diff --git a/tests/phpunit/tests/post.php b/tests/phpunit/tests/post.php
index 6f2641e9f9..1c462d0a36 100644
--- a/tests/phpunit/tests/post.php
+++ b/tests/phpunit/tests/post.php
@@ -30,604 +30,6 @@ class Tests_Post extends WP_UnitTestCase {
 		remove_role( 'grammarian' );
 	}
 
-	public function set_up() {
-		parent::set_up();
-
-		wp_set_current_user( self::$editor_id );
-		_set_cron_array( array() );
-	}
-
-	/**
-	 * Helper function: return the timestamp(s) of cron jobs for the specified hook and post.
-	 */
-	private function next_schedule_for_post( $hook, $post_id ) {
-		return wp_next_scheduled( 'publish_future_post', array( 0 => (int) $post_id ) );
-	}
-
-	/**
-	 * Helper function, unsets current user globally.
-	 */
-	private function unset_current_user() {
-		global $current_user, $user_ID;
-
-		$current_user = null;
-		$user_ID      = null;
-	}
-
-	/**
-	 * Test simple valid behavior: insert and get a post.
-	 *
-	 * @dataProvider data_vb_insert_get_delete
-	 */
-	public function test_vb_insert_get_delete( $post_type ) {
-		register_post_type(
-			'cpt',
-			array(
-				'taxonomies' => array( 'post_tag', 'ctax' ),
-			)
-		);
-		register_taxonomy( 'ctax', 'cpt' );
-
-		$data = array(
-			'post_author'  => self::$editor_id,
-			'post_status'  => 'publish',
-			'post_content' => "{$post_type}_content",
-			'post_title'   => "{$post_type}_title",
-			'tax_input'    => array(
-				'post_tag' => 'tag1,tag2',
-				'ctax'     => 'cterm1,cterm2',
-			),
-			'post_type'    => $post_type,
-		);
-
-		// Insert a post and make sure the ID is OK.
-		$post_id = wp_insert_post( $data );
-		$this->assertIsInt( $post_id );
-		$this->assertGreaterThan( 0, $post_id );
-
-		// Fetch the post and make sure it matches.
-		$post = get_post( $post_id );
-
-		$this->assertSame( $data['post_content'], $post->post_content );
-		$this->assertSame( $data['post_title'], $post->post_title );
-		$this->assertSame( $data['post_status'], $post->post_status );
-		$this->assertEquals( $data['post_author'], $post->post_author );
-
-		// Test cache state.
-		$post_cache = wp_cache_get( $post_id, 'posts' );
-		$this->assertInstanceOf( 'stdClass', $post_cache );
-		$this->assertSame( $post_id, $post_cache->ID );
-
-		update_object_term_cache( $post_id, $post_type );
-		$term_cache = wp_cache_get( $post_id, 'post_tag_relationships' );
-		$this->assertIsArray( $term_cache );
-		$this->assertCount( 2, $term_cache );
-
-		$term_cache = wp_cache_get( $post_id, 'ctax_relationships' );
-		if ( 'cpt' === $post_type ) {
-			$this->assertIsArray( $term_cache );
-			$this->assertCount( 2, $term_cache );
-		} else {
-			$this->assertFalse( $term_cache );
-		}
-
-		wp_delete_post( $post_id, true );
-
-		$this->assertFalse( wp_cache_get( $post_id, 'posts' ) );
-		$this->assertFalse( wp_cache_get( $post_id, 'post_tag_relationships' ) );
-		$this->assertFalse( wp_cache_get( $post_id, 'ctax_relationships' ) );
-
-		$GLOBALS['wp_taxonomies']['post_tag']->object_type = array( 'post' );
-	}
-
-	public function data_vb_insert_get_delete() {
-		$post_types = array( 'post', 'cpt' );
-
-		return $this->text_array_to_dataprovider( $post_types );
-	}
-
-	/**
-	 * Insert a post with a future date, and make sure the status and cron schedule are correct.
-	 */
-	public function test_vb_insert_future() {
-		$future_date = strtotime( '+1 day' );
-
-		$data = array(
-			'post_author'  => self::$editor_id,
-			'post_status'  => 'publish',
-			'post_content' => 'content',
-			'post_title'   => 'title',
-			'post_date'    => date_format( date_create( "@{$future_date}" ), 'Y-m-d H:i:s' ),
-		);
-
-		// Insert a post and make sure the ID is OK.
-		$post_id = wp_insert_post( $data );
-		$this->assertIsInt( $post_id );
-		$this->assertGreaterThan( 0, $post_id );
-
-		// Fetch the post and make sure it matches.
-		$post = get_post( $post_id );
-
-		$this->assertSame( $data['post_content'], $post->post_content );
-		$this->assertSame( $data['post_title'], $post->post_title );
-		$this->assertSame( 'future', $post->post_status );
-		$this->assertEquals( $data['post_author'], $post->post_author );
-		$this->assertSame( $data['post_date'], $post->post_date );
-
-		// There should be a publish_future_post hook scheduled on the future date.
-		$this->assertSame( $future_date, $this->next_schedule_for_post( 'publish_future_post', $post_id ) );
-	}
-
-	/**
-	 * Insert a post with a future date, and make sure the status and cron schedule are correct.
-	 */
-	public function test_vb_insert_future_over_dst() {
-		// Some magic days - one DST one not.
-		$future_date_1 = strtotime( 'June 21st +1 year' );
-		$future_date_2 = strtotime( 'Jan 11th +1 year' );
-
-		$data = array(
-			'post_author'  => self::$editor_id,
-			'post_status'  => 'publish',
-			'post_content' => 'content',
-			'post_title'   => 'title',
-			'post_date'    => date_format( date_create( "@{$future_date_1}" ), 'Y-m-d H:i:s' ),
-		);
-
-		// Insert a post and make sure the ID is OK.
-		$post_id = wp_insert_post( $data );
-
-		// Fetch the post and make sure has the correct date and status.
-		$post = get_post( $post_id );
-		$this->assertSame( 'future', $post->post_status );
-		$this->assertSame( $data['post_date'], $post->post_date );
-
-		// Check that there's a publish_future_post job scheduled at the right time.
-		$this->assertSame( $future_date_1, $this->next_schedule_for_post( 'publish_future_post', $post_id ) );
-
-		// Now save it again with a date further in the future.
-		$data['ID']            = $post_id;
-		$data['post_date']     = date_format( date_create( "@{$future_date_2}" ), 'Y-m-d H:i:s' );
-		$data['post_date_gmt'] = null;
-		wp_update_post( $data );
-
-		// Fetch the post again and make sure it has the new post_date.
-		$post = get_post( $post_id );
-		$this->assertSame( 'future', $post->post_status );
-		$this->assertSame( $data['post_date'], $post->post_date );
-
-		// And the correct date on the cron job.
-		$this->assertSame( $future_date_2, $this->next_schedule_for_post( 'publish_future_post', $post_id ) );
-	}
-
-	/**
-	 * Future post bug: posts get published at the wrong time if you edit the timestamp.
-	 *
-	 * @ticket 4710
-	 */
-	public function test_vb_insert_future_edit_bug() {
-		$future_date_1 = strtotime( '+1 day' );
-		$future_date_2 = strtotime( '+2 day' );
-
-		$data = array(
-			'post_author'  => self::$editor_id,
-			'post_status'  => 'publish',
-			'post_content' => 'content',
-			'post_title'   => 'title',
-			'post_date'    => date_format( date_create( "@{$future_date_1}" ), 'Y-m-d H:i:s' ),
-		);
-
-		// Insert a post and make sure the ID is OK.
-		$post_id = wp_insert_post( $data );
-
-		// Fetch the post and make sure has the correct date and status.
-		$post = get_post( $post_id );
-		$this->assertSame( 'future', $post->post_status );
-		$this->assertSame( $data['post_date'], $post->post_date );
-
-		// Check that there's a publish_future_post job scheduled at the right time.
-		$this->assertSame( $future_date_1, $this->next_schedule_for_post( 'publish_future_post', $post_id ) );
-
-		// Now save it again with a date further in the future.
-		$data['ID']            = $post_id;
-		$data['post_date']     = date_format( date_create( "@{$future_date_2}" ), 'Y-m-d H:i:s' );
-		$data['post_date_gmt'] = null;
-		wp_update_post( $data );
-
-		// Fetch the post again and make sure it has the new post_date.
-		$post = get_post( $post_id );
-		$this->assertSame( 'future', $post->post_status );
-		$this->assertSame( $data['post_date'], $post->post_date );
-
-		// And the correct date on the cron job.
