Add unit test for DocViewerTab prop 'columns' changed

Signed-off-by: Tony Lee <[email protected]>

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

@@ -0,0 +1,59 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ *
+ * Any modifications Copyright OpenSearch Contributors. See
+ * GitHub history for details.
+ */
+
+/*
+ * Licensed to Elasticsearch B.V. under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch B.V. licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+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');
+});