Adjust cache unit test to be closer to current svn_fs.Repository semantics.  This also now covers the case mentioned in #1358.  Thanks again to Matthew Good for the patch.
Adjust cache unit test to be closer to current svn_fs.Repository semantics.  This also now covers the case mentioned in #1358.  Thanks again to Matthew Good for the patch.

git-svn-id: f68c6b3b1dcd5d00a2560c384475aaef3bc99487@1445 af82e41b-90c4-0310-8c96-b1721e28e2e2

dafrito/trac-mirror,moreati/trac-gitsvn,dokipen/trac,moreati/trac-gitsvn,dokipen/trac,exocad/exotrac,moreati/trac-gitsvn,exocad/exotrac,dafrito/trac-mirror,dafrito/trac-mirror,exocad/exotrac,moreati/trac-gitsvn,exocad/exotrac,dokipen/trac,dafrito/trac-mirror