Folder 0 (the root folder) is a valid, though nonsensical selection:
using it as a positive option is the same as not using the option at
all, and using it as a negative option necessarily yields an empty set.
However, it can in some contexts be validly specified, and so it should
be handled consistently. It had not been previously, but is now.
Tokens are similar to sessions in that they stand in for users, but the
protocol handlers will manage them; Fever login hashes are the
originating use case for them. These must never expire, for example,
and we need to specify their values.
This commit also performs a bit of database clean-up
Reasons for failures included an unhandled error code, erroneous sorting
assumptions, and a broken computation of the next insert ID in tests
Five failures remain.
This involved changes to the driver interface as well as the database
schemata. The most significantly altered queries were for article
selection and marking, which relied upon unusual features of SQLite.
Overall query efficiency should not be adversely affected (it may have
even imprved) in the common case, while very rare cases (not presently
triggered by any REST handlers) require more queries.
One notable benefit of these changes is that functions which query
articles can now have complete control over which columns are returned.
This has not, however, been implemented yet: symbolic column groups are
still used for now.
Note that PostgreSQL still fails many tests, but the test suite runs to
completion. Note also that one line of the Database class is not
covered; later changes will eventually make it easier to cover the line
in question.
