eCommerce WebSite Test

The test approch should be
1) GUI Testing
2) Smoke testing
3) Functional Testing, security testing etc.
4) Retesting and  Regresstion testing'
5) Confirmation Testing
6) UAT

In  case of online e Commerce Site, first of all find out  the positive and negative scenarios. According to the scenarios write down the test cases consideration with the test types.

Please let me know if I am wrong anywhere.

First, check all links, form's validation with negative testing, allignment of button with their respective fields, browsers compatibility and after login internal link should not open in another browser or in another URL. Spelling and fonts size on whole page should be same or not.

Best Regards,
Vaibhav