First of all, thanks for your interest in Jamtaba!
Jamtaba coding style is the same Qt Coding Style. If you are using QtCreator as IDE you can use a plugin called Beautifier to format your code applying the Jamtaba coding style. This QtCreator plugin MUST be used with an external tool. Please read the details about how use this plugin and configure the external tool.
In Jamtaba we are using the external tool Uncrustify combined with the Beautifier QtCreator plugin to format the code. You must configure QtCreator to use the uncrustify config file inside the Jamtaba project. In QtCretor go to Tools -> Options -> Beautifier and check the option use file uncrustify.cfg defined in project files.
obs: The file uncrustify.cfg is just a copy of this file.
See the Client/tests folder for some test examples. These tests are using the QtTest framework. This is an easy to use test tool for Qt applications and no additional setup/installing is required. A very good resource to learn how write these tests is the Qt official Test Tutorial