Helper function for revision counting.
private function countRevisions($node, $paragraph1, $paragraph2, $revisions_count) {
$node_revisions_count = \Drupal::entityQuery('node')
->condition('nid', $node
->id())
->accessCheck(TRUE)
->allRevisions()
->count()
->execute();
$this
->assertEquals($revisions_count, $node_revisions_count);
$paragraph1_revisions_count = \Drupal::entityQuery('paragraph')
->condition('id', $paragraph1)
->accessCheck(TRUE)
->allRevisions()
->count()
->execute();
$this
->assertEquals($revisions_count, $paragraph1_revisions_count);
$paragraph2_revisions_count = \Drupal::entityQuery('paragraph')
->condition('id', $paragraph2)
->accessCheck(TRUE)
->allRevisions()
->count()
->execute();
$this
->assertEquals($revisions_count, $paragraph2_revisions_count);
}