Added unit tests

Signed-off-by: saimedhi <[email protected]>

public/pages/workflow_detail/resizable_workspace.test.tsx

@@ -0,0 +1,41 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import React from 'react';
+import { render } from '@testing-library/react';
+import { Provider } from 'react-redux';
+import { BrowserRouter as Router, Route, Switch } from 'react-router-dom';
+import { store } from '../../store';
+import { ResizableWorkspace } from './resizable_workspace';
+global.ResizeObserver = class {
+  observe() {}
+  unobserve() {}
+  disconnect() {}
+};
+jest.mock('../../services', () => {
+  const { mockCoreServices } = require('../../../test');
+  return {
+    ...jest.requireActual('../../services'),
+    ...mockCoreServices,
+  };
+});
+
+const renderWithRouter = () =>
+  render(
+    <Provider store={store}>
+      <Router>
+        <Switch>
+          <Route render={() => <ResizableWorkspace workflow={jest.fn()} />} />
+        </Switch>
+      </Router>
+    </Provider>
+  );
+
+describe('ResizableWorkspace', () => {
+  test('renders the page', () => {
+    const { getAllByText } = renderWithRouter();
+    expect(getAllByText('Manage existing workflows').length).toBeGreaterThan(0);
+  });
+});

public/pages/workflow_detail/resizable_workspace.tsx

@@ -4,7 +4,6 @@
  */
 
 import React, { useRef, useState, useEffect } from 'react';
-import { useSelector } from 'react-redux';
 import { Form, Formik } from 'formik';
 import * as yup from 'yup';
 import {