At the moment, if you want to write unit tests for Cloud components, you have to extend AbstractDistribZkTestCase, which has a number of disadvantages:
- the API isn't well-documented
- you get a default configuration loaded into ZK, and it's not trivial to add separate ones
- you get a default collection, whether you want one or not
- the test cluster isn't static, which means that it's started up and shutdown after every test function. To avoid tests being incredibly slow, we end up writing single-function tests that call out to sub-functions, losing the benefits of execution-order randomization.
It would be more useful to have a properly configurable and documented testcase base class.