Move Perl test modules to a better namespace

The five modules in our TAP test framework all had names in the top
level namespace. This is unwise because, even though we're not
exporting them to CPAN, the names can leak, for example if they are
exported by the RPM build process. We therefore move the modules to the
PostgreSQL::Test namespace. In the process PostgresNode is renamed to
Cluster, and TestLib is renamed to Utils. PostgresVersion becomes simply
PostgreSQL::Version, to avoid possible confusion about what it's the
version of.

Discussion: https://postgr.es/m/aede93a4-7d92-ef26-398f-5094944c2504@dunslane.net

Reviewed by Erik Rijkers and Michael Paquier

Author: adunstan

contrib/amcheck/t/001_verify_heapam.pl

@@ -4,8 +4,8 @@
 use strict;
 use warnings;
 
-use PostgresNode;
-use TestLib;
+use PostgreSQL::Test::Cluster;
+use PostgreSQL::Test::Utils;
 
 use Fcntl qw(:seek);
 use Test::More tests => 272;
@@ -15,7 +15,7 @@
 #
 # Test set-up
 #
-$node = PostgresNode->new('test');
+$node = PostgreSQL::Test::Cluster->new('test');
 $node->init;
 $node->append_conf('postgresql.conf', 'autovacuum=off');
 $node->start;

contrib/amcheck/t/002_cic.pl

@@ -6,8 +6,8 @@
 use warnings;
 
 use Config;
-use PostgresNode;
-use TestLib;
+use PostgreSQL::Test::Cluster;
+use PostgreSQL::Test::Utils;
 
 use Test::More tests => 4;
 
@@ -16,7 +16,7 @@
 #
 # Test set-up
 #
-$node = PostgresNode->new('CIC_test');
+$node = PostgreSQL::Test::Cluster->new('CIC_test');
 $node->init;
 $node->append_conf('postgresql.conf', 'lock_timeout = 180000');
 $node->start;

contrib/amcheck/t/003_cic_2pc.pl

@@ -6,8 +6,8 @@
 use warnings;
 
 use Config;
-use PostgresNode;
-use TestLib;
+use PostgreSQL::Test::Cluster;
+use PostgreSQL::Test::Utils;
 
 use Test::More tests => 6;
 
@@ -16,7 +16,7 @@
 #
 # Test set-up
 #
-$node = PostgresNode->new('CIC_2PC_test');
+$node = PostgreSQL::Test::Cluster->new('CIC_2PC_test');
 $node->init;
 $node->append_conf('postgresql.conf', 'max_prepared_transactions = 10');
 $node->append_conf('postgresql.conf', 'lock_timeout = 180000');

contrib/auto_explain/t/001_auto_explain.pl

@@ -4,11 +4,11 @@
 use strict;
 use warnings;
 
-use PostgresNode;
-use TestLib;
+use PostgreSQL::Test::Cluster;
+use PostgreSQL::Test::Utils;
 use Test::More tests => 4;
 
-my $node = PostgresNode->new('main');
+my $node = PostgreSQL::Test::Cluster->new('main');
 $node->init;
 $node->append_conf('postgresql.conf',
 	"shared_preload_libraries = 'auto_explain'");

contrib/bloom/t/001_wal.pl

@@ -4,8 +4,8 @@
 # Test generic xlog record work for bloom index replication.
 use strict;
 use warnings;
-use PostgresNode;
-use TestLib;
+use PostgreSQL::Test::Cluster;
+use PostgreSQL::Test::Utils;
 use Test::More tests => 31;
 
 my $node_primary;
@@ -41,7 +41,7 @@ sub test_index_replay
 }
 
 # Initialize primary node
-$node_primary = PostgresNode->new('primary');
+$node_primary = PostgreSQL::Test::Cluster->new('primary');
 $node_primary->init(allows_streaming => 1);
 $node_primary->start;
 my $backup_name = 'my_backup';
@@ -50,7 +50,7 @@ sub test_index_replay
 $node_primary->backup($backup_name);
 
 # Create streaming standby linking to primary
-$node_standby = PostgresNode->new('standby');
+$node_standby = PostgreSQL::Test::Cluster->new('standby');
 $node_standby->init_from_backup($node_primary, $backup_name,
 	has_streaming => 1);
 $node_standby->start;

contrib/oid2name/t/001_basic.pl

@@ -4,7 +4,7 @@
 use strict;
 use warnings;
 
-use TestLib;
+use PostgreSQL::Test::Utils;
 use Test::More tests => 8;
 
 #########################################

contrib/test_decoding/t/001_repl_stats.pl

@@ -6,12 +6,12 @@
 use strict;
 use warnings;
 use File::Path qw(rmtree);
-use PostgresNode;
-use TestLib;
+use PostgreSQL::Test::Cluster;
+use PostgreSQL::Test::Utils;
 use Test::More tests => 2;
 
 # Test set-up
-my $node = PostgresNode->new('test');
+my $node = PostgreSQL::Test::Cluster->new('test');
 $node->init(allows_streaming => 'logical');
 $node->append_conf('postgresql.conf', 'synchronous_commit = on');
 $node->start;

contrib/vacuumlo/t/001_basic.pl

@@ -4,7 +4,7 @@
 use strict;
 use warnings;
 
-use TestLib;
+use PostgreSQL::Test::Utils;
 use Test::More tests => 8;
 
 program_help_ok('vacuumlo');

src/bin/initdb/t/001_initdb.pl

@@ -9,11 +9,11 @@
 use warnings;
 use Fcntl ':mode';
 use File::stat qw{lstat};
-use PostgresNode;
-use TestLib;
+use PostgreSQL::Test::Cluster;
+use PostgreSQL::Test::Utils;
 use Test::More tests => 22;
 
-my $tempdir = TestLib::tempdir;
+my $tempdir = PostgreSQL::Test::Utils::tempdir;
 my $xlogdir = "$tempdir/pgxlog";
 my $datadir = "$tempdir/data";
 

src/bin/pg_amcheck/t/001_basic.pl

@@ -4,7 +4,7 @@
 use strict;
 use warnings;
 
-use TestLib;
+use PostgreSQL::Test::Utils;
 use Test::More tests => 8;
 
 program_help_ok('pg_amcheck');