1 files changed, 81 insertions, 0 deletions
diff --git a/spec/support/shared_examples/services/boards/lists_create_service_shared_examples.rb b/spec/support/shared_examples/services/boards/lists_create_service_shared_examples.rb
new file mode 100644
index 00000000000..3be002c2126
--- /dev/null
+++ b/spec/support/shared_examples/services/boards/lists_create_service_shared_examples.rb
@@ -0,0 +1,81 @@
+# frozen_string_literal: true
+
+RSpec.shared_examples 'board lists create service' do
+  describe '#execute' do
+    let_it_be(:user) { create(:user) }
+
+    before_all do
+      parent.add_developer(user)
+    end
+
+    subject(:service) { described_class.new(parent, user, label_id: label.id) }
+
+    context 'when board lists is empty' do
+      it 'creates a new list at beginning of the list' do
+        response = service.execute(board)
+
+        expect(response.success?).to eq(true)
+        expect(response.payload[:list].position).to eq 0
+      end
+    end
+
+    context 'when board lists has the done list' do
+      it 'creates a new list at beginning of the list' do
+        response = service.execute(board)
+
+        expect(response.success?).to eq(true)
+        expect(response.payload[:list].position).to eq 0
+      end
+    end
+
+    context 'when board lists has labels lists' do
+      it 'creates a new list at end of the lists' do
+        create_list(position: 0)
+        create_list(position: 1)
+
+        response = service.execute(board)
+
+        expect(response.success?).to eq(true)
+        expect(response.payload[:list].position).to eq 2
+      end
+    end
+
+    context 'when board lists has label and done lists' do
+      it 'creates a new list at end of the label lists' do
+        list1 = create_list(position: 0)
+
+        list2 = service.execute(board).payload[:list]
+
+        expect(list1.reload.position).to eq 0
+        expect(list2.reload.position).to eq 1
+      end
+    end
+
+    context 'when provided label does not belong to the parent' do
+      it 'returns an error' do
+        label = create(:label, name: 'in-development')
+        service = described_class.new(parent, user, label_id: label.id)
+
+        response = service.execute(board)
+
+        expect(response.success?).to eq(false)
+        expect(response.errors).to include('Label not found')
+      end
+    end
+
+    context 'when backlog param is sent' do
+      it 'creates one and only one backlog list' do
+        service = described_class.new(parent, user, 'backlog' => true)
+        list = service.execute(board).payload[:list]
+
+        expect(list.list_type).to eq('backlog')
+        expect(list.position).to be_nil
+        expect(list).to be_valid
+
+        another_backlog = service.execute(board).payload[:list]
+
+        expect(another_backlog).to eq list
+      end
+    end
+  end
+end