Fix toggle column action in the discover page (#8905)

* Update DocViewerTab if columns is changed
* Add unit test for DocViewerTab prop 'columns' changed
* Add changeset file
* Changeset file for PR #8905 created/updated
* Use the new license header

---------

Signed-off-by: Tony Lee <[email protected]>
Co-authored-by: opensearch-changeset-bot[bot] <154024398+opensearch-changeset-bot[bot]@users.noreply.github.com>
Co-authored-by: Miki <[email protected]>

changelogs/fragments/8905.yml

@@ -0,0 +1,2 @@
+fix:
+- Fix toggle column action in the discover page ([#8905](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/8905))

src/plugins/discover/public/application/components/doc_viewer/doc_viewer_tab.test.tsx

@@ -0,0 +1,34 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import React from 'react';
+import { mount } from 'enzyme';
+import { DocViewerTab, DocViewerTabProps } from './doc_viewer_tab';
+import { DocViewRenderProps } from '../../doc_views/doc_views_types';
+
+test('DocViewerTab updated when getting new renderProps', () => {
+  const MockComp = ({ columns }: DocViewRenderProps) => (
+    <div data-test-subj="test-div">{columns![0]}</div>
+  );
+
+  const mockProps: DocViewerTabProps = {
+    id: 1,
+    title: 'Test1',
+    component: MockComp,
+    renderProps: {
+      hit: { _id: '1' },
+      columns: ['test1'],
+    },
+  };
+
+  const wrapper = mount(<DocViewerTab {...mockProps} />);
+
+  const div = wrapper.find({ 'data-test-subj': 'test-div' });
+  expect(div.text()).toEqual('test1');
+
+  mockProps.renderProps = { hit: { _id: '1' }, columns: ['test2'] };
+  wrapper.setProps(mockProps);
+  expect(div.text()).toEqual('test2');
+});

src/plugins/discover/public/application/components/doc_viewer/doc_viewer_tab.tsx

@@ -65,6 +65,7 @@ export class DocViewerTab extends React.Component<Props, State> {
   shouldComponentUpdate(nextProps: Props, nextState: State) {
     return (
       nextProps.renderProps.hit._id !== this.props.renderProps.hit._id ||
+      nextProps.renderProps.columns !== this.props.renderProps.columns ||
       nextProps.id !== this.props.id ||
       nextState.hasError
     );