Set babel.

src/bootstrap/__tests__/Button.test.js

@@ -0,0 +1,29 @@
+/*
+ * 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 {render} from 'customTestRender';
+
+import Button from '../components/Button'
+
+describe('<Button />', () => {
+    it('Render button correctly', () => {
+        const {container} = render(<Button>Test Button</Button>);
+        expect(container.firstChild).toMatchSnapshot()
+    });
+
+    it('Render button with custom classes', () => {
+        const {container} = render(<Button className="one two three">Test Button</Button>)
+        expect(container.firstChild).toMatchSnapshot()
+    });
+
+    it('Render button with spinner', () => {
+        const {container} = render(<Button loading={true}>Test Button</Button>)
+        expect(container.firstChild).toMatchSnapshot()
+    });
+});