1 files changed, 97 insertions, 0 deletions
diff --git a/spec/services/work_items/create_from_task_service_spec.rb b/spec/services/work_items/create_from_task_service_spec.rb
new file mode 100644
index 00000000000..b4db925f053
--- /dev/null
+++ b/spec/services/work_items/create_from_task_service_spec.rb
@@ -0,0 +1,97 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe WorkItems::CreateFromTaskService do
+  let_it_be(:project) { create(:project) }
+  let_it_be(:developer) { create(:user) }
+  let_it_be(:list_work_item, refind: true) { create(:work_item, project: project, description: "- [ ] Item to be converted\n    second line\n    third line") }
+
+  let(:work_item_to_update) { list_work_item }
+  let(:spam_params) { double }
+  let(:link_params) { {} }
+  let(:current_user) { developer }
+  let(:params) do
+    {
+      title: 'Awesome work item',
+      work_item_type_id: WorkItems::Type.default_by_type(:task).id,
+      line_number_start: 1,
+      line_number_end: 3,
+      lock_version: work_item_to_update.lock_version
+    }
+  end
+
+  before_all do
+    project.add_developer(developer)
+  end
+
+  shared_examples 'CreateFromTask service with invalid params' do
+    it { is_expected.to be_error }
+
+    it 'does not create a work item or links' do
+      expect do
+        service_result
+      end.to not_change(WorkItem, :count).and(
+        not_change(IssueLink, :count)
+      )
+    end
+  end
+
+  describe '#execute' do
+    subject(:service_result) { described_class.new(work_item: work_item_to_update, current_user: current_user, work_item_params: params, spam_params: spam_params).execute }
+
+    before do
+      stub_spam_services
+    end
+
+    context 'when work item params are valid' do
+      it { is_expected.to be_success }
+
+      it 'creates a work item and links it to the original work item successfully' do
+        expect do
+          service_result
+        end.to change(WorkItem, :count).by(1).and(
+          change(IssueLink, :count)
+        )
+      end
+
+      it 'replaces the original issue markdown description with new work item reference' do
+        service_result
+
+        created_work_item = WorkItem.last
+
+        expect(list_work_item.description).to eq("- [ ] #{created_work_item.to_reference}+")
+      end
+    end
+
+    context 'when last operation fails' do
+      before do
+        params.merge!(line_number_start: 0)
+      end
+
+      it 'rollbacks all operations' do
+        expect do
+          service_result
+        end.to not_change(WorkItem, :count).and(
+          not_change(IssueLink, :count)
+        )
+      end
+
+      it { is_expected.to be_error }
+
+      it 'returns an error message' do
+        expect(service_result.errors).to contain_exactly('line_number_start must be greater than 0')
+      end
+    end
+
+    context 'when work item params are invalid' do
+      let(:params) { { title: '' } }
+
+      it_behaves_like 'CreateFromTask service with invalid params'
+
+      it 'returns work item errors' do
+        expect(service_result.errors).to contain_exactly("Title can't be blank")
+      end
+    end
+  end
+end