1 files changed, 69 insertions, 0 deletions
diff --git a/spec/services/merge_requests/request_review_service_spec.rb b/spec/services/merge_requests/request_review_service_spec.rb
new file mode 100644
index 00000000000..5cb4120852a
--- /dev/null
+++ b/spec/services/merge_requests/request_review_service_spec.rb
@@ -0,0 +1,69 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe MergeRequests::RequestReviewService do
+  let(:current_user) { create(:user) }
+  let(:user) { create(:user) }
+  let(:merge_request) { create(:merge_request, reviewers: [user]) }
+  let(:reviewer) { merge_request.find_reviewer(user) }
+  let(:project) { merge_request.project }
+  let(:service) { described_class.new(project, current_user) }
+  let(:result) { service.execute(merge_request, user) }
+  let(:todo_service) { spy('todo service') }
+  let(:notification_service) { spy('notification service') }
+
+  before do
+    allow(NotificationService).to receive(:new) { notification_service }
+    allow(service).to receive(:todo_service).and_return(todo_service)
+    allow(service).to receive(:notification_service).and_return(notification_service)
+
+    reviewer.update!(state: MergeRequestReviewer.states[:reviewed])
+
+    project.add_developer(current_user)
+    project.add_developer(user)
+  end
+
+  describe '#execute' do
+    describe 'invalid permissions' do
+      let(:service) { described_class.new(project, create(:user)) }
+
+      it 'returns an error' do
+        expect(result[:status]).to eq :error
+      end
+    end
+
+    describe 'reviewer does not exist' do
+      let(:result) { service.execute(merge_request, create(:user)) }
+
+      it 'returns an error' do
+        expect(result[:status]).to eq :error
+      end
+    end
+
+    describe 'reviewer exists' do
+      it 'returns success' do
+        expect(result[:status]).to eq :success
+      end
+
+      it 'updates reviewers state' do
+        service.execute(merge_request, user)
+        reviewer.reload
+
+        expect(reviewer.state).to eq 'unreviewed'
+      end
+
+      it 'sends email to reviewer' do
+        expect(notification_service).to receive_message_chain(:async, :review_requested_of_merge_request).with(merge_request, current_user, user)
+
+        service.execute(merge_request, user)
+      end
+
+      it 'creates a new todo for the reviewer' do
+        expect(todo_service).to receive(:create_request_review_todo).with(merge_request, current_user, user)
+
+        service.execute(merge_request, user)
+      end
+    end
+  end
+end