Add test coverage for pg_current_logfile() function.
There has been no coverage at all up to now.  Given Thomas Kellerer's
recent report, I suspect this may fail on (some?) Windows machines,
but let's find out.
Discussion:
@@ -3,7 +3,7 @@ use warnings;
use PostgresNode;
use TestLib;
-use Test::More tests => 4;
+use Test::More tests => 5;
use Time::HiRes qw(usleep);
# Set up node with logging collector
@@ -47,6 +47,10 @@ for (my $attempts = 0; $attempts < $max_attempts; $attempts++)
like($first_logfile, qr/division by zero/, 'found expected log file content');
+# While we're at it, test pg_current_logfile() function
+is($node->safe_psql('postgres', "SELECT pg_current_logfile('stderr')"),
+ $lfname, 'pg_current_logfile() gives correct answer');
+
# Sleep 2 seconds and ask for log rotation; this should result in
# output into a different log file name.
sleep(2);
