Editor: Fix 'parents' argument validation for Query block

[Mamaduka]

Gutenberg PR: WordPress/gutenberg#68983
Trac ticket: https://core.trac.wordpress.org/ticket/62901

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Props mamaduka, audrasjb, peterwilsoncc.

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[peterwilsoncc]

This looks good to me, I used the following to test it against trunk and this branch and it now behaves as expected. Are you able to put this in to the test suite?

/**
 * @ticket 62901
 */
public function test_build_query_vars_from_query_block_with_top_level_parent() {
	$this->registry->register(
		'core/example',
		array( 'uses_context' => array( 'query' ) )
	);

	$parsed_blocks = parse_blocks( '<!-- wp:example {"ok":true} -->a<!-- wp:example /-->b<!-- /wp:example -->' );
	$parsed_block  = $parsed_blocks[0];
	$context       = array(
		'query' => array(
			'postType' => 'page',
			'parents'  => array( 0 ),
		),
	);
	$block         = new WP_Block( $parsed_block, $context, $this->registry );
	$query         = build_query_vars_from_query_block( $block, 1 );

	$this->assertSame(
		array(
			'post_type'       => 'page',
			'order'           => 'DESC',
			'orderby'         => 'date',
			'post__not_in'    => array(),
			'tax_query'       => array(),
			'post_parent__in' => array( 0 ),
		),
		$query
	);
}

[Mamaduka]

Thank you, @peterwilsoncc!

[audrasjb]

This changeset and the related unit tests look good to me 👍

[Mamaduka]

Committed https://core.trac.wordpress.org/changeset/59761.