-		$this->assertSame( $future_date_2, $this->next_schedule_for_post( 'publish_future_post', $post_id ) );
-	}
-
-	/**
-	 * Insert a draft post with a future date, and make sure no cron schedule is set.
-	 */
-	public function test_vb_insert_future_draft() {
-		$future_date = strtotime( '+1 day' );
-
-		$data = array(
-			'post_author'  => self::$editor_id,
-			'post_status'  => 'draft',
-			'post_content' => 'content',
-			'post_title'   => 'title',
-			'post_date'    => date_format( date_create( "@{$future_date}" ), 'Y-m-d H:i:s' ),
-		);
-
-		// Insert a post and make sure the ID is OK.
-		$post_id = wp_insert_post( $data );
-		$this->assertIsInt( $post_id );
-		$this->assertGreaterThan( 0, $post_id );
-
-		// Fetch the post and make sure it matches.
-		$post = get_post( $post_id );
-
-		$this->assertSame( $data['post_content'], $post->post_content );
-		$this->assertSame( $data['post_title'], $post->post_title );
-		$this->assertSame( 'draft', $post->post_status );
-		$this->assertEquals( $data['post_author'], $post->post_author );
-		$this->assertSame( $data['post_date'], $post->post_date );
-
-		// There should be a publish_future_post hook scheduled on the future date.
-		$this->assertFalse( $this->next_schedule_for_post( 'publish_future_post', $post_id ) );
-
-	}
-
-	/**
-	 * Insert a future post, then edit and change it to draft, and make sure cron gets it right.
-	 */
-	public function test_vb_insert_future_change_to_draft() {
-		$future_date_1 = strtotime( '+1 day' );
-
-		$data = array(
-			'post_author'  => self::$editor_id,
-			'post_status'  => 'publish',
-			'post_content' => 'content',
-			'post_title'   => 'title',
-			'post_date'    => date_format( date_create( "@{$future_date_1}" ), 'Y-m-d H:i:s' ),
-		);
-
-		// Insert a post and make sure the ID is OK.
-		$post_id = wp_insert_post( $data );
-
-		// Fetch the post and make sure has the correct date and status.
-		$post = get_post( $post_id );
-		$this->assertSame( 'future', $post->post_status );
-		$this->assertSame( $data['post_date'], $post->post_date );
-
-		// Check that there's a publish_future_post job scheduled at the right time.
-		$this->assertSame( $future_date_1, $this->next_schedule_for_post( 'publish_future_post', $post_id ) );
-
-		// Now save it again with status set to draft.
-		$data['ID']          = $post_id;
-		$data['post_status'] = 'draft';
-		wp_update_post( $data );
-
-		// Fetch the post again and make sure it has the new post_date.
-		$post = get_post( $post_id );
-		$this->assertSame( 'draft', $post->post_status );
-		$this->assertSame( $data['post_date'], $post->post_date );
-
-		// And the correct date on the cron job.
-		$this->assertFalse( $this->next_schedule_for_post( 'publish_future_post', $post_id ) );
-	}
-
-	/**
-	 * Insert a future post, then edit and change the status, and make sure cron gets it right.
-	 *
-	 * @dataProvider data_vb_insert_future_change_status
-	 */
-	public function test_vb_insert_future_change_status( $status ) {
-		$future_date_1 = strtotime( '+1 day' );
-
-		$data = array(
-			'post_author'  => self::$editor_id,
-			'post_status'  => 'publish',
-			'post_content' => "{$status}_content",
-			'post_title'   => "{$status}_title",
-			'post_date'    => date_format( date_create( "@{$future_date_1}" ), 'Y-m-d H:i:s' ),
-		);
-
-		// Insert a post and make sure the ID is OK.
-		$post_id = wp_insert_post( $data );
-
-		// Fetch the post and make sure has the correct date and status.
-		$post = get_post( $post_id );
-		$this->assertSame( 'future', $post->post_status );
-		$this->assertSame( $data['post_date'], $post->post_date );
-
-		// Check that there's a publish_future_post job scheduled at the right time.
-		$this->assertSame( $future_date_1, $this->next_schedule_for_post( 'publish_future_post', $post_id ) );
-
-		// Now save it again with status changed.
-		$data['ID']          = $post_id;
-		$data['post_status'] = $status;
-		wp_update_post( $data );
-
-		// Fetch the post again and make sure it has the new post_date.
-		$post = get_post( $post_id );
-		$this->assertSame( $status, $post->post_status );
-		$this->assertSame( $data['post_date'], $post->post_date );
-
-		// And the correct date on the cron job.
-		$this->assertFalse( $this->next_schedule_for_post( 'publish_future_post', $post_id ) );
-	}
-
-	public function data_vb_insert_future_change_status() {
-		$statuses = array(
-			'draft',
-			'static',
-			'object',
-			'attachment',
-			'inherit',
-			'pending',
-		);
-
-		return $this->text_array_to_dataprovider( $statuses );
-	}
-
-	/**
-	 * Insert a draft post with a future date, and make sure no cron schedule is set.
-	 */
-	public function test_vb_insert_future_private() {
-		$future_date = strtotime( '+1 day' );
-
-		$data = array(
-			'post_author'  => self::$editor_id,
-			'post_status'  => 'private',
-			'post_content' => 'content',
-			'post_title'   => 'title',
-			'post_date'    => date_format( date_create( "@{$future_date}" ), 'Y-m-d H:i:s' ),
-		);
-
-		// Insert a post and make sure the ID is OK.
-		$post_id = wp_insert_post( $data );
-		$this->assertIsInt( $post_id );
-		$this->assertGreaterThan( 0, $post_id );
-
-		// Fetch the post and make sure it matches.
-		$post = get_post( $post_id );
-
-		$this->assertSame( $data['post_content'], $post->post_content );
-		$this->assertSame( $data['post_title'], $post->post_title );
-		$this->assertSame( 'private', $post->post_status );
-		$this->assertEquals( $data['post_author'], $post->post_author );
-		$this->assertSame( $data['post_date'], $post->post_date );
-
-		// There should be a publish_future_post hook scheduled on the future date.
-		$this->assertFalse( $this->next_schedule_for_post( 'publish_future_post', $post_id ) );
-	}
-
-	/**
-	 * Insert a post with an invalid date, make sure it fails.
-	 *
-	 * @ticket 17180
-	 */
-	public function test_vb_insert_invalid_date() {
-		$data = array(
-			'post_author'  => self::$editor_id,
-			'post_status'  => 'publish',
-			'post_content' => 'content',
-			'post_title'   => 'title',
-			'post_date'    => '2012-02-30 00:00:00',
-		);
-
-		// Test both return paths with or without WP_Error.
-		$post_id = wp_insert_post( $data, true );
-		$this->assertWPError( $post_id );
-		$this->assertSame( 'invalid_date', $post_id->get_error_code() );
-
-		$post_id = wp_insert_post( $data );
-		$this->assertSame( 0, $post_id );
-	}
-
-	/**
-	 * Insert a future post, then edit and change it to private, and make sure cron gets it right.
-	 */
-	public function test_vb_insert_future_change_to_private() {
-		$future_date_1 = strtotime( '+1 day' );
-
-		$data = array(
-			'post_author'  => self::$editor_id,
-			'post_status'  => 'publish',
-			'post_content' => 'content',
-			'post_title'   => 'title',
-			'post_date'    => date_format( date_create( "@{$future_date_1}" ), 'Y-m-d H:i:s' ),
-		);
-
-		// Insert a post and make sure the ID is OK.
-		$post_id = wp_insert_post( $data );
-
-		// Fetch the post and make sure has the correct date and status.
-		$post = get_post( $post_id );
-		$this->assertSame( 'future', $post->post_status );
-		$this->assertSame( $data['post_date'], $post->post_date );
-
-		// Check that there's a publish_future_post job scheduled at the right time.
-		$this->assertSame( $future_date_1, $this->next_schedule_for_post( 'publish_future_post', $post_id ) );
-
-		// Now save it again with status set to draft.
-		$data['ID']          = $post_id;
-		$data['post_status'] = 'private';
-		wp_update_post( $data );
-
-		// Fetch the post again and make sure it has the new post_date.
-		$post = get_post( $post_id );
-		$this->assertSame( 'private', $post->post_status );
-		$this->assertSame( $data['post_date'], $post->post_date );
-
-		// And the correct date on the cron job.
