1 files changed, 127 insertions, 0 deletions
diff --git a/spec/lib/sidebars/panel_spec.rb b/spec/lib/sidebars/panel_spec.rb
new file mode 100644
index 00000000000..b70a79361d0
--- /dev/null
+++ b/spec/lib/sidebars/panel_spec.rb
@@ -0,0 +1,127 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Sidebars::Panel do
+  let(:context) { Sidebars::Context.new(current_user: nil, container: nil) }
+  let(:panel) { Sidebars::Panel.new(context) }
+  let(:menu1) { Sidebars::Menu.new(context) }
+  let(:menu2) { Sidebars::Menu.new(context) }
+
+  describe '#renderable_menus' do
+    it 'returns only renderable menus' do
+      panel.add_menu(menu1)
+      panel.add_menu(menu2)
+
+      allow(menu1).to receive(:render?).and_return(true)
+      allow(menu2).to receive(:render?).and_return(false)
+
+      expect(panel.renderable_menus).to eq([menu1])
+    end
+  end
+
+  describe '#has_renderable_menus?' do
+    it 'returns false when no renderable menus' do
+      expect(panel.has_renderable_menus?).to be false
+    end
+
+    it 'returns true when no renderable menus' do
+      allow(menu1).to receive(:render?).and_return(true)
+
+      panel.add_menu(menu1)
+
+      expect(panel.has_renderable_menus?).to be true
+    end
+  end
+
+  describe '#add_element' do
+    it 'adds the element to the last position of the list' do
+      list = [1, 2]
+
+      panel.add_element(list, 3)
+
+      expect(list).to eq([1, 2, 3])
+    end
+
+    it 'does not add nil elements' do
+      list = []
+
+      panel.add_element(list, nil)
+
+      expect(list).to be_empty
+    end
+  end
+
+  describe '#insert_element_before' do
+    let(:user) { build(:user) }
+    let(:list) { [1, user] }
+
+    it 'adds element before the specific element class' do
+      panel.insert_element_before(list, User, 2)
+
+      expect(list).to eq [1, 2, user]
+    end
+
+    it 'does not add nil elements' do
+      panel.insert_element_before(list, User, nil)
+
+      expect(list).to eq [1, user]
+    end
+
+    context 'when reference element does not exist' do
+      it 'adds the element to the top of the list' do
+        panel.insert_element_before(list, Project, 2)
+
+        expect(list).to eq [2, 1, user]
+      end
+    end
+  end
+
+  describe '#insert_element_after' do
+    let(:user) { build(:user) }
+    let(:list) { [1, user] }
+
+    it 'adds element after the specific element class' do
+      panel.insert_element_after(list, Integer, 2)
+
+      expect(list).to eq [1, 2, user]
+    end
+
+    it 'does not add nil elements' do
+      panel.insert_element_after(list, Integer, nil)
+
+      expect(list).to eq [1, user]
+    end
+
+    context 'when reference element does not exist' do
+      it 'adds the element to the end of the list' do
+        panel.insert_element_after(list, Project, 2)
+
+        expect(list).to eq [1, user, 2]
+      end
+    end
+  end
+
+  describe '#replace_element' do
+    let(:user) { build(:user) }
+    let(:list) { [1, user] }
+
+    it 'replace existing element in the list' do
+      panel.replace_element(list, Integer, 2)
+
+      expect(list).to eq [2, user]
+    end
+
+    it 'does not add nil elements' do
+      panel.replace_element(list, Integer, nil)
+
+      expect(list).to eq [1, user]
+    end
+
+    it 'does not add the element if the other element is not found' do
+      panel.replace_element(list, Project, 2)
+
+      expect(list).to eq [1, user]
+    end
+  end
+end