I noticed during the file system abstraction that this test was
incorrect.
Since both $storagefalse, and $storagetrue are in the same context,
component, area, itemid, and folder, the fact that they had the same
filename meant that they constantly overwrote one another.
As part of archive_to_storage, existing files in the same location are
found, the files themselves deleted, and the existing file record in the
files table is deleted.
The tests continued to pass because:
* the existing variables were not affected by the deletion of the file
record and file so the comparisons were successful; and
* subsequent calls to fetch the content of the file meant that the
files themselves were restored from the trash directory.
0c03db6a32