renders version name depending on context

Versions being in the same project as the project the view is rendered
for get simply the name as their name attribute. Versions being in a
  different project as the project the view is rendered for get the
  project name prepended to the name as their name attribute. The later
  is also true for when no project is provided as the context.

app/views/api/experimental/versions/index.api.rabl

@@ -1,4 +1,10 @@
 
 collection @versions => :versions
-attributes :id,
-           :name
+attributes id: :id
+node(:name) do |version|
+  if version.project == @project
+    version.name
+  else
+    version.to_s_with_project
+  end
+end

spec/views/api/experimental/versions/index_api_json_spec.rb

@@ -28,12 +28,16 @@
 
 require File.expand_path('../../../../../spec_helper', __FILE__)
 
-describe 'api/experimental/versions/index.api.rabl', :type => :view do
+describe 'api/experimental/versions/index.api.rabl', type: :view do
+  let(:project_a) { FactoryGirl.build_stubbed(:project) }
+  let(:project_b) { FactoryGirl.build_stubbed(:project) }
+  let(:version_1)   { FactoryGirl.build_stubbed(:version, project: project_a) }
+  let(:version_2)   { FactoryGirl.build_stubbed(:version, project: project_a) }
+
   before do
     params[:format] = 'json'
 
     assign(:versions, versions)
-    render
   end
 
   subject { response.body }
@@ -41,19 +45,43 @@ describe 'api/experimental/versions/index.api.rabl', :type => :view do
   describe 'with no versions available' do
     let(:versions) { [] }
 
+    before do
+      render
+    end
+
     it { is_expected.to have_json_path('versions') }
     it { is_expected.to have_json_size(0).at_path('versions') }
   end
 
-  describe 'with 2 versions available' do
-    let(:versions) { [
-      FactoryGirl.build(:version), FactoryGirl.build(:version)
-    ] }
+  describe 'with 2 versions of the project' do
+    let(:versions) { [version_1, version_2] }
+    let(:version_1_json) { { id: version_1.id, name: version_1.name }.to_json }
+    let(:version_2_json) { { id: version_2.id, name: version_2.name }.to_json }
+
+    before do
+      assign(:project, project_a)
+      render
+    end
 
     it { is_expected.to have_json_path('versions') }
     it { is_expected.to have_json_size(2).at_path('versions') }
 
     it { is_expected.to have_json_type(Object).at_path('versions/1') }
-    it { is_expected.to have_json_path('versions/1/name')            }
+    it { is_expected.to include_json(version_1_json).at_path('versions') }
+    it { is_expected.to include_json(version_2_json).at_path('versions') }
+  end
+
+  describe 'with a version that is in a different project' do
+    let(:versions)  { [version_1] }
+    let(:version_1_json) { { id: version_1.id, name: version_1.to_s_with_project }.to_json }
+
+    before do
+      assign(:project, project_b)
+      render
+    end
+
+    it { is_expected.to have_json_path('versions') }
+    it { is_expected.to have_json_size(1).at_path('versions') }
+    it { is_expected.to include_json(version_1_json).at_path('versions') }
   end
 end