[TSVB] [Unit] Increase Gauge coverage (#38966)

*  Increase Gauge coverage

src/legacy/core_plugins/metrics/public/components/panel_config/gauge.test.js

@@ -0,0 +1,58 @@
+/*
+ * 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 { shallowWithIntl } from 'test_utils/enzyme_helpers';
+jest.mock('plugins/data/setup', () => ({
+  data: {
+    query: {
+      ui: jest.fn(),
+    },
+  },
+}));
+import { GaugePanelConfig } from './gauge';
+
+describe('GaugePanelConfig', () => {
+  it('call switch tab onChange={handleChange}', () => {
+    const props = {
+      fields: {},
+      model: {},
+      onChange: jest.fn(),
+    };
+    const wrapper = shallowWithIntl(<GaugePanelConfig.WrappedComponent {...props} />);
+
+    wrapper
+      .find('EuiTab')
+      .first()
+      .simulate('onClick');
+    expect(props.onChange).toBeCalled();
+  });
+
+  it('call onChange={handleChange}', () => {
+    const props = {
+      fields: {},
+      model: {},
+      onChange: jest.fn(),
+    };
+    const wrapper = shallowWithIntl(<GaugePanelConfig.WrappedComponent {...props} />);
+
+    wrapper.simulate('onClick');
+    expect(props.onChange).toBeCalled();
+  });
+});

src/legacy/core_plugins/metrics/public/components/vis_types/gauge/series.test.js

@@ -0,0 +1,62 @@
+/*
+ * 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 { GaugeSeries } from './series';
+import { mountWithIntl } from 'test_utils/enzyme_helpers';
+
+jest.mock('plugins/data/setup', () => ({
+  data: {
+    query: {
+      ui: jest.fn(),
+    },
+  },
+}));
+
+const defaultProps = {
+  disableAdd: true,
+  disableDelete: true,
+  dragHandleProps: {},
+  toggleVisible: jest.fn(),
+  onAdd: jest.fn(),
+  onChange: jest.fn(),
+  onClone: jest.fn(),
+  onDelete: jest.fn(),
+};
+
+it('should disable add data', () => {
+  const wrapper = mountWithIntl(<GaugeSeries {...defaultProps} />);
+  const props = wrapper.props();
+
+  expect(props.disableAdd).toBeTruthy();
+});
+
+it('should disable delete data', () => {
+  const wrapper = mountWithIntl(<GaugeSeries {...defaultProps} />);
+  const props = wrapper.props();
+  expect(props.disableDelete).toBeTruthy();
+});
+
+it('should call toggleVisible function', () => {
+  const wrapper = mountWithIntl(<GaugeSeries {...defaultProps} />);
+  wrapper
+    .find('EuiButtonIcon')
+    .at(0)
+    .simulate('click');
+  expect(defaultProps.toggleVisible).toBeCalled();
+});