Add more tests for commit_timestamp feature

These tests verify that 1) WAL replay preserves the stored value,
2) a streaming standby server replays the value obtained from the
master, and 3) the behavior is sensible in the face of repeated
configuration changes.

One annoyance is that tmp_check/ subdir from the TAP tests is clobbered
when the pg_regress test runs in the same subdirectory.  This is
bothersome but not too terrible a problem, since the pg_regress test is
not run anyway if the TAP tests fail (unless "make -k" is used).

I had these tests around since commit 69e7235c93e2; add them now that we
have the recovery test framework in place.

1 files changed, 55 insertions, 0 deletions

diff --git a/src/test/modules/commit_ts/t/002_standby.pl b/src/test/modules/commit_ts/t/002_standby.pl
new file mode 100644
index 00000000000..5cc2501c36c
--- /dev/null
+++ b/src/test/modules/commit_ts/t/002_standby.pl
@@ -0,0 +1,55 @@
+# Test simple scenario involving a standby
+
+use strict;
+use warnings;
+
+use TestLib;
+use Test::More tests => 2;
+use PostgresNode;
+
+my $bkplabel = 'backup';
+my $master = get_new_node('master');
+$master->init(allows_streaming => 1);
+
+$master->append_conf('postgresql.conf', qq{
+	track_commit_timestamp = on
+	max_wal_senders = 5
+	wal_level = hot_standby
+	});
+$master->start;
+$master->backup($bkplabel);
+
+my $standby = get_new_node('standby');
+$standby->init_from_backup($master, $bkplabel, has_streaming => 1);
+$standby->start;
+
+for my $i (1 .. 10)
+{
+	$master->psql('postgres', "create table t$i()");
+}
+my $master_ts = $master->psql('postgres',
+	qq{SELECT ts.* FROM pg_class, pg_xact_commit_timestamp(xmin) AS ts WHERE relname = 't10'});
+my $master_lsn = $master->psql('postgres',
+	'select pg_current_xlog_location()');
+$standby->poll_query_until('postgres',
+	qq{SELECT '$master_lsn'::pg_lsn <= pg_last_xlog_replay_location()})
+	or die "slave never caught up";
+
+my $standby_ts = $standby->psql('postgres',
+	qq{select ts.* from pg_class, pg_xact_commit_timestamp(xmin) ts where relname = 't10'});
+is($master_ts, $standby_ts, "standby gives same value as master");
+
+$master->append_conf('postgresql.conf', 'track_commit_timestamp = off');
+$master->restart;
+$master->psql('postgres', 'checkpoint');
+$master_lsn = $master->psql('postgres',
+	'select pg_current_xlog_location()');
+$standby->poll_query_until('postgres',
+	qq{SELECT '$master_lsn'::pg_lsn <= pg_last_xlog_replay_location()})
+	or die "slave never caught up";
+$standby->psql('postgres', 'checkpoint');
+
+# This one should raise an error now
+$standby_ts = $standby->psql('postgres',
+	'select ts.* from pg_class, pg_xact_commit_timestamp(xmin) ts where relname = \'t10\'');
+is($standby_ts, '', "standby gives no value when master turned feature off");