ZK is a Java framework. Technically you could use any Java test tools you prefer. Here we describe the testing tips and ZTL (the official test tool based on Selenium).
For information of particular test tools, please refer to small talks:
- Sahi: Making ZK Functional Tests With Sahi
- Selenium: How to Test ZK Application with Selenium and ZK Unit Testing
- zunit: ZK Unit Testing Project - zunit