Re: pgsql: Add basic TAP tests for psql's tab-completion logic.

Re: Tom Lane 2020-01-02 
> Add basic TAP tests for psql's tab-completion logic.

The \DRD test fails on Debian/unstable:

# check case-sensitive keyword replacement
# XXX the output here might vary across readline versions
check_completion(
    "\\DRD\t",
    "\\DRD\b\b\bdrds ",
    "complete \\DRD to \\drds");


00:58:02 rm -rf '/<>/build/src/bin/psql'/tmp_check
00:58:02 /bin/mkdir -p '/<>/build/src/bin/psql'/tmp_check
00:58:02 cd /<>/build/../src/bin/psql && TESTDIR='/<>/build/src/bin/psql' PATH="/<>/build/tmp_install/usr/lib/postgresql/13/bin:$PATH" LD_LIBRARY_PATH="/<>/build/tmp_install/usr/lib/x86_64-linux-gnu"  PGPORT='65432' PG_REGRESS='/<>/build/src/bin/psql/../../../src/test/regress/pg_regress' REGRESS_SHLIB='/<>/build/src/test/regress/regress.so' /usr/bin/prove -I /<>/build/../src/test/perl/ -I /<>/build/../src/bin/psql  t/*.pl
00:58:09
00:58:09 #   Failed test 'complete \DRD to \drds'
00:58:09 #   at t/010_tab_completion.pl line 64.
00:58:09 # Looks like you failed 1 test of 12.
00:58:09 t/010_tab_completion.pl ..
00:58:09 Dubious, test returned 1 (wstat 256, 0x100)
00:58:09 Failed 1/12 subtests
00:58:09
00:58:09 Test Summary Report
00:58:09 -------------------
00:58:09 t/010_tab_completion.pl (Wstat: 256 Tests: 12 Failed: 1)
00:58:09   Failed test:  11
00:58:09   Non-zero exit status: 1
00:58:09 Files=1, Tests=12,  7 wallclock secs ( 0.01 usr  0.01 sys +  0.77 cusr  0.23 csys =  1.02 CPU)
00:58:09 Result: FAIL
00:58:09 make[2]: *** [Makefile:87: check] Error 1

https://pgdgbuild.dus.dg-i.net/job/postgresql-13-binaries/architecture=amd64,distribution=sid/444/console


Shouldn't this print some "expected foo, got bar" diagnostics instead
of just dying?

Christoph