Added post list tests for blog profile page

__mocks__/modules/gatsby-plugin-google-analytics.js

@@ -0,0 +1,15 @@
+import React from 'react'
+import {onLinkClick} from 'gatsby-plugin-google-analytics';
+
+afterEach(() => {
+  onLinkClick.mockReset();
+})
+
+jest.mock('gatsby-plugin-google-analytics', () => {
+  const onLinkClick = jest.fn();
+
+  return {
+    OutboundLink: (props) => <div onClick={onLinkClick}>{props.children}</div>,
+    onLinkClick
+  }
+});