Add feature test for project share

features/project/group_links.feature

+Feature: Project Group Links
+  Background:
+    Given I sign in as a user
+    And I own project "Shop"
+    And project "Shop" is shared with group "Ops"
+    And project "Shop" is not shared with group "Market"
+    And I visit project group links page
+
+  Scenario: I should see list of groups
+    Then I should see project already shared with group "Ops"
+    Then I should see project is not shared with group "Market"
+
+  Scenario: I share project with group
+    When I select group "Market" for share
+    Then I should see project is shared with group "Market"

features/steps/project/project_group_links.rb

+class Spinach::Features::ProjectGroupLinks < Spinach::FeatureSteps
+  include SharedAuthentication
+  include SharedProject
+  include SharedPaths
+
+  step 'I should see project already shared with group "Ops"' do
+    within '.enabled-groups' do
+      page.should have_content "Ops"
+    end
+  end
+
+  step 'I should see project is not shared with group "Market"' do
+    within '.enabled-groups' do
+      page.should_not have_content "Market"
+    end
+  end
+
+  step 'I select group "Market" for share' do
+    select "Master", from: 'group_access'
+    select "Market", from: 'group_id'
+    click_button "Share"
+  end
+
+  step 'I should see project is shared with group "Market"' do
+    within '.enabled-groups' do
+      page.should have_content "Market"
+    end
+  end
+
+  step 'project "Shop" is shared with group "Ops"' do
+    group = create(:group, name: 'Ops')
+    share_link = project.project_group_links.new(group_access: Gitlab::Access::MASTER)
+    share_link.group_id = group.id
+    share_link.save!
+  end
+
+  step 'project "Shop" is not shared with group "Market"' do
+    create(:group, name: 'Market')
+  end
+
+  step 'I visit project group links page' do
+    visit project_group_links_path(project)
+  end
+
+  def project
+    @project ||= Project.find_by_name "Shop"
+  end
+end