1 files changed, 51 insertions, 0 deletions
diff --git a/spec/graphql/mutations/incident_management/timeline_event/create_spec.rb b/spec/graphql/mutations/incident_management/timeline_event/create_spec.rb
new file mode 100644
index 00000000000..63faecad5d5
--- /dev/null
+++ b/spec/graphql/mutations/incident_management/timeline_event/create_spec.rb
@@ -0,0 +1,51 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Mutations::IncidentManagement::TimelineEvent::Create do
+  let_it_be(:current_user) { create(:user) }
+  let_it_be(:project) { create(:project) }
+  let_it_be(:incident) { create(:incident, project: project) }
+
+  let(:args) { { note: 'note', occurred_at: Time.current } }
+
+  specify { expect(described_class).to require_graphql_authorizations(:admin_incident_management_timeline_event) }
+
+  describe '#resolve' do
+    subject(:resolve) { mutation_for(project, current_user).resolve(incident_id: incident.to_global_id, **args) }
+
+    context 'when a user has permissions to create a timeline event' do
+      let(:expected_timeline_event) do
+        instance_double(
+          'IncidentManagement::TimelineEvent',
+          note: args[:note],
+          occurred_at: args[:occurred_at].to_s,
+          incident: incident,
+          author: current_user,
+          promoted_from_note: nil
+        )
+      end
+
+      before do
+        project.add_developer(current_user)
+      end
+
+      it_behaves_like 'creating an incident timeline event'
+
+      context 'when TimelineEvents::CreateService responds with an error' do
+        let(:args) { {} }
+
+        it_behaves_like 'responding with an incident timeline errors',
+          errors: ["Occurred at can't be blank, Note can't be blank, and Note html can't be blank"]
+      end
+    end
+
+    it_behaves_like 'failing to create an incident timeline event'
+  end
+
+  private
+
+  def mutation_for(project, user)
+    described_class.new(object: project, context: { current_user: user }, field: nil)
+  end
+end