Integrate proptypes for our shared components.

- Fix unit tests.
- Fix linter errors.

src/components/Tabs/Tab.jsx

@@ -1,4 +1,5 @@
 import React from 'react';
+import PropTypes from 'prop-types';
 import { NavLink } from 'react-router-dom';
 import './tabs.scss';
 
@@ -15,4 +16,18 @@ const Tab = ({ children, link, replace }) => (
   </li>
 );
 
+Tab.propTypes = {
+  children: PropTypes.oneOfType([
+    PropTypes.arrayOf(PropTypes.node),
+    PropTypes.node
+  ]).isRequired,
+  link: PropTypes.string,
+  replace: PropTypes.bool,
+};
+
+Tab.defaultProps = {
+  link: null,
+  replace: false,
+};
+
 export default Tab;

src/components/Tabs/Tabs.jsx

@@ -1,4 +1,5 @@
 import React from 'react';
+import PropTypes from 'prop-types';
 import { Link } from 'react-router-dom';
 import { Button } from '@patternfly/react-core';
 import { TimesIcon } from '@patternfly/react-icons';
@@ -35,4 +36,21 @@ const Tabs = ({ children, labelText, closeButton }) => (
   </div>
 );
 
+Tabs.propTypes = {
+  children: PropTypes.oneOfType([
+    PropTypes.arrayOf(PropTypes.node),
+    PropTypes.node
+  ]).isRequired,
+  labelText: PropTypes.string,
+  closeButton: PropTypes.shape({
+    text: PropTypes.string,
+    link: PropTypes.string,
+  }),
+};
+
+Tabs.defaultProps = {
+  labelText: null,
+  closeButton: null,
+};
+
 export default Tabs;