Set babel.

src/bootstrap/__tests__/Select.test.js

@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2019 CZ.NIC z.s.p.o. (http://www.nic.cz/)
+ *
+ * This is free software, licensed under the GNU General Public License v3.
+ * See /LICENSE for more information.
+ */
+
+import React from 'react';
+
+import {fireEvent, getByDisplayValue, getByText, render} from 'customTestRender';
+
+import Select from '../components/Select';
+
+const TEST_CHOICES = {
+    '1': 'one',
+    '2': 'two',
+    '3': 'three',
+};
+
+describe('<Select/>', () => {
+    var selectContainer;
+    const onChangeHandler = jest.fn();
+    beforeEach(() => {
+        const {container} = render(
+            <Select
+                label='Test label'
+                value='1'
+                choices={TEST_CHOICES}
+                helpText='Help text'
+
+                onChange={onChangeHandler}
+            />
+        );
+        selectContainer = container;
+    });
+
+    it('Test with snapshot.', () => {
+        expect(selectContainer).toMatchSnapshot();
+    });
+
+    it('Test onChange handling.', () => {
+        const select = getByDisplayValue(selectContainer, 'one');
+        expect(select.value).toBe('1');
+        fireEvent.change(select, {target: {value: '2'}});
+
+        const option = getByText(selectContainer, 'two');
+        expect(onChangeHandler).toBeCalled();
+
+        expect(option.value).toBe('2');
+    })
+});