-		$this->assertFalse( $this->next_schedule_for_post( 'publish_future_post', $post_id ) );
-	}
-
-	/**
-	 * @ticket 5305
-	 */
-	public function test_wp_insert_post_should_not_allow_a_bare_numeric_slug_that_might_conflict_with_a_date_archive_when_generating_from_an_empty_post_title() {
-		$this->set_permalink_structure( '/%postname%/' );
-
-		$post_id = wp_insert_post(
-			array(
-				'post_title'   => '',
-				'post_content' => 'test',
-				'post_status'  => 'publish',
-				'post_type'    => 'post',
-			)
-		);
-
-		$post = get_post( $post_id );
-
-		$this->assertSame( "$post_id-2", $post->post_name );
-	}
-
-	/**
-	 * @ticket 5305
-	 * @ticket 33392
-	 */
-	public function test_wp_insert_post_should_invalidate_post_cache_before_generating_guid_when_post_name_is_empty_and_is_generated_from_the_post_ID() {
-		register_post_type( 'wptests_pt' );
-
-		$post_id = wp_insert_post(
-			array(
-				'post_title'  => '',
-				'post_type'   => 'wptests_pt',
-				'post_status' => 'publish',
-			)
-		);
-
-		$post = get_post( $post_id );
-
-		$this->assertStringContainsString( 'wptests_pt=' . $post_id, $post->guid );
-	}
-
-	/**
-	 * @ticket 55877
-	 * @covers ::wp_insert_post
-	 */
-	public function test_wp_insert_post_should_not_trigger_warning_for_pending_posts_with_unknown_cpt() {
-		$post_id = wp_insert_post(
-			array(
-				'post_title'  => 'title',
-				'post_type'   => 'unknown',
-				'post_status' => 'pending',
-			)
-		);
-
-		$this->assertIsInt( $post_id );
-		$this->assertGreaterThan( 0, $post_id );
-	}
-
-	/**
-	 * @ticket 20451
-	 */
-	public function test_wp_insert_post_with_meta_input() {
-		$post_id = wp_insert_post(
-			array(
-				'post_title'   => '',
-				'post_content' => 'test',
-				'post_status'  => 'publish',
-				'post_type'    => 'post',
-				'meta_input'   => array(
-					'hello' => 'world',
-					'foo'   => 'bar',
-				),
-			)
-		);
-
-		$this->assertSame( 'world', get_post_meta( $post_id, 'hello', true ) );
-		$this->assertSame( 'bar', get_post_meta( $post_id, 'foo', true ) );
-	}
-
-	/**
-	 * "When I delete a future post using wp_delete_post( $post->ID ) it does not update the cron correctly."
-	 *
-	 * @ticket 5364
-	 */
-	public function test_delete_future_post_cron() {
-		$future_date = strtotime( '+1 day' );
-
-		$data = array(
-			'post_author'  => self::$editor_id,
-			'post_status'  => 'publish',
-			'post_content' => 'content',
-			'post_title'   => 'title',
-			'post_date'    => date_format( date_create( "@{$future_date}" ), 'Y-m-d H:i:s' ),
-		);
-
-		// Insert a post and make sure the ID is OK.
-		$post_id = wp_insert_post( $data );
-
-		// Check that there's a publish_future_post job scheduled at the right time.
-		$this->assertSame( $future_date, $this->next_schedule_for_post( 'publish_future_post', $post_id ) );
-
-		// Now delete the post and make sure the cron entry is removed.
-		wp_delete_post( $post_id );
-
-		$this->assertFalse( $this->next_schedule_for_post( 'publish_future_post', $post_id ) );
-	}
-
-	/**
-	 * Bug: permalink doesn't work if post title is empty.
-	 *
-	 * Might only fail if the post ID is greater than four characters.
-	 *
-	 * @ticket 5305
-	 */
-	public function test_permalink_without_title() {
-		$this->set_permalink_structure( '/%year%/%monthnum%/%day%/%postname%/' );
-
-		$data = array(
-			'post_author'  => self::$editor_id,
-			'post_status'  => 'publish',
-			'post_content' => 'content',
-			'post_title'   => '',
-			'post_date'    => '2007-10-31 06:15:00',
-		);
-
-		// Insert a post and make sure the ID is OK.
-		$post_id = wp_insert_post( $data );
-
-		// Permalink should include the post ID at the end.
-		$expected = get_option( 'siteurl' ) . '/2007/10/31/' . $post_id . '/';
-		$this->assertSame( $expected, get_permalink( $post_id ) );
-	}
-
-	/**
-	 * @ticket 23708
-	 */
-	public function test_get_post_ancestors_within_loop() {
-		global $post;
-
-		$parent_id = self::factory()->post->create();
-		$post      = self::factory()->post->create_and_get(
-			array(
-				'post_parent' => $parent_id,
-			)
-		);
-
-		$this->assertSame( array( $parent_id ), get_post_ancestors( 0 ) );
-	}
-
-	/**
-	 * @ticket 23474
-	 */
-	public function test_update_invalid_post_id() {
-		$post_id = self::factory()->post->create();
-		$post    = get_post( $post_id, ARRAY_A );
-
-		$post['ID'] = 123456789;
-
-		$this->assertSame( 0, wp_insert_post( $post ) );
-		$this->assertSame( 0, wp_update_post( $post ) );
-
-		$this->assertInstanceOf( 'WP_Error', wp_insert_post( $post, true ) );
-		$this->assertInstanceOf( 'WP_Error', wp_update_post( $post, true ) );
-
-	}
-
 	public function test_parse_post_content_single_page() {
 		global $multipage, $pages, $numpages;
 
@@ -736,34 +138,6 @@ class Tests_Post extends WP_UnitTestCase {
 		$this->assertSame( array( 'Page 0' ), $pages );
 	}
 
-	/**
-	 * @ticket 19373
-	 */
-	public function test_insert_programmatic_sanitized() {
-		$this->unset_current_user();
-
-		register_taxonomy( 'test_tax', 'post' );
-
-		$title = 'title';
-		$data  = array(
-			'post_author'  => self::$editor_id,
-			'post_status'  => 'publish',
-			'post_content' => 'content',
-			'post_title'   => $title,
-			'tax_input'    => array(
-				'test_tax' => array( 'term', 'term2', 'term3' ),
-			),
-		);
-
-		$post_id = wp_insert_post( $data, true, true );
-		$this->assertIsInt( $post_id );
-		$this->assertGreaterThan( 0, $post_id );
-
-		$post = get_post( $post_id );
-		$this->assertEquals( self::$editor_id, $post->post_author );
-		$this->assertSame( $title, $post->post_title );
-	}
-
 	/**
 	 * @ticket 24803
 	 */
@@ -878,6 +252,8 @@ class Tests_Post extends WP_UnitTestCase {
 		$post = self::factory()->post->create( array( 'post_type' => $post_type ) );
 		wp_set_object_terms( $post, 'foo', $tax );
 
+		wp_set_current_user( self::$editor_id );
+
 		$wp_tag_cloud = wp_tag_cloud(
 			array(
 				'post_type' => $post_type,
@@ -935,91 +311,6 @@ class Tests_Post extends WP_UnitTestCase {
 		}
 	}
 
-	/**
-	 * @ticket 31168
-	 */
-	public function test_wp_insert_post_default_comment_ping_status_open() {
-		$post_id = self::factory()->post->create(
-			array(
-				'post_author'  => self::$editor_id,
-				'post_status'  => 'publish',
-				'post_content' => 'content',
-				'post_title'   => 'title',
-			)
-		);
-		$post    = get_post( $post_id );
-
-		$this->assertSame( 'open', $post->comment_status );
-		$this->assertSame( 'open', $post->ping_status );
-	}
-
-	/**
-	 * @ticket 31168
-	 */
-	public function test_wp_insert_post_page_default_comment_ping_status_closed() {
-		$post_id = self::factory()->post->create(
-			array(
-				'post_author'  => self::$editor_id,
-				'post_status'  => 'publish',
-				'post_content' => 'content',
-				'post_title'   => 'title',
-				'post_type'    => 'page',
-			)
-		);
-		$post    = get_post( $post_id );
-
-		$this->assertSame( 'closed', $post->comment_status );
-		$this->assertSame( 'closed', $post->ping_status );
-	}
-
-	/**
-	 * @ticket 31168
-	 */
-	public function test_wp_insert_post_cpt_default_comment_ping_status_open() {
-		$post_type = rand_str( 20 );
-		register_post_type( $post_type, array( 'supports' => array( 'comments', 'trackbacks' ) ) );
-
-		$post_id = self::factory()->post->create(
-			array(
-				'post_author'  => self::$editor_id,
-				'post_status'  => 'publish',
-				'post_content' => rand_str(),
-				'post_title'   => rand_str(),
-				'post_type'    => $post_type,
-			)
-		);
-		$post    = get_post( $post_id );
-
-		_unregister_post_type( $post_type );
-
-		$this->assertSame( 'open', $post->comment_status );
-		$this->assertSame( 'open', $post->ping_status );
-	}
-
-	/**
-	 * @ticket 31168
-	 */
-	public function test_wp_insert_post_cpt_default_comment_ping_status_closed() {
-		$post_type = rand_str( 20 );
-		register_post_type( $post_type );
-
-		$post_id = self::factory()->post->create(
-			array(
-				'post_author'  => self::$editor_id,
-				'post_status'  => 'publish',
-				'post_content' => rand_str(),
-				'post_title'   => rand_str(),
-				'post_type'    => $post_type,
-			)
-		);
-		$post    = get_post( $post_id );
-
-		_unregister_post_type( $post_type );
-
-		$this->assertSame( 'closed', $post->comment_status );
-		$this->assertSame( 'closed', $post->ping_status );
-	}
-
 	/**
 	 * If a post is sticky and is updated by a user that does not have the publish_post capability,
 	 * it should _stay_ sticky.
