1 files changed, 52 insertions, 0 deletions
diff --git a/spec/models/work_items/widgets/hierarchy_spec.rb b/spec/models/work_items/widgets/hierarchy_spec.rb
new file mode 100644
index 00000000000..0141731529b
--- /dev/null
+++ b/spec/models/work_items/widgets/hierarchy_spec.rb
@@ -0,0 +1,52 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe WorkItems::Widgets::Hierarchy do
+  let_it_be(:work_item) { create(:work_item) }
+
+  describe '.type' do
+    subject { described_class.type }
+
+    it { is_expected.to eq(:hierarchy) }
+  end
+
+  describe '#type' do
+    subject { described_class.new(work_item).type }
+
+    it { is_expected.to eq(:hierarchy) }
+  end
+
+  describe '#parent' do
+    let_it_be(:parent_link) { create(:parent_link) }
+
+    subject { described_class.new(parent_link.work_item).parent }
+
+    it { is_expected.to eq parent_link.work_item_parent }
+
+    context 'when work_items_hierarchy flag is disabled' do
+      before do
+        stub_feature_flags(work_items_hierarchy: false)
+      end
+
+      it { is_expected.to be_nil }
+    end
+  end
+
+  describe '#children' do
+    let_it_be(:parent_link1) { create(:parent_link, work_item_parent: work_item) }
+    let_it_be(:parent_link2) { create(:parent_link, work_item_parent: work_item) }
+
+    subject { described_class.new(work_item).children }
+
+    it { is_expected.to match_array([parent_link1.work_item, parent_link2.work_item]) }
+
+    context 'when work_items_hierarchy flag is disabled' do
+      before do
+        stub_feature_flags(work_items_hierarchy: false)
+      end
+
+      it { is_expected.to be_empty }
+    end
+  end
+end