Late answer but could be useful for someone stumbling upon this question.
To automate some integration tests for Talend ESB, one could use Spindev solution that allows to create, run and analyze data flow tests through the ESB.
You can gather more information about our product at https://spindev.io/product/
Hope this helps,
Talend named a Leader.
Kickstart your first data integration and ETL projects.
Watch the recorded webinar!
Take a look at this technical overview video of Talend API Designer
Find out how to get started with APIs