@@ -1127,74 +418,6 @@ class Tests_Post extends WP_UnitTestCase {
 		$this->assertSame( 1, $a2->get_call_count() );
 	}
 
-	/**
-	 * If a post is updated without providing a post_name param,
-	 * a new slug should not be generated.
-	 *
-	 * @ticket 34865
-	 */
-	public function test_post_updates_without_slug_provided() {
-		$post_id = self::factory()->post->create(
-			array(
-				'post_title'  => 'Stuff',
-				'post_status' => 'publish',
-			)
-		);
-
-		$data = array(
-			'ID'         => $post_id,
-			'post_title' => 'Stuff and Things',
-		);
-
-		wp_insert_post( $data );
-
-		$updated_post = get_post( $post_id );
-		// Ensure changing the post_title didn't modify the post_name.
-		$this->assertSame( 'stuff', $updated_post->post_name );
-	}
-
-	/**
-	 * @ticket 32585
-	 */
-	public function test_wp_insert_post_author_zero() {
-		$post_id = self::factory()->post->create( array( 'post_author' => 0 ) );
-
-		$this->assertEquals( 0, get_post( $post_id )->post_author );
-	}
-
-	/**
-	 * @ticket 32585
-	 */
-	public function test_wp_insert_post_author_null() {
-		$post_id = self::factory()->post->create( array( 'post_author' => null ) );
-
-		$this->assertEquals( self::$editor_id, get_post( $post_id )->post_author );
-	}
-
-	/**
-	 * @ticket 15946
-	 */
-	public function test_wp_insert_post_should_respect_post_date_gmt() {
-		$data = array(
-			'post_author'   => self::$editor_id,
-			'post_status'   => 'publish',
-			'post_content'  => 'content',
-			'post_title'    => 'title',
-			'post_date_gmt' => '2014-01-01 12:00:00',
-		);
-
-		// Insert a post and make sure the ID is OK.
-		$post_id = wp_insert_post( $data );
-
-		$post = get_post( $post_id );
-
-		$this->assertSame( $data['post_content'], $post->post_content );
-		$this->assertSame( $data['post_title'], $post->post_title );
-		$this->assertEquals( $data['post_author'], $post->post_author );
-		$this->assertSame( get_date_from_gmt( $data['post_date_gmt'] ), $post->post_date );
-		$this->assertSame( $data['post_date_gmt'], $post->post_date_gmt );
-	}
-
 	public function test_wp_delete_post_reassign_hierarchical_post_type() {
 		$grandparent_page_id = self::factory()->post->create( array( 'post_type' => 'page' ) );
 		$parent_page_id      = self::factory()->post->create(
@@ -1219,57 +442,6 @@ class Tests_Post extends WP_UnitTestCase {
 		$this->assertSame( 0, get_post( $page_id )->post_parent );
 	}
 
-	/**
-	 * Test ensuring that the post_name (UUID) is preserved when wp_insert_post()/wp_update_post() is called.
-	 *
-	 * @see _wp_customize_changeset_filter_insert_post_data()
-	 * @ticket 30937
-	 */
-	public function test_wp_insert_post_for_customize_changeset_should_not_drop_post_name() {
-		$this->assertSame( 10, has_filter( 'wp_insert_post_data', '_wp_customize_changeset_filter_insert_post_data' ) );
-
-		$changeset_data = array(
-			'blogname' => array(
-				'value' => 'Hello World',
-			),
-		);
-
-		wp_set_current_user( $this->factory()->user->create( array( 'role' => 'contributor' ) ) );
-
-		$uuid    = wp_generate_uuid4();
-		$post_id = wp_insert_post(
-			array(
-				'post_type'    => 'customize_changeset',
-				'post_name'    => strtoupper( $uuid ),
-				'post_content' => wp_json_encode( $changeset_data ),
-			)
-		);
-		$this->assertSame( $uuid, get_post( $post_id )->post_name, 'Expected lower-case UUID4 to be inserted.' );
-		$this->assertSame( $changeset_data, json_decode( get_post( $post_id )->post_content, true ) );
-
-		$changeset_data['blogname']['value'] = 'Hola Mundo';
-		wp_update_post(
-			array(
-				'ID'           => $post_id,
-				'post_status'  => 'draft',
-				'post_content' => wp_json_encode( $changeset_data ),
-			)
-		);
-		$this->assertSame( $uuid, get_post( $post_id )->post_name, 'Expected post_name to not have been dropped for drafts.' );
-		$this->assertSame( $changeset_data, json_decode( get_post( $post_id )->post_content, true ) );
-
-		$changeset_data['blogname']['value'] = 'Hallo Welt';
-		wp_update_post(
-			array(
-				'ID'           => $post_id,
-				'post_status'  => 'pending',
-				'post_content' => wp_json_encode( $changeset_data ),
-			)
-		);
-		$this->assertSame( $uuid, get_post( $post_id )->post_name, 'Expected post_name to not have been dropped for pending.' );
-		$this->assertSame( $changeset_data, json_decode( get_post( $post_id )->post_content, true ) );
-	}
-
 	/**
 	 * Test ensuring that the post_slug can be filtered with a custom value short circuiting the built in
 	 * function that tries to create a unique name based on the post name.
@@ -1297,324 +469,6 @@ class Tests_Post extends WP_UnitTestCase {
 		return 'override-slug-' . $post_type;
 	}
 
-	/**
-	 * @ticket 48113
-	 */
-	public function test_insert_post_should_respect_date_floating_post_status_arg() {
-		register_post_status( 'floating', array( 'date_floating' => true ) );
-
-		$post_id = self::factory()->post->create(
-			array(
-				'post_status'   => 'floating',
-				'post_date'     => null,
-				'post_date_gmt' => null,
-			)
-		);
-
-		$post = get_post( $post_id );
-		self::assertSame( '0000-00-00 00:00:00', $post->post_date_gmt );
-	}
-
-	/**
-	 * @ticket 48113
-	 */
-	public function test_insert_post_should_respect_date_floating_post_status_arg_not_set() {
-		register_post_status( 'not-floating', array( 'date_floating' => false ) );
-
-		$post_id = self::factory()->post->create(
-			array(
-				'post_status'   => 'floating',
-				'post_date'     => null,
-				'post_date_gmt' => null,
-			)
-		);
-
-		$post = get_post( $post_id );
-		self::assertEqualsWithDelta(
-			strtotime( gmdate( 'Y-m-d H:i:s' ) ),
-			strtotime( $post->post_date_gmt ),
-			2,
-			'The dates should be equal'
-		);
-	}
-
-	/**
-	 * Test ensuring that wp_update_post() does not unintentionally modify post tags
-	 * if the post has several tags with the same name but different slugs.
-	 *
-	 * Tags should only be modified if 'tags_input' parameter was explicitly provided,
-	 * and is different from the existing tags.
