Navigation bar

src/__test__/NavigationBar.test.js

+import React from 'react'
+import 'jest-styled-components'
+import { NavigationBar } from '../ui'
+import { create, render } from './_helpers'
+
+const menuLink = [{ to: '/', title: 'Item1 ' }, { to: '/', title: 'Item2 ' }]
+
+describe('NavigationBar', () => {
+  test('renders correctly', () => {
+    const tree = create(
+      <NavigationBar brand="NCBI" menuLinks={menuLink} />,
+    ).toJSON()
+
+    expect(tree).toMatchSnapshot()
+  })
+  test('renders list of links correctly', () => {
+    const { queryAllByTestId } = render(
+      <NavigationBar brand="NCBI" menuLinks={menuLink} />,
+    )
+    expect(queryAllByTestId('navigationBarLinkId')).toHaveLength(
+      menuLink.length,
+    )
+  })
+})