In this episode we discuss these aspects of unit testing:

jUnit, TestNG feature overview
Mocha and Chai: bdd and tdd styles
Cobertura and Istanbul, nyc
Cucumber, Feature Files and verbosity
Introducing Cucumber to teams
Spock
End-to-end testing / integration testing tools: Selenium, Appium
End-to-end API testing: Postman
Contract Tests: Pact, Spring Cloud Contract
Smoke Tests, testing in production and reverting on failure.
Mocking Tools: JMockit, Mockito and PowerMock, Wiremock
Your acceptance tests are next layers integration tests.