Operations not chained correctly in BatchingConnection

[DavideD]

This code here:

else {
    CompletionStage<Void> lastBatch = executeBatch();
    newBatch( sql, paramValues, expectation );
    return lastBatch;
}

should be:

return executeBatch()
    .thenAccept( lastBatch -> newBatch( sql, paramValues, expectation ) );