1 files changed, 39 insertions, 0 deletions
diff --git a/spec/services/resource_events/change_state_service_spec.rb b/spec/services/resource_events/change_state_service_spec.rb
new file mode 100644
index 00000000000..e5d2a4ab11e
--- /dev/null
+++ b/spec/services/resource_events/change_state_service_spec.rb
@@ -0,0 +1,39 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe ResourceEvents::ChangeStateService do
+  let_it_be(:project) { create(:project) }
+  let_it_be(:user) { create(:user) }
+
+  let(:issue) { create(:issue, project: project) }
+  let(:merge_request) { create(:merge_request, source_project: project) }
+
+  describe '#execute' do
+    context 'when resource is an issue' do
+      %w[opened reopened closed locked].each do |state|
+        it "creates the expected event if issue has #{state} state" do
+          described_class.new(user: user, resource: issue).execute(state)
+
+          event = issue.resource_state_events.last
+          expect(event.issue).to eq(issue)
+          expect(event.merge_request).to be_nil
+          expect(event.state).to eq(state)
+        end
+      end
+    end
+
+    context 'when resource is a merge request' do
+      %w[opened reopened closed locked merged].each do |state|
+        it "creates the expected event if merge request has #{state} state" do
+          described_class.new(user: user, resource: merge_request).execute(state)
+
+          event = merge_request.resource_state_events.last
+          expect(event.issue).to be_nil
+          expect(event.merge_request).to eq(merge_request)
+          expect(event.state).to eq(state)
+        end
+      end
+    end
+  end
+end