[PreInstallHooksContext] Ensure the `sandbox_root` attribute is set

CHANGELOG.md

@@ -38,6 +38,9 @@ To install release candidates run `[sudo] gem install cocoapods --pre`
   multiple root-level Xcode projects.  
   [Samuel Giddins](https://github.com/segiddins)
 
+* Ensure the `sandbox_root` attribute is set on the pre-install hooks context.  
+  [Samuel Giddins](https://github.com/segiddins)
+
 
 ## 1.0.0.beta.1 (2015-12-30)
 

lib/cocoapods/installer/pre_install_hooks_context.rb

@@ -33,6 +33,7 @@ module Pod
         result = new
         result.podfile = podfile
         result.sandbox = sandbox
+        result.sandbox_root = sandbox.root.to_s
         result.lockfile = lockfile
         result
       end

spec/unit/installer/pre_install_hooks_context_spec.rb

-
 require File.expand_path('../../../spec_helper', __FILE__)
 
 module Pod
   describe Installer::PreInstallHooksContext do
     it 'offers a convenience method to be generated' do
-      sandbox = stub
+      sandbox = stub(:root => Pathname('root'))
       podfile = stub
       lockfile = stub
 
       result = Installer::PreInstallHooksContext.generate(sandbox, podfile, lockfile)
       result.class.should == Installer::PreInstallHooksContext
       result.sandbox.should == sandbox
+      result.sandbox_root == 'root'
       result.podfile.should == podfile
       result.lockfile.should == lockfile
     end