Update test

ui/appui-react/src/test/toolbar/ToolbarItemUtilities.test.tsx

@@ -6,15 +6,19 @@ import * as React from "react";
 import { Tool } from "@itwin/core-frontend";
 import { ToolbarItemUtilities } from "../../appui-react.js";
 import { ToolUtilities } from "@itwin/imodel-components-react";
+import { render } from "@testing-library/react";
 
 describe("ToolbarItemUtilities.createForTool", () => {
   it("should read `iconElement` property", () => {
     class MyTool extends Tool {
       public static override iconSpec = "icon-placeholder";
     }
     ToolUtilities.defineIcon(MyTool, <span>My SVG</span>);
+
     const item = ToolbarItemUtilities.createForTool(MyTool);
     expect(item.icon).toEqual("icon-placeholder");
-    expect(item).toHaveProperty("iconNode");
+
+    const { getByText } = render(item.iconNode);
+    getByText("My SVG");
   });
 });