-	 *
-	 * @ticket 45121
-	 */
-	public function test_update_post_should_only_modify_post_tags_if_different_tags_input_was_provided() {
-		$tag_1 = wp_insert_term( 'wp_update_post_tag', 'post_tag', array( 'slug' => 'wp_update_post_tag_1' ) );
-		$tag_2 = wp_insert_term( 'wp_update_post_tag', 'post_tag', array( 'slug' => 'wp_update_post_tag_2' ) );
-		$tag_3 = wp_insert_term( 'wp_update_post_tag', 'post_tag', array( 'slug' => 'wp_update_post_tag_3' ) );
-
-		$post_id = self::factory()->post->create(
-			array(
-				'tags_input' => array( $tag_1['term_id'], $tag_2['term_id'] ),
-			)
-		);
-
-		$post = get_post( $post_id );
-
-		$tags = wp_get_post_tags( $post->ID, array( 'fields' => 'ids' ) );
-		$this->assertSameSets( array( $tag_1['term_id'], $tag_2['term_id'] ), $tags );
-
-		wp_update_post( $post );
-
-		$tags = wp_get_post_tags( $post->ID, array( 'fields' => 'ids' ) );
-		$this->assertSameSets( array( $tag_1['term_id'], $tag_2['term_id'] ), $tags );
-
-		wp_update_post(
-			array(
-				'ID'         => $post->ID,
-				'tags_input' => array( $tag_2['term_id'], $tag_3['term_id'] ),
-			)
-		);
-
-		$tags = wp_get_post_tags( $post->ID, array( 'fields' => 'ids' ) );
-		$this->assertSameSets( array( $tag_2['term_id'], $tag_3['term_id'] ), $tags );
-	}
-
-	/**
-	 * @ticket 52187
-	 */
-	public function test_insert_empty_post_date() {
-		$post_date_gmt = '2020-12-29 10:11:45';
-		$invalid_date  = '2020-12-41 14:15:27';
-
-		// Empty post_date_gmt with floating status
-		$post_id = self::factory()->post->create(
-			array(
-				'post_status' => 'draft',
-			)
-		);
-		$post    = get_post( $post_id );
-		$this->assertEqualsWithDelta(
-			strtotime( gmdate( 'Y-m-d H:i:s' ) ),
-			strtotime( $post->post_date ),
-			2,
-			'The dates should be equal'
-		);
-		$this->assertSame( '0000-00-00 00:00:00', $post->post_date_gmt );
-
-		$post_id = self::factory()->post->create(
-			array(
-				'post_date_gmt' => '0000-00-00 00:00:00',
-				'post_status'   => 'draft',
-			)
-		);
-		$post    = get_post( $post_id );
-		$this->assertEqualsWithDelta(
-			strtotime( gmdate( 'Y-m-d H:i:s' ) ),
-			strtotime( $post->post_date ),
-			2,
-			'The dates should be equal'
-		);
-		$this->assertSame( '0000-00-00 00:00:00', $post->post_date_gmt );
-
-		// Empty post_date_gmt without floating status
-		$post_id = self::factory()->post->create(
-			array(
-				'post_status' => 'publish',
-			)
-		);
-		$post    = get_post( $post_id );
-		$this->assertEqualsWithDelta(
-			strtotime( gmdate( 'Y-m-d H:i:s' ) ),
-			strtotime( $post->post_date ),
-			2,
-			'The dates should be equal'
-		);
-		$this->assertEqualsWithDelta(
-			strtotime( gmdate( 'Y-m-d H:i:s' ) ),
-			strtotime( get_gmt_from_date( $post->post_date ) ),
-			2,
-			'The dates should be equal'
-		);
-
-		$post_id = self::factory()->post->create(
-			array(
-				'post_date_gmt' => '0000-00-00 00:00:00',
-				'post_status'   => 'publish',
-			)
-		);
-		$post    = get_post( $post_id );
-		$this->assertEqualsWithDelta(
-			strtotime( gmdate( 'Y-m-d H:i:s' ) ),
-			strtotime( $post->post_date ),
-			2,
-			'The dates should be equal'
-		);
-		$this->assertEqualsWithDelta(
-			strtotime( gmdate( 'Y-m-d H:i:s' ) ),
-			strtotime( get_gmt_from_date( $post->post_date ) ),
-			2,
-			'The dates should be equal'
-		);
-
-		// Valid post_date_gmt
-		$post_id = self::factory()->post->create(
-			array(
-				'post_date_gmt' => $post_date_gmt,
-			)
-		);
-		$post    = get_post( $post_id );
-		$this->assertSame( get_date_from_gmt( $post_date_gmt ), $post->post_date );
-		$this->assertSame( $post_date_gmt, $post->post_date_gmt );
-
-		// Invalid post_date_gmt
-		$post_id = self::factory()->post->create(
-			array(
-				'post_date_gmt' => $invalid_date,
-			)
-		);
-		$post    = get_post( $post_id );
-		$this->assertSame( '1970-01-01 00:00:00', $post->post_date );
-		$this->assertSame( '0000-00-00 00:00:00', $post->post_date_gmt );
-	}
-
-	/**
-	 * @ticket 52187
-	 */
-	public function test_insert_valid_post_date() {
-		$post_date     = '2020-12-28 11:26:35';
-		$post_date_gmt = '2020-12-29 10:11:45';
-		$invalid_date  = '2020-12-41 14:15:27';
-
-		// Empty post_date_gmt with floating status
-		$post_id = self::factory()->post->create(
-			array(
-				'post_date'   => $post_date,
-				'post_status' => 'draft',
-			)
-		);
-		$post    = get_post( $post_id );
-		$this->assertSame( $post_date, $post->post_date );
-		$this->assertSame( '0000-00-00 00:00:00', $post->post_date_gmt );
-
-		$post_id = self::factory()->post->create(
-			array(
-				'post_date'     => $post_date,
-				'post_date_gmt' => '0000-00-00 00:00:00',
-				'post_status'   => 'draft',
-			)
-		);
-		$post    = get_post( $post_id );
-		$this->assertSame( $post_date, $post->post_date );
-		$this->assertSame( '0000-00-00 00:00:00', $post->post_date_gmt );
-
-		// Empty post_date_gmt without floating status
-		$post_id = self::factory()->post->create(
-			array(
-				'post_date'   => $post_date,
-				'post_status' => 'publish',
-			)
-		);
-		$post    = get_post( $post_id );
-		$this->assertSame( $post_date, $post->post_date );
-		$this->assertSame( get_gmt_from_date( $post_date ), $post->post_date_gmt );
-
-		$post_id = self::factory()->post->create(
-			array(
-				'post_date'     => $post_date,
-				'post_date_gmt' => '0000-00-00 00:00:00',
-				'post_status'   => 'publish',
-			)
-		);
-		$post    = get_post( $post_id );
-		$this->assertSame( $post_date, $post->post_date );
-		$this->assertSame( get_gmt_from_date( $post_date ), $post->post_date_gmt );
-
-		// Valid post_date_gmt
-		$post_id = self::factory()->post->create(
-			array(
-				'post_date'     => $post_date,
-				'post_date_gmt' => $post_date_gmt,
-			)
-		);
-		$post    = get_post( $post_id );
-		$this->assertSame( $post_date, $post->post_date );
-		$this->assertSame( $post_date_gmt, $post->post_date_gmt );
-
-		// Invalid post_date_gmt
-		$post_id = self::factory()->post->create(
-			array(
-				'post_date'     => $post_date,
-				'post_date_gmt' => $invalid_date,
-			)
-		);
-		$post    = get_post( $post_id );
-		$this->assertSame( $post_date, $post->post_date );
-		$this->assertSame( '0000-00-00 00:00:00', $post->post_date_gmt );
-	}
-
-	/**
-	 * @ticket 52187
-	 */
-	public function test_insert_invalid_post_date() {
-		$post_date     = '2020-12-28 11:26:35';
-		$post_date_gmt = '2020-12-29 10:11:45';
-		$invalid_date  = '2020-12-41 14:15:27';
-
-		// Empty post_date_gmt with floating status
-		$post_id = self::factory()->post->create(
-			array(
-				'post_date'   => $invalid_date,
-				'post_status' => 'draft',
-			)
-		);
-		$this->assertSame( 0, $post_id );
-
-		$post_id = self::factory()->post->create(
-			array(
-				'post_date'     => $invalid_date,
-				'post_date_gmt' => '0000-00-00 00:00:00',
-				'post_status'   => 'draft',
-			)
-		);
-		$this->assertSame( 0, $post_id );
-
-		// Empty post_date_gmt without floating status
-		$post_id = self::factory()->post->create(
-			array(
-				'post_date'   => $invalid_date,
-				'post_status' => 'publish',
-			)
-		);
-		$this->assertSame( 0, $post_id );
-
-		$post_id = self::factory()->post->create(
-			array(
-				'post_date'     => $invalid_date,
-				'post_date_gmt' => '0000-00-00 00:00:00',
-				'post_status'   => 'publish',
-			)
-		);
-		$this->assertSame( 0, $post_id );
-
-		// Valid post_date_gmt
-		$post_id = self::factory()->post->create(
-			array(
-				'post_date'     => $invalid_date,
-				'post_date_gmt' => $post_date_gmt,
-			)
-		);
-		$this->assertSame( 0, $post_id );
-
-		// Invalid post_date_gmt
-		$post_id = self::factory()->post->create(
-			array(
-				'post_date'     => $invalid_date,
-				'post_date_gmt' => $invalid_date,
-			)
-		);
-		$this->assertSame( 0, $post_id );
-	}
-
 	/**
 	 * @ticket 52187
 	 */
diff --git a/tests/phpunit/tests/post/wpInsertPost.php b/tests/phpunit/tests/post/wpInsertPost.php
index c1a60753da..e51190c7aa 100644
--- a/tests/phpunit/tests/post/wpInsertPost.php
+++ b/tests/phpunit/tests/post/wpInsertPost.php
@@ -2,11 +2,13 @@
 
 /**
  * @group post
+ * @covers ::wp_insert_post
  */
 class Tests_Post_wpInsertPost extends WP_UnitTestCase {
 
 	protected static $user_ids = array(
 		'administrator' => null,
+		'editor'        => null,
 		'contributor'   => null,
 	);
 
@@ -17,6 +19,11 @@ class Tests_Post_wpInsertPost extends WP_UnitTestCase {
 					'role' => 'administrator',
 				)
 			),
+			'editor'        => $factory->user->create(
+				array(
+					'role' => 'editor',
+				)
+			),
 			'contributor'   => $factory->user->create(
 				array(
 					'role' => 'contributor',
@@ -65,6 +72,1154 @@ class Tests_Post_wpInsertPost extends WP_UnitTestCase {
 		);
 	}
 
+	/**
+	 * Helper function: return the timestamp(s) of cron jobs for the specified hook and post.
