Seems that the usual way how jobs work on hudson is that there is one job for
building a project and then if I want to have a subsequent job to run all unit
tests, that job needs to download artifacts produced by that build job from
Hudson. As a consequence, people usually add separate targets to their build
scripts for running unit tests from hudson which download the build artifacts
from the network.
I think it would be nice if things could work the way how users would do it when
running tests locally - i.e. use usual targets for building and then simply run
a target for unit tests in the same workspace. This could be achieved by
providing the subsequent jobs an exact snapshot of the workspace at the time
when the parent job finished running.