Re: Python/pytest test framework take two

On Wed, 19 Aug 2026 at 10:59, Jelte Fennema-Nio <me(at)jeltef(dot)nl> wrote:
> The patches in the patchset have detailed commit messages. But here's a
> short summary per patch:
> 0001: Small patch to make meson CI output better in general by not
> truncating error logs as much
> 0002: Small meson refactoring, moving a magic number into a variable
> 0003: Installing 32-bit python, can be removed after pg-vm-images PR is
> merged
> 0004: Basic pytest support for the build system and CI.
> 0005: Introduction of the actual framework that can manage Postgres
> servers and send queries
> 0006-0007: Two short converted tests that run much faster using this
> framework
> 0008: Shows off the background_sql functionality, which is much easier
> to use and more robust than Perl its background_psql
> 0009: Conversion of the 001_aio test, which is the most unreadable Perl
> test I could find (sorry Andres). It becomes, less buggy, more
> readable (imo), shorter and faster when written in Python.
> 0010-0012: Some more tests that are faster and/or easier to read+write
> in Python.

Attached is an updated version of the patchset that rebases and makes
the following changes:

- Much shorter failure output: --tb=short, only the last 30 server log
lines, pg_ctl --silent, framework internals hidden from tracebacks,
and a clearer error for unconsumed background query results. CI's
--max-lines is lowered to 500.
- Uncaught server errors show DETAIL, HINT, QUERY, CONTEXT and LOCATION.
- log_contains() can wait for a line and accepts a list of patterns.
- New require_extension() and friends, like Perl's check_extension().
- Server config, environment and locale now match the Perl TAP tests
(wal_level = minimal by default, TEMP_CONFIG,
PG_TEST_INITDB_EXTRA_OPTS, etc.).
- log_line_prefix includes the backend type.
- POC ports use log_contains(..., wait=True), and 049_wait_for_lsn and
031_recovery_conflict are rebased onto upstream changes.