+	 */
+	private function next_schedule_for_post( $hook, $post_id ) {
+		return wp_next_scheduled( 'publish_future_post', array( 0 => (int) $post_id ) );
+	}
+
+	/**
+	 * Helper function, unsets current user globally.
+	 */
+	private function unset_current_user() {
+		global $current_user, $user_ID;
+
+		$current_user = null;
+		$user_ID      = null;
+	}
+
+	/**
+	 * Test simple valid behavior: insert and get a post.
+	 *
+	 * @dataProvider data_vb_insert_get_delete
+	 */
+	public function test_vb_insert_get_delete( $post_type ) {
+		register_post_type(
+			'cpt',
+			array(
+				'taxonomies' => array( 'post_tag', 'ctax' ),
+			)
+		);
+		register_taxonomy( 'ctax', 'cpt' );
+
+		wp_set_current_user( self::$user_ids['editor'] );
+
+		$data = array(
+			'post_author'  => self::$user_ids['editor'],
+			'post_status'  => 'publish',
+			'post_content' => "{$post_type}_content",
+			'post_title'   => "{$post_type}_title",
+			'tax_input'    => array(
+				'post_tag' => 'tag1,tag2',
+				'ctax'     => 'cterm1,cterm2',
+			),
+			'post_type'    => $post_type,
+		);
+
+		// Insert a post and make sure the ID is OK.
+		$post_id = wp_insert_post( $data );
+		$this->assertIsInt( $post_id );
+		$this->assertGreaterThan( 0, $post_id );
+
+		// Fetch the post and make sure it matches.
+		$post = get_post( $post_id );
+
+		$this->assertSame( $data['post_content'], $post->post_content );
+		$this->assertSame( $data['post_title'], $post->post_title );
+		$this->assertSame( $data['post_status'], $post->post_status );
+		$this->assertEquals( $data['post_author'], $post->post_author );
+
+		// Test cache state.
+		$post_cache = wp_cache_get( $post_id, 'posts' );
+		$this->assertInstanceOf( 'stdClass', $post_cache );
+		$this->assertSame( $post_id, $post_cache->ID );
+
+		update_object_term_cache( $post_id, $post_type );
+		$term_cache = wp_cache_get( $post_id, 'post_tag_relationships' );
+		$this->assertIsArray( $term_cache );
+		$this->assertCount( 2, $term_cache );
+
+		$term_cache = wp_cache_get( $post_id, 'ctax_relationships' );
+		if ( 'cpt' === $post_type ) {
+			$this->assertIsArray( $term_cache );
+			$this->assertCount( 2, $term_cache );
+		} else {
+			$this->assertFalse( $term_cache );
+		}
+
+		wp_delete_post( $post_id, true );
+
+		$this->assertFalse( wp_cache_get( $post_id, 'posts' ) );
+		$this->assertFalse( wp_cache_get( $post_id, 'post_tag_relationships' ) );
+		$this->assertFalse( wp_cache_get( $post_id, 'ctax_relationships' ) );
+
+		$GLOBALS['wp_taxonomies']['post_tag']->object_type = array( 'post' );
+	}
+
+	public function data_vb_insert_get_delete() {
+		$post_types = array( 'post', 'cpt' );
+
+		return $this->text_array_to_dataprovider( $post_types );
+	}
+
+	/**
+	 * Insert a post with a future date, and make sure the status and cron schedule are correct.
+	 */
+	public function test_vb_insert_future() {
+		$future_date = strtotime( '+1 day' );
+
+		$data = array(
+			'post_author'  => self::$user_ids['editor'],
+			'post_status'  => 'publish',
+			'post_content' => 'content',
+			'post_title'   => 'title',
+			'post_date'    => date_format( date_create( "@{$future_date}" ), 'Y-m-d H:i:s' ),
+		);
+
+		// Insert a post and make sure the ID is OK.
+		$post_id = wp_insert_post( $data );
+		$this->assertIsInt( $post_id );
+		$this->assertGreaterThan( 0, $post_id );
+
+		// Fetch the post and make sure it matches.
+		$post = get_post( $post_id );
+
+		$this->assertSame( $data['post_content'], $post->post_content );
+		$this->assertSame( $data['post_title'], $post->post_title );
+		$this->assertSame( 'future', $post->post_status );
+		$this->assertEquals( $data['post_author'], $post->post_author );
+		$this->assertSame( $data['post_date'], $post->post_date );
+
+		// There should be a publish_future_post hook scheduled on the future date.
+		$this->assertSame( $future_date, $this->next_schedule_for_post( 'publish_future_post', $post_id ) );
+	}
+
+	/**
+	 * Insert a post with a future date, and make sure the status and cron schedule are correct.
+	 */
+	public function test_vb_insert_future_over_dst() {
+		// Some magic days - one DST one not.
+		$future_date_1 = strtotime( 'June 21st +1 year' );
+		$future_date_2 = strtotime( 'Jan 11th +1 year' );
+
+		$data = array(
+			'post_author'  => self::$user_ids['editor'],
+			'post_status'  => 'publish',
+			'post_content' => 'content',
+			'post_title'   => 'title',
+			'post_date'    => date_format( date_create( "@{$future_date_1}" ), 'Y-m-d H:i:s' ),
+		);
+
+		// Insert a post and make sure the ID is OK.
+		$post_id = wp_insert_post( $data );
+
+		// Fetch the post and make sure has the correct date and status.
+		$post = get_post( $post_id );
+		$this->assertSame( 'future', $post->post_status );
+		$this->assertSame( $data['post_date'], $post->post_date );
+
+		// Check that there's a publish_future_post job scheduled at the right time.
+		$this->assertSame( $future_date_1, $this->next_schedule_for_post( 'publish_future_post', $post_id ) );
+
+		// Now save it again with a date further in the future.
+		$data['ID']            = $post_id;
+		$data['post_date']     = date_format( date_create( "@{$future_date_2}" ), 'Y-m-d H:i:s' );
+		$data['post_date_gmt'] = null;
+		wp_update_post( $data );
+
+		// Fetch the post again and make sure it has the new post_date.
+		$post = get_post( $post_id );
+		$this->assertSame( 'future', $post->post_status );
+		$this->assertSame( $data['post_date'], $post->post_date );
+
+		// And the correct date on the cron job.
+		$this->assertSame( $future_date_2, $this->next_schedule_for_post( 'publish_future_post', $post_id ) );
+	}
+
+	/**
+	 * Future post bug: posts get published at the wrong time if you edit the timestamp.
+	 *
+	 * @ticket 4710
+	 */
+	public function test_vb_insert_future_edit_bug() {
+		$future_date_1 = strtotime( '+1 day' );
+		$future_date_2 = strtotime( '+2 day' );
+
+		$data = array(
+			'post_author'  => self::$user_ids['editor'],
+			'post_status'  => 'publish',
+			'post_content' => 'content',
+			'post_title'   => 'title',
+			'post_date'    => date_format( date_create( "@{$future_date_1}" ), 'Y-m-d H:i:s' ),
+		);
+
+		// Insert a post and make sure the ID is OK.
