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Quite a few of our built-in system views were not exercised anywhere in the regression tests. This is perhaps not so exciting for the ones that are simple projections/joins of system catalogs, but for the ones that are wrappers for set-returning C functions, the omission translates directly to lack of test coverage for those functions. In many cases, the reason for the omission is that the view doesn't have much to do with any specific SQL feature, so there's no natural place to test it. To remedy that, invent a new script sysviews.sql that's dedicated to testing SRF-based views. Move a couple of tests that did fit this charter into the new script, and add simple "count(*)" based tests of other views within the charter. That's enough to ensure we at least exercise the main code path through the SRF, although it does little to prove that the output is sane. More could be done here, no doubt, and I hope someone will think about how we can test these views more thoroughly. But this is a starting point. Discussion: https://postgr.es/m/19359.1485723741@sss.pgh.pa.us
PostgreSQL tests ================ This directory contains a variety of test infrastructure as well as some of the tests in PostgreSQL. Not all tests are here -- in particular, there are more in individual contrib/ modules and in src/bin. Not all these tests get run by "make check". Check src/test/Makefile to see which tests get run automatically. examples/ Demonstration programs for libpq that double as regression tests via "make check" isolation/ Tests for concurrent behavior at the SQL level locale/ Sanity checks for locale data, encodings, etc mb/ Tests for multibyte encoding (UTF-8) support modules/ Extensions used only or mainly for test purposes, generally not suitable for installing in production databases perl/ Infrastructure for Perl-based TAP tests recovery/ Test suite for recovery and replication regress/ PostgreSQL's main regression test suite, pg_regress ssl/ Tests to exercise and verify SSL certificate handling subscription/ Tests for logical replication thread/ A thread-safety-testing utility used by configure