1 files changed, 28 insertions, 6 deletions
diff --git a/spec/requests/api/graphql/project/fork_details_spec.rb b/spec/requests/api/graphql/project/fork_details_spec.rb
index efd48b00833..91a04dc7c50 100644
--- a/spec/requests/api/graphql/project/fork_details_spec.rb
+++ b/spec/requests/api/graphql/project/fork_details_spec.rb
@@ -10,12 +10,13 @@ RSpec.describe 'getting project fork details', feature_category: :source_code_ma
   let_it_be(:current_user) { create(:user, maintainer_projects: [project]) }
   let_it_be(:forked_project) { fork_project(project, current_user, repository: true) }
 
+  let(:ref) { 'feature' }
   let(:queried_project) { forked_project }
 
   let(:query) do
     graphql_query_for(:project,
       { full_path: queried_project.full_path }, <<~QUERY
-      forkDetails(ref: "feature"){
+      forkDetails(ref: "#{ref}"){
         ahead
         behind
       }
@@ -23,12 +24,23 @@ RSpec.describe 'getting project fork details', feature_category: :source_code_ma
     )
   end
 
-  it 'returns fork details' do
-    post_graphql(query, current_user: current_user)
+  context 'when a ref is specified' do
+    using RSpec::Parameterized::TableSyntax
 
-    expect(graphql_data['project']['forkDetails']).to eq(
-      { 'ahead' => 1, 'behind' => 29 }
-    )
+    where(:ref, :counts) do
+      'feature' | { 'ahead' => 1, 'behind' => 29 }
+      'v1.1.1' | { 'ahead' => 5, 'behind' => 0 }
+      '7b5160f9bb23a3d58a0accdbe89da13b96b1ece9' | { 'ahead' => 9, 'behind' => 0 }
+      'non-existent-branch' | { 'ahead' => nil, 'behind' => nil }
+    end
+
+    with_them do
+      it 'returns fork details' do
+        post_graphql(query, current_user: current_user)
+
+        expect(graphql_data['project']['forkDetails']).to eq(counts)
+      end
+    end
   end
 
   context 'when a project is not a fork' do
@@ -41,6 +53,16 @@ RSpec.describe 'getting project fork details', feature_category: :source_code_ma
     end
   end
 
+  context 'when project source is not visible' do
+    it 'does not return fork details' do
+      project.team.truncate
+
+      post_graphql(query, current_user: current_user)
+
+      expect(graphql_data['project']['forkDetails']).to be_nil
+    end
+  end
+
   context 'when a user cannot read the code' do
     let_it_be(:current_user) { create(:user) }