Recently, PHPUnit (all versions) did some changes about how the
comparators worked and this has caused some float comparisons
to stop working.
We need to move them to assertEqualsWithDelta(), allowing a small
tolerance to workaround the floats comparison problem.
0.00001 has been decided. And applied to all the similar assertions
within the unittest function, so if more cases are added to them
better be copied with the agreed tolerance.
This issue greatly improves the performance of displaying statistics in
the question bank.
1. The required quiz statistics are now pre-computed by a scheduled task.
2. Cached statistics in the database are now never cleaned up, so the
pre-computed stats are always available.
3. The way the cached statistics are loaded for each question
that is being displayed is now a bit more efficient.
4. Related to that, there is a new callback which activities can implement,
if they want their question statistics to be included in the ones shown
in the question bank.
Note, there is still further improvement possible to load the statistics
for all questions being displayed in bulk. However, that must wait for a
future issue, MDL-75576. The other improvements in this issue are
significant and we did not want to delay releasing them.
Co-authored-by: Jonathan Champ <jrchamp@ncsu.edu>
Co-authored-by: Tim Hunt <t.j.hunt@open.ac.uk>
The cache file is only ever written to in the `write_file` function,
where it does so by writing to a temp file and performing an atomic
rename of that file. When writing, the target file is never locked.
The cache file is only ever read in the `get` function, and there is no
need for an exclusive lock in that situation.
There is therefore no need to obtain any lock, shared or exclusive, to
read the cache file. Doing so only affects performance of the file sytem
as file locks must be needlessly obtained and written to disk for a read
operation which does not benefit from them.
- Guest user attempting to access to single-activity course.
- Not enrolled user attempt to access to single-activity course.
Both should, by default, land to the "cannot access/enrol" page.
The Redis cache store and session handler both do a 'ping()' after
connecting to Redis. This is unnecessary because the connect() call
has just checked the network connection and it's hardly likely that
the server has gone down since then.
According to my profiling, both connect() and ping() take
measurable time when talking to a separate server, i.e. a few
milliseconds. So it's not the case that connect() doesn't really
talk to the server, as I initially wondered.
If using Redis on a separate (non-localhost) server for both session
and cache store, removing these ping calls can save a millisecond
or two per request.
Applied the following changes to various testcase classes:
- Namespaced with component[\level2-API]
- Moved to level2-API subdirectory when required.
- Fixed incorrect use statements with leading backslash.
- Remove file phpdoc block
- Remove MOODLE_INTERNAL if not needed.
- Changed code to point to global scope when needed.
- Fix some relative paths and comments here and there.
- All them passing individually.
- Complete runs passing too.
Special mention to:
- In lib/tests/blocklib_test.php 2 helper classes have been
moved to tests/fixtures, because they needed to be namespace-free.
