1 files changed, 20 insertions, 0 deletions
diff --git a/spec/graphql/graphql_triggers_spec.rb b/spec/graphql/graphql_triggers_spec.rb
new file mode 100644
index 00000000000..0b53c633077
--- /dev/null
+++ b/spec/graphql/graphql_triggers_spec.rb
@@ -0,0 +1,20 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe GraphqlTriggers do
+  describe '.issuable_assignees_updated' do
+    it 'triggers the issuableAssigneesUpdated subscription' do
+      assignees = create_list(:user, 2)
+      issue = create(:issue, assignees: assignees)
+
+      expect(GitlabSchema.subscriptions).to receive(:trigger).with(
+        'issuableAssigneesUpdated',
+        { issuable_id: issue.to_gid },
+        issue
+      )
+
+      GraphqlTriggers.issuable_assignees_updated(issue)
+    end
+  end
+end