+		$post_id = wp_insert_post( $data );
+
+		// Fetch the post and make sure has the correct date and status.
+		$post = get_post( $post_id );
+		$this->assertSame( 'future', $post->post_status );
+		$this->assertSame( $data['post_date'], $post->post_date );
+
+		// Check that there's a publish_future_post job scheduled at the right time.
+		$this->assertSame( $future_date_1, $this->next_schedule_for_post( 'publish_future_post', $post_id ) );
+
+		// Now save it again with a date further in the future.
+		$data['ID']            = $post_id;
+		$data['post_date']     = date_format( date_create( "@{$future_date_2}" ), 'Y-m-d H:i:s' );
+		$data['post_date_gmt'] = null;
+		wp_update_post( $data );
+
+		// Fetch the post again and make sure it has the new post_date.
+		$post = get_post( $post_id );
+		$this->assertSame( 'future', $post->post_status );
+		$this->assertSame( $data['post_date'], $post->post_date );
+
+		// And the correct date on the cron job.
+		$this->assertSame( $future_date_2, $this->next_schedule_for_post( 'publish_future_post', $post_id ) );
+	}
+
+	/**
+	 * Insert a draft post with a future date, and make sure no cron schedule is set.
+	 */
+	public function test_vb_insert_future_draft() {
+		$future_date = strtotime( '+1 day' );
+
+		$data = array(
+			'post_author'  => self::$user_ids['editor'],
+			'post_status'  => 'draft',
+			'post_content' => 'content',
+			'post_title'   => 'title',
+			'post_date'    => date_format( date_create( "@{$future_date}" ), 'Y-m-d H:i:s' ),
+		);
+
+		// Insert a post and make sure the ID is OK.
+		$post_id = wp_insert_post( $data );
+		$this->assertIsInt( $post_id );
+		$this->assertGreaterThan( 0, $post_id );
+
+		// Fetch the post and make sure it matches.
+		$post = get_post( $post_id );
+
+		$this->assertSame( $data['post_content'], $post->post_content );
+		$this->assertSame( $data['post_title'], $post->post_title );
+		$this->assertSame( 'draft', $post->post_status );
+		$this->assertEquals( $data['post_author'], $post->post_author );
+		$this->assertSame( $data['post_date'], $post->post_date );
+
+		// There should be a publish_future_post hook scheduled on the future date.
+		$this->assertFalse( $this->next_schedule_for_post( 'publish_future_post', $post_id ) );
+
+	}
+
+	/**
+	 * Insert a future post, then edit and change it to draft, and make sure cron gets it right.
+	 */
+	public function test_vb_insert_future_change_to_draft() {
+		$future_date_1 = strtotime( '+1 day' );
+
+		$data = array(
+			'post_author'  => self::$user_ids['editor'],
+			'post_status'  => 'publish',
+			'post_content' => 'content',
+			'post_title'   => 'title',
+			'post_date'    => date_format( date_create( "@{$future_date_1}" ), 'Y-m-d H:i:s' ),
+		);
+
+		// Insert a post and make sure the ID is OK.
+		$post_id = wp_insert_post( $data );
+
+		// Fetch the post and make sure has the correct date and status.
+		$post = get_post( $post_id );
+		$this->assertSame( 'future', $post->post_status );
+		$this->assertSame( $data['post_date'], $post->post_date );
+
+		// Check that there's a publish_future_post job scheduled at the right time.
+		$this->assertSame( $future_date_1, $this->next_schedule_for_post( 'publish_future_post', $post_id ) );
+
+		// Now save it again with status set to draft.
+		$data['ID']          = $post_id;
+		$data['post_status'] = 'draft';
+		wp_update_post( $data );
+
+		// Fetch the post again and make sure it has the new post_date.
+		$post = get_post( $post_id );
+		$this->assertSame( 'draft', $post->post_status );
+		$this->assertSame( $data['post_date'], $post->post_date );
+
+		// And the correct date on the cron job.
+		$this->assertFalse( $this->next_schedule_for_post( 'publish_future_post', $post_id ) );
+	}
+
+	/**
+	 * Insert a future post, then edit and change the status, and make sure cron gets it right.
+	 *
+	 * @dataProvider data_vb_insert_future_change_status
+	 */
+	public function test_vb_insert_future_change_status( $status ) {
+		$future_date_1 = strtotime( '+1 day' );
+
+		$data = array(
+			'post_author'  => self::$user_ids['editor'],
+			'post_status'  => 'publish',
+			'post_content' => "{$status}_content",
+			'post_title'   => "{$status}_title",
+			'post_date'    => date_format( date_create( "@{$future_date_1}" ), 'Y-m-d H:i:s' ),
+		);
+
+		// Insert a post and make sure the ID is OK.
+		$post_id = wp_insert_post( $data );
+
+		// Fetch the post and make sure has the correct date and status.
+		$post = get_post( $post_id );
+		$this->assertSame( 'future', $post->post_status );
+		$this->assertSame( $data['post_date'], $post->post_date );
+
+		// Check that there's a publish_future_post job scheduled at the right time.
+		$this->assertSame( $future_date_1, $this->next_schedule_for_post( 'publish_future_post', $post_id ) );
+
+		// Now save it again with status changed.
+		$data['ID']          = $post_id;
+		$data['post_status'] = $status;
+		wp_update_post( $data );
+
+		// Fetch the post again and make sure it has the new post_date.
+		$post = get_post( $post_id );
+		$this->assertSame( $status, $post->post_status );
+		$this->assertSame( $data['post_date'], $post->post_date );
+
+		// And the correct date on the cron job.
+		$this->assertFalse( $this->next_schedule_for_post( 'publish_future_post', $post_id ) );
+	}
+
+	public function data_vb_insert_future_change_status() {
+		$statuses = array(
+			'draft',
+			'static',
+			'object',
+			'attachment',
+			'inherit',
+			'pending',
+		);
+
+		return $this->text_array_to_dataprovider( $statuses );
+	}
+
+	/**
+	 * Insert a draft post with a future date, and make sure no cron schedule is set.
+	 */
+	public function test_vb_insert_future_private() {
+		$future_date = strtotime( '+1 day' );
+
+		$data = array(
+			'post_author'  => self::$user_ids['editor'],
+			'post_status'  => 'private',
+			'post_content' => 'content',
+			'post_title'   => 'title',
+			'post_date'    => date_format( date_create( "@{$future_date}" ), 'Y-m-d H:i:s' ),
+		);
+
+		// Insert a post and make sure the ID is OK.
+		$post_id = wp_insert_post( $data );
+		$this->assertIsInt( $post_id );
+		$this->assertGreaterThan( 0, $post_id );
+
+		// Fetch the post and make sure it matches.
+		$post = get_post( $post_id );
+
+		$this->assertSame( $data['post_content'], $post->post_content );
+		$this->assertSame( $data['post_title'], $post->post_title );
+		$this->assertSame( 'private', $post->post_status );
+		$this->assertEquals( $data['post_author'], $post->post_author );
+		$this->assertSame( $data['post_date'], $post->post_date );
+
+		// There should be a publish_future_post hook scheduled on the future date.
+		$this->assertFalse( $this->next_schedule_for_post( 'publish_future_post', $post_id ) );
+	}
+
+	/**
+	 * Insert a post with an invalid date, make sure it fails.
+	 *
+	 * @ticket 17180
+	 */
+	public function test_vb_insert_invalid_date() {
+		$data = array(
+			'post_author'  => self::$user_ids['editor'],
+			'post_status'  => 'publish',
+			'post_content' => 'content',
+			'post_title'   => 'title',
+			'post_date'    => '2012-02-30 00:00:00',
+		);
+
+		// Test both return paths with or without WP_Error.
+		$post_id = wp_insert_post( $data, true );
+		$this->assertWPError( $post_id );
+		$this->assertSame( 'invalid_date', $post_id->get_error_code() );
+
+		$post_id = wp_insert_post( $data );
+		$this->assertSame( 0, $post_id );
+	}
+
+	/**
+	 * Insert a future post, then edit and change it to private, and make sure cron gets it right.
+	 */
+	public function test_vb_insert_future_change_to_private() {
+		$future_date_1 = strtotime( '+1 day' );
+
+		$data = array(
+			'post_author'  => self::$user_ids['editor'],
+			'post_status'  => 'publish',
+			'post_content' => 'content',
+			'post_title'   => 'title',
+			'post_date'    => date_format( date_create( "@{$future_date_1}" ), 'Y-m-d H:i:s' ),
+		);
+
+		// Insert a post and make sure the ID is OK.
