Add data-test-subj

x-pack/legacy/plugins/lens/public/editor_frame_plugin/embeddable/expression_wrapper.tsx

@@ -50,7 +50,7 @@ export function ExpressionWrapper({
             padding="m"
             expression={expression}
             searchContext={{ ...context, type: 'kibana_context' }}
-            renderError={error => <div>{error}</div>}
+            renderError={error => <div data-test-subj="expression-renderer-error">{error}</div>}
           />
         </div>
       )}