title: When to do E2E Testing
body: <p>I am working in a project (angular and spring boot) and we do UnitTests and Integration tests. I am a little confused about E2E testing. When should I use E2E testing, what advantages could e2e Test bring to me. </p>
  
  <p>When UnitTest suffices, when  I sould use E2E Test. </p>
  
  <p>This is a general question and it does not releate to a specific technology</p>