Retry: Rename all test files from JS -> ES6

test/javascripts/helpers/widget-test.js

@@ -0,0 +1,9 @@
+import componentTest from "helpers/component-test";
+
+export function moduleForWidget(name) {
+  moduleForComponent(name, `widget:${name}`, { integration: true });
+}
+
+export function widgetTest(name, opts) {
+  return componentTest(name, opts);
+}