Fix more portability issues in new pgbench TAP tests.

* Remove no-such-user test case, output isn't stable, and we really
don't need to be testing such cases here anyway.

* Fix the process exit code test logic to match PostgresNode::psql
(but I didn't bother with looking at the "core" flag).

* Give up on inf/nan tests.

Per buildfarm.

src/bin/pgbench/t/001_pgbench_with_server.pl

@@ -68,14 +68,6 @@ pgbench(
 		qr{FATAL:  database "no-such-database" does not exist} ],
 	'no such database');
 
-pgbench(
-	'-U no-such-user template0',
-	1,
-	[qr{^$}],
-	[   qr{connection to database "template0" failed},
-		qr{FATAL:  role "no-such-user" does not exist} ],
-	'no such user');
-
 pgbench(
 	'-S -t 1', 1, [qr{^$}],
 	[qr{Perhaps you need to do initialization}],
@@ -217,10 +209,7 @@ pgbench(
 		qr{command=18.: double 18\b},
 		qr{command=19.: double 19\b},
 		qr{command=20.: double 20\b},
-		qr{command=21.: double -?nan}i,
-		qr{command=22.: double inf}i,
-		qr{command=23.: double -inf}i,
-		qr{command=24.: int 9223372036854775807\b}, ],
+		qr{command=21.: int 9223372036854775807\b}, ],
 	'pgbench expressions',
 	{   '001_pgbench_expressions' => q{-- integer functions
 \set i1 debug(random(1, 100))
@@ -246,10 +235,7 @@ pgbench(
 \set d6 debug((0.5 * 12.1 - 0.05) * (31.0 / 10))
 \set d7 debug(11.1 + 7.9)
 \set d8 debug(:foo * -2)
--- special values
-\set nan debug(0.0 / 0.0)
-\set pin debug(1.0 / 0.0)
-\set nin debug(-1.0 / 0.0)
+-- forced overflow
 \set maxint debug(:minint - 1)
 -- reset a variable
 \set i1 0

src/test/perl/TestLib.pm

@@ -340,20 +340,22 @@ sub command_fails_like
 # - test_name: name of test
 sub command_checks_all
 {
-	my ($cmd, $ret, $out, $err, $test_name) = @_;
+	my ($cmd, $expected_ret, $out, $err, $test_name) = @_;
 
 	# run command
 	my ($stdout, $stderr);
 	print("# Running: " . join(" ", @{$cmd}) . "\n");
 	IPC::Run::run($cmd, '>', \$stdout, '2>', \$stderr);
 
-	# On Windows, the exit status of the process is returned directly as the
-	# process's exit code, while on Unix, it's returned in the high bits
-	# of the exit code.
-	my $status = $windows_os ? $? : $? >> 8;
+	# See http://perldoc.perl.org/perlvar.html#%24CHILD_ERROR
+	my $ret = $?;
+	die "command exited with signal " . ($ret & 127)
+	  if $ret & 127;
+	$ret = $ret >> 8;
 
 	# check status
-	ok($ret == $status, "$test_name status (got $status vs expected $ret)");
+	ok($ret == $expected_ret,
+		"$test_name status (got $ret vs expected $expected_ret)");
 
 	# check stdout
 	for my $re (@$out)