fix: Header Component - Replaced class by func. comp (#142)

* refactor: replaced class by func.comp

* refactor: replacing jest test by react-testing-library

* refactor: added test todos

* feat: added more unit tests

* fix: fixed tooltip import

* fix: fixed test

* fix: fixed typo

* fix: fixed imports

src/components/Header/HeaderToolTip.tsx

@@ -0,0 +1,18 @@
+import React from 'react';
+import Tooltip from '@material-ui/core/Tooltip';
+
+import HeaderToolTipIcon, { TooltipIconType } from './HeaderToolTipIcon';
+
+interface Props {
+  title: string;
+  tooltipIconType: TooltipIconType;
+  onClick?: () => void;
+}
+
+const HeaderToolTip: React.FC<Props> = ({ tooltipIconType, title, onClick }) => (
+  <Tooltip disableFocusListener={true} title={title}>
+    <HeaderToolTipIcon onClick={onClick} tooltipIconType={tooltipIconType} />
+  </Tooltip>
+);
+
+export default HeaderToolTip;