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Add wait_for_subscription_sync for TAP tests.

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The TAP tests for logical replication in src/test/subscription are using
the following code in many places to make sure that the subscription is
synchronized with the publisher:

  $node_publisher->wait_for_catchup('tap_sub');
  $node_subscriber->poll_query_until('postgres',
    qq[SELECT count(1) = 0
       FROM pg_subscription_rel
       WHERE srsubstate NOT IN ('r', 's')]);

The new function wait_for_subscription_sync() can be used to replace the
above code. This eliminates duplicated code and makes it easier to write
future tests.

Author: Masahiko Sawada
Reviewed by: Amit Kapila, Shi yu
Discussion: https://postgr.es/m/CAD21AoC-fvAkaKHa4t1urupwL8xbAcWRePeETvshvy80f6WV1A@mail.gmail.com
This commit is contained in:
Amit Kapila
2022-08-03 15:31:17 +05:30
parent c67c2e2a29
commit 0c20dd33db
27 changed files with 129 additions and 260 deletions
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44
src/test/perl/PostgreSQL/Test/Cluster.pm
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@@ -2648,6 +2648,50 @@ sub wait_for_slot_catchup
=pod
=item $node->wait_for_subscription_sync(publisher, subname, dbname)
Wait for all tables in pg_subscription_rel to complete the initial
synchronization (i.e to be either in 'syncdone' or 'ready' state).
If the publisher node is given, additionally, check if the subscriber has
caught up to what has been committed on the primary. This is useful to
ensure that the initial data synchronization has been completed after
creating a new subscription.
If there is no active replication connection from this peer, wait until
poll_query_until timeout.
This is not a test. It die()s on failure.
=cut
sub wait_for_subscription_sync
{
my ($self, $publisher, $subname, $dbname) = @_;
my $name = $self->name;
$dbname = defined($dbname) ? $dbname : 'postgres';
# Wait for all tables to finish initial sync.
print "Waiting for all subscriptions in \"$name\" to synchronize data\n";
my $query =
qq[SELECT count(1) = 0 FROM pg_subscription_rel WHERE srsubstate NOT IN ('r', 's');];
$self->poll_query_until($dbname, $query)
or croak "timed out waiting for subscriber to synchronize data";
# Then, wait for the replication to catchup if required.
if (defined($publisher))
{
croak 'subscription name must be specified' unless defined($subname);
$publisher->wait_for_catchup($subname);
}
print "done\n";
return;
}
=pod
=item $node->wait_for_log(regexp, offset)
Waits for the contents of the server log file, starting at the given offset, to