1 files changed, 28 insertions, 0 deletions
diff --git a/spec/models/resource_state_event_spec.rb b/spec/models/resource_state_event_spec.rb
index 1381b45cf9e..fc6575b2db8 100644
--- a/spec/models/resource_state_event_spec.rb
+++ b/spec/models/resource_state_event_spec.rb
@@ -11,4 +11,32 @@ RSpec.describe ResourceStateEvent, type: :model do
   it_behaves_like 'a resource event'
   it_behaves_like 'a resource event for issues'
   it_behaves_like 'a resource event for merge requests'
+
+  describe 'validations' do
+    describe 'Issuable validation' do
+      it 'is valid if an issue is set' do
+        subject.attributes = { issue: build_stubbed(:issue), merge_request: nil }
+
+        expect(subject).to be_valid
+      end
+
+      it 'is valid if a merge request is set' do
+        subject.attributes = { issue: nil, merge_request: build_stubbed(:merge_request) }
+
+        expect(subject).to be_valid
+      end
+
+      it 'is invalid if both issue and merge request are set' do
+        subject.attributes = { issue: build_stubbed(:issue), merge_request: build_stubbed(:merge_request) }
+
+        expect(subject).not_to be_valid
+      end
+
+      it 'is invalid if there is no issuable set' do
+        subject.attributes = { issue: nil, merge_request: nil }
+
+        expect(subject).not_to be_valid
+      end
+    end
+  end
 end