1 files changed, 41 insertions, 0 deletions

diff --git a/spec/requests/api/graphql/mutations/issues/update_spec.rb b/spec/requests/api/graphql/mutations/issues/update_spec.rb
new file mode 100644
index 00000000000..fd983c683be
--- /dev/null
+++ b/spec/requests/api/graphql/mutations/issues/update_spec.rb
@@ -0,0 +1,41 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe 'Update of an existing issue' do
+  include GraphqlHelpers
+
+  let_it_be(:current_user) { create(:user) }
+  let_it_be(:project) { create(:project, :public) }
+  let_it_be(:issue) { create(:issue, project: project) }
+  let(:input) do
+    {
+      project_path: project.full_path,
+      iid: issue.iid.to_s,
+      locked: true
+    }
+  end
+
+  let(:mutation) { graphql_mutation(:update_issue, input) }
+  let(:mutation_response) { graphql_mutation_response(:update_issue) }
+
+  context 'the user is not allowed to update issue' do
+    it_behaves_like 'a mutation that returns top-level errors',
+      errors: ['The resource that you are attempting to access does not exist or you don\'t have permission to perform this action']
+  end
+
+  context 'when user has permissions to update issue' do
+    before do
+      project.add_developer(current_user)
+    end
+
+    it 'updates the issue' do
+      post_graphql_mutation(mutation, current_user: current_user)
+
+      expect(response).to have_gitlab_http_status(:success)
+      expect(mutation_response['issue']).to include(
+        'discussionLocked' => true
+      )
+    end
+  end
+end