPods see this [guide](http://docs.cocoapods.org/guides
 
 * Proper scoping of header search paths to the target platform.  
   [Michael Melanson](https://github.com/michaelmelanson)
+  [Kyle Fuller](https://github.com/kylef)
   [#1249](https://github.com/CocoaPods/CocoaPods/issues/1249)
 
 

spec/unit/sandbox/headers_store_spec.rb

@@ -46,5 +46,14 @@ module Pod
     it 'always adds the Headers root to the header search paths' do
       @header_dir.search_paths(:fake_platform).should.include('${PODS_ROOT}/Headers/Public')
     end
+
+    it 'only exposes header search paths for the given platform' do
+      @header_dir.add_search_path('iOS Search Path', :ios)
+      @header_dir.add_search_path('OS X Search Path', :osx)
+      @header_dir.search_paths(:ios).sort.should == [
+        "${PODS_ROOT}/Headers/Public",
+        "${PODS_ROOT}/Headers/Public/iOS Search Path",
+      ]
+    end
   end
 end