add more test for icon and aggregated view

Signed-off-by: yujin-emma <yujin.emma.work@gmail.com>

CHANGELOG.md

@@ -89,6 +89,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 - [Multiple Datasource] Add empty state component for no connected data source ([#6499](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/6499))
 - [Multiple Datasource] Add popover for empty state and redirect to data source management page([#6514](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/6514))
 - [Multiple Datasource] Update empty state font size and footer button size to small ([6549](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/6549))
+- [Multiple Datasource] Add UT for empty, error icon and aggregated view ([#6729](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/6729))
 - [Workspace] Add APIs to support plugin state in request ([#6303](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/6303))
 - [Workspace] Filter left nav menu items according to the current workspace ([#6234](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/6234))
 - [Multiple Datasource] Add multi data source support to Timeline ([#6385](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/6385))

src/plugins/data_source_management/public/components/custom_database_icon/empty_icon.test.tsx

@@ -0,0 +1,15 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { shallow } from 'enzyme';
+import React from 'react';
+import { EmptyIcon } from './empty_icon';
+
+describe('Test on empty icon', () => {
+  it('should render the component normally', () => {
+    const component = shallow(<EmptyIcon />);
+    expect(component).toMatchSnapshot();
+  });
+});

src/plugins/data_source_management/public/components/custom_database_icon/error_icon.test.tsx

@@ -0,0 +1,15 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { shallow } from 'enzyme';
+import React from 'react';
+import { ErrorIcon } from './error_icon';
+
+describe('Test on empty icon', () => {
+  it('should render the component normally', () => {
+    const component = shallow(<ErrorIcon />);
+    expect(component).toMatchSnapshot();
+  });
+});