test(timelineitem.test.js): add test for TimelineItem.tsx

Add test for TimelineItem.tsx

src/Components/timelineItem/TimelineItem.test.js

@@ -1,3 +1,10 @@
-test('true', () => {
-  expect(true).toBe(true);
+import React from 'react';
+import { render } from '@testing-library/react';
+import ReactDOM from 'react-dom';
+import TimelineItem from './TimelineItem';
+
+it('matches snapshot', () => {
+  const container = document.createElement('div');
+  ReactDOM.render(<TimelineItem />, container);
+  expect(container).toMatchSnapshot();
 });

src/Components/timelineItem/__snapshots__/TimelineItem.test.js.snap

@@ -0,0 +1,18 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`matches snapshot 1`] = `
+<div>
+  <div
+    class="sc-bxivhb SUHGw"
+  >
+    <div>
+      <div
+        style="cursor: pointer;"
+      >
+        <h4 />
+        <h5 />
+      </div>
+    </div>
+  </div>
+</div>
+`;