1 files changed, 68 insertions, 0 deletions
diff --git a/spec/models/concerns/group_hierarchy_spec.rb b/spec/models/concerns/group_hierarchy_spec.rb
index 14ac910c90d..1f4fab88781 100644
--- a/spec/models/concerns/group_hierarchy_spec.rb
+++ b/spec/models/concerns/group_hierarchy_spec.rb
@@ -29,6 +29,40 @@ describe GroupHierarchy, :nested_groups do
         expect(subsub_group.parent).to eq(subgroup)
       end
     end
+
+    describe '#merge_hierarchy' do
+      it 'combines hierarchies' do
+        other_subgroup = create(:group, parent: parent)
+
+        expected_hierarchy = { parent => [{ subgroup => subsub_group }, other_subgroup] }
+
+        expect(subsub_group.merge_hierarchy(other_subgroup)).to eq(expected_hierarchy)
+      end
+    end
+
+    describe '.merge_hierarchies' do
+      it 'combines hierarchies until the top' do
+        other_subgroup = create(:group, parent: parent)
+        other_subsub_group = create(:group, parent: subgroup)
+
+        groups = [other_subgroup, subsub_group, other_subsub_group]
+
+        expected_hierarchy = { parent => [other_subgroup, { subgroup => [subsub_group, other_subsub_group] }] }
+
+        expect(described_class.merge_hierarchies(groups)).to eq(expected_hierarchy)
+      end
+
+      it 'combines upto a given parent' do
+        other_subgroup = create(:group, parent: parent)
+        other_subsub_group = create(:group, parent: subgroup)
+
+        groups = [other_subgroup, subsub_group, other_subsub_group]
+
+        expected_hierarchy = [other_subgroup, { subgroup => [subsub_group, other_subsub_group] }]
+
+        expect(described_class.merge_hierarchies(groups, parent)).to eq(expected_hierarchy)
+      end
+    end
   end
 
   context 'for a project' do
@@ -57,5 +91,39 @@ describe GroupHierarchy, :nested_groups do
         expect(project.parent).to eq(subsub_group)
       end
     end
+
+    describe '#merge_hierarchy' do
+      it 'combines hierarchies' do
+        project = create(:project, namespace: parent)
+
+        expected_hierarchy = { parent => [{ subgroup => subsub_group }, project] }
+
+        expect(subsub_group.merge_hierarchy(project)).to eq(expected_hierarchy)
+      end
+    end
+
+    describe '.merge_hierarchies' do
+      it 'combines hierarchies until the top' do
+        other_project = create(:project, namespace: parent)
+        other_subgroup_project = create(:project, namespace: subgroup)
+
+        elements = [other_project, subsub_group, other_subgroup_project]
+
+        expected_hierarchy = { parent => [other_project, { subgroup => [subsub_group, other_subgroup_project] }] }
+
+        expect(described_class.merge_hierarchies(elements)).to eq(expected_hierarchy)
+      end
+
+      it 'combines upto a given parent' do
+        other_project = create(:project, namespace: parent)
+        other_subgroup_project = create(:project, namespace: subgroup)
+
+        elements = [other_project, subsub_group, other_subgroup_project]
+
+        expected_hierarchy = [other_project, { subgroup => [subsub_group, other_subgroup_project] }]
+
+        expect(described_class.merge_hierarchies(elements, parent)).to eq(expected_hierarchy)
+      end
+    end
   end
 end