1 files changed, 80 insertions, 0 deletions
diff --git a/spec/requests/api/graphql/mutations/incident_management/timeline_event/update_spec.rb b/spec/requests/api/graphql/mutations/incident_management/timeline_event/update_spec.rb
new file mode 100644
index 00000000000..1c4439cec6f
--- /dev/null
+++ b/spec/requests/api/graphql/mutations/incident_management/timeline_event/update_spec.rb
@@ -0,0 +1,80 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe 'Updating an incident timeline event' do
+  include GraphqlHelpers
+
+  let_it_be(:user) { create(:user) }
+  let_it_be(:project) { create(:project) }
+  let_it_be(:incident) { create(:incident, project: project) }
+  let_it_be_with_reload(:timeline_event) do
+    create(:incident_management_timeline_event, incident: incident, project: project)
+  end
+
+  let(:occurred_at) { 1.minute.ago.iso8601 }
+
+  let(:variables) do
+    {
+      id: timeline_event.to_global_id.to_s,
+      note: 'Updated note',
+      occurred_at: occurred_at
+    }
+  end
+
+  let(:mutation) do
+    graphql_mutation(:timeline_event_update, variables) do
+      <<~QL
+        clientMutationId
+        errors
+        timelineEvent {
+          id
+          author { id username }
+          updatedByUser { id username }
+          incident { id title }
+          note
+          noteHtml
+          occurredAt
+          createdAt
+          updatedAt
+        }
+      QL
+    end
+  end
+
+  let(:mutation_response) { graphql_mutation_response(:timeline_event_update) }
+
+  before do
+    project.add_developer(user)
+  end
+
+  it 'updates the timeline event', :aggregate_failures do
+    post_graphql_mutation(mutation, current_user: user)
+
+    timeline_event_response = mutation_response['timelineEvent']
+
+    timeline_event.reload
+
+    expect(response).to have_gitlab_http_status(:success)
+    expect(timeline_event_response).to include(
+      'id' => timeline_event.to_global_id.to_s,
+      'author' => {
+        'id' => timeline_event.author.to_global_id.to_s,
+        'username' => timeline_event.author.username
+      },
+      'updatedByUser' => {
+        'id' => user.to_global_id.to_s,
+        'username' => user.username
+      },
+      'incident' => {
+        'id' => incident.to_global_id.to_s,
+        'title' => incident.title
+      },
+      'note' => 'Updated note',
+      'noteHtml' => timeline_event.note_html,
+      'occurredAt' => occurred_at,
+      'createdAt' => timeline_event.created_at.iso8601,
+      'updatedAt' => timeline_event.updated_at.iso8601
+    )
+  end
+end