Add linkify tests

client/src/js/util/__tests__/util.test.js

@@ -0,0 +1,56 @@
+import React from 'react';
+import linkify from '../linkify';
+
+describe('linkify()', () => {
+  const proto = href => href.indexOf('http') !== 0 ? `http://${href}` : href;
+  const linkTo = href => <a href={proto(href)} rel="noopener noreferrer" target="_blank">{href}</a>;
+
+  it('returns the arg when no matches are found', () => [
+    null,
+    undefined,
+    10,
+    false,
+    true,
+    'just some text',
+    ''
+  ].forEach(input => expect(linkify(input)).toBe(input)));
+
+  it('linkifies text', () => Object.entries({
+    'google.com': linkTo('google.com'),
+    'google.com stuff': [
+      linkTo('google.com'),
+      ' stuff'
+    ],
+    'cake google.com stuff': [
+      'cake ',
+      linkTo('google.com'),
+      ' stuff'
+    ],
+    'cake google.com stuff https://google.com': [
+      'cake ',
+      linkTo('google.com'),
+      ' stuff ',
+      linkTo('https://google.com')
+    ],
+    'cake google.com stuff pie https://google.com  ': [
+      'cake ',
+      linkTo('google.com'),
+      ' stuff pie ',
+      linkTo('https://google.com'),
+      '  '
+    ],
+    ' google.com': [
+      ' ',
+      linkTo('google.com')
+    ],
+    'google.com ': [
+      linkTo('google.com'),
+      ' '
+    ],
+    '/google.com?': [
+      '/',
+      linkTo('google.com'),
+      '?'
+    ]
+  }).forEach(([ input, expected ]) => expect(linkify(input)).toEqual(expected)));
+});