make boilder plate react test happy with new dependencies

package.json

@@ -30,7 +30,7 @@
   },
   "jest": {
     "transformIgnorePatterns": [
-      "node_modules/(?!(three)/)"
+      "node_modules/(?!(three|allotment)/)"
     ]
   },
   "eslintConfig": {

src/App.test.tsx

@@ -1,9 +1,19 @@
-import React from 'react';
-import { render, screen } from '@testing-library/react';
-import App from './App';
+import React from "react";
+import { render, screen } from "@testing-library/react";
+import App from "./App";
 
-test('renders learn react link', () => {
+let listener: ((rect: any) => void) | undefined = undefined;
+(global as any).ResizeObserver = class ResizeObserver {
+  constructor(ls: ((rect: any) => void) | undefined) {
+    listener = ls;
+  }
+  observe() {}
+  unobserve() {}
+  disconnect() {}
+};
+
+test("renders learn react link", () => {
   render(<App />);
-  const linkElement = screen.getByText(/learn react/i);
+  const linkElement = screen.getByText(/viewer/i);
   expect(linkElement).toBeInTheDocument();
 });

src/App.tsx

@@ -2,7 +2,7 @@ import React, { useRef, useState, useEffect } from "react";
 import { Canvas } from "@react-three/fiber";
 import { Allotment } from "allotment";
 import { OrbitControls, OrthographicCamera } from "@react-three/drei";
-import "allotment/dist/style.css";
+// import "allotment/dist/style.css";
 import { lexer } from "./lang/tokeniser";
 import { abstractSyntaxTree } from "./lang/abstractSyntaxTree";
 import { executor } from "./lang/executor";

src/index.css

@@ -2,6 +2,8 @@
 @tailwind components;
 @tailwind utilities;
 
+@import '../node_modules/allotment/dist/style.css';
+
 body {
   margin: 0;
   font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',