tree 66872a8d5b47893d611519b0a469552b2c8fc56a
parent efcbe85cd0e3032f7049812b60aa7e6b5dee1f18
author Alice Kober-Sotzek <aliceks@google.com> 1508504390 +0200
committer Alice Kober-Sotzek <aliceks@google.com> 1508504662 +0200

Fix check for group index in GroupCacheImpl.ByIdLoader

The group index is added to the GroupIndexCollection at some point
during startup. When the constructor of a class is called via Guice,
we cannot be sure that the GroupIndexCollection already has the group
index. This situation becomes obvious when we run our tests: Without
this change, we never lookup the groups from the index in
GroupCacheImpl.ByIdLoader during test execution.

The fix is simple: We test for the existence of the group index right
before we try to access it.

Change-Id: Ic467bb1805d6058a7ae770e81e86ef59df81742a