tree 1773862910ac88b780c675d4b135e7094aaf369f
parent d99be5e5cd81a6a47f7ec474ed75b60c75844648
author Youssef Elghareeb <ghareeb@google.com> 1612783167 +0100
committer Youssef Elghareeb <ghareeb@google.com> 1612789698 +0100

Fix FilesInCommitCollection when parent = 0

Change Ia3a97599f8 refactored FileInfoJson to have two implementations:
the current one, and another using the new diff cache redesign. The
previous refactoring also modified FilesInCommitCollection to use the
new FileInfoJson API.

The previous implementation allowed passing a value '0' for parentNum to
FilesInCommitCollection, which was not handled in this refactoring. This
change fixes this case in FileInfoJsonOldImpl and adds tests for
FilesInCommitCollection.

Passing a value '0' was not mentioned in the docs, although it was
handled in the code. I modified the docs to include this case.

Change-Id: I65d505e574acbaf64c68f5cc7ec622ae3f2ab923