+		$post_id = wp_insert_post( $data );
+
+		// Fetch the post and make sure has the correct date and status.
+		$post = get_post( $post_id );
+		$this->assertSame( 'future', $post->post_status );
+		$this->assertSame( $data['post_date'], $post->post_date );
+
+		// Check that there's a publish_future_post job scheduled at the right time.
+		$this->assertSame( $future_date_1, $this->next_schedule_for_post( 'publish_future_post', $post_id ) );
+
+		// Now save it again with status set to draft.
+		$data['ID']          = $post_id;
+		$data['post_status'] = 'private';
+		wp_update_post( $data );
+
+		// Fetch the post again and make sure it has the new post_date.
+		$post = get_post( $post_id );
+		$this->assertSame( 'private', $post->post_status );
+		$this->assertSame( $data['post_date'], $post->post_date );
+
+		// And the correct date on the cron job.
+		$this->assertFalse( $this->next_schedule_for_post( 'publish_future_post', $post_id ) );
+	}
+
+	/**
+	 * @ticket 5305
+	 */
+	public function test_wp_insert_post_should_not_allow_a_bare_numeric_slug_that_might_conflict_with_a_date_archive_when_generating_from_an_empty_post_title() {
+		$this->set_permalink_structure( '/%postname%/' );
+
+		$post_id = wp_insert_post(
+			array(
+				'post_title'   => '',
+				'post_content' => 'test',
+				'post_status'  => 'publish',
+				'post_type'    => 'post',
+			)
+		);
+
+		$post = get_post( $post_id );
+
+		$this->assertSame( "$post_id-2", $post->post_name );
+	}
+
+	/**
+	 * @ticket 5305
+	 * @ticket 33392
+	 */
+	public function test_wp_insert_post_should_invalidate_post_cache_before_generating_guid_when_post_name_is_empty_and_is_generated_from_the_post_ID() {
+		register_post_type( 'wptests_pt' );
+
+		$post_id = wp_insert_post(
+			array(
+				'post_title'  => '',
+				'post_type'   => 'wptests_pt',
+				'post_status' => 'publish',
+			)
+		);
+
+		$post = get_post( $post_id );
+
+		$this->assertStringContainsString( 'wptests_pt=' . $post_id, $post->guid );
+	}
+
+	/**
+	 * @ticket 55877
+	 * @covers ::wp_insert_post
+	 */
+	public function test_wp_insert_post_should_not_trigger_warning_for_pending_posts_with_unknown_cpt() {
+		$post_id = wp_insert_post(
+			array(
+				'post_title'  => 'title',
+				'post_type'   => 'unknown',
+				'post_status' => 'pending',
+			)
+		);
+
+		$this->assertIsInt( $post_id );
+		$this->assertGreaterThan( 0, $post_id );
+	}
+
+	/**
+	 * @ticket 20451
+	 */
+	public function test_wp_insert_post_with_meta_input() {
+		$post_id = wp_insert_post(
+			array(
+				'post_title'   => '',
+				'post_content' => 'test',
+				'post_status'  => 'publish',
+				'post_type'    => 'post',
+				'meta_input'   => array(
+					'hello' => 'world',
+					'foo'   => 'bar',
+				),
+			)
+		);
+
+		$this->assertSame( 'world', get_post_meta( $post_id, 'hello', true ) );
+		$this->assertSame( 'bar', get_post_meta( $post_id, 'foo', true ) );
+	}
+
+	/**
+	 * "When I delete a future post using wp_delete_post( $post->ID ) it does not update the cron correctly."
+	 *
+	 * @ticket 5364
+	 * @covers ::wp_delete_post
+	 */
+	public function test_delete_future_post_cron() {
+		$future_date = strtotime( '+1 day' );
+
+		$data = array(
+			'post_author'  => self::$user_ids['editor'],
+			'post_status'  => 'publish',
+			'post_content' => 'content',
+			'post_title'   => 'title',
+			'post_date'    => date_format( date_create( "@{$future_date}" ), 'Y-m-d H:i:s' ),
+		);
+
+		// Insert a post and make sure the ID is OK.
+		$post_id = wp_insert_post( $data );
+
+		// Check that there's a publish_future_post job scheduled at the right time.
+		$this->assertSame( $future_date, $this->next_schedule_for_post( 'publish_future_post', $post_id ) );
+
+		// Now delete the post and make sure the cron entry is removed.
+		wp_delete_post( $post_id );
+
+		$this->assertFalse( $this->next_schedule_for_post( 'publish_future_post', $post_id ) );
+	}
+
+	/**
+	 * Bug: permalink doesn't work if post title is empty.
+	 *
+	 * Might only fail if the post ID is greater than four characters.
+	 *
+	 * @ticket 5305
+	 */
+	public function test_permalink_without_title() {
+		$this->set_permalink_structure( '/%year%/%monthnum%/%day%/%postname%/' );
+
+		$data = array(
+			'post_author'  => self::$user_ids['editor'],
+			'post_status'  => 'publish',
+			'post_content' => 'content',
+			'post_title'   => '',
+			'post_date'    => '2007-10-31 06:15:00',
+		);
+
+		// Insert a post and make sure the ID is OK.
+		$post_id = wp_insert_post( $data );
+
+		// Permalink should include the post ID at the end.
+		$expected = get_option( 'siteurl' ) . '/2007/10/31/' . $post_id . '/';
+		$this->assertSame( $expected, get_permalink( $post_id ) );
+	}
+
+	/**
+	 * @ticket 23708
+	 */
+	public function test_get_post_ancestors_within_loop() {
+		global $post;
+
+		$parent_id = self::factory()->post->create();
+		$post      = self::factory()->post->create_and_get(
+			array(
+				'post_parent' => $parent_id,
+			)
+		);
+
+		$this->assertSame( array( $parent_id ), get_post_ancestors( 0 ) );
+	}
+
+	/**
+	 * @ticket 23474
+	 * @covers ::wp_update_post
+	 */
+	public function test_update_invalid_post_id() {
+		$post_id = self::factory()->post->create();
+		$post    = get_post( $post_id, ARRAY_A );
+
+		$post['ID'] = 123456789;
+
+		$this->assertSame( 0, wp_insert_post( $post ) );
+		$this->assertSame( 0, wp_update_post( $post ) );
+
+		$this->assertInstanceOf( 'WP_Error', wp_insert_post( $post, true ) );
+		$this->assertInstanceOf( 'WP_Error', wp_update_post( $post, true ) );
+
+	}
+
+	/**
+	 * @ticket 19373
+	 */
+	public function test_insert_programmatic_sanitized() {
+		$this->unset_current_user();
+
+		register_taxonomy( 'test_tax', 'post' );
+
+		$title = 'title';
+		$data  = array(
+			'post_author'  => self::$user_ids['editor'],
+			'post_status'  => 'publish',
+			'post_content' => 'content',
+			'post_title'   => $title,
+			'tax_input'    => array(
+				'test_tax' => array( 'term', 'term2', 'term3' ),
+			),
+		);
+
+		$post_id = wp_insert_post( $data, true, true );
+		$this->assertIsInt( $post_id );
+		$this->assertGreaterThan( 0, $post_id );
+
+		$post = get_post( $post_id );
+		$this->assertEquals( self::$user_ids['editor'], $post->post_author );
+		$this->assertSame( $title, $post->post_title );
+	}
+
+	/**
+	 * @ticket 31168
+	 */
+	public function test_wp_insert_post_default_comment_ping_status_open() {
+		$post_id = self::factory()->post->create(
+			array(
+				'post_author'  => self::$user_ids['editor'],
+				'post_status'  => 'publish',
+				'post_content' => 'content',
+				'post_title'   => 'title',
+			)
+		);
+		$post    = get_post( $post_id );
+
+		$this->assertSame( 'open', $post->comment_status );
+		$this->assertSame( 'open', $post->ping_status );
+	}
+
+	/**
+	 * @ticket 31168
+	 */
+	public function test_wp_insert_post_page_default_comment_ping_status_closed() {
+		$post_id = self::factory()->post->create(
+			array(
+				'post_author'  => self::$user_ids['editor'],
+				'post_status'  => 'publish',
+				'post_content' => 'content',
+				'post_title'   => 'title',
+				'post_type'    => 'page',
+			)
+		);
+		$post    = get_post( $post_id );
+
+		$this->assertSame( 'closed', $post->comment_status );
+		$this->assertSame( 'closed', $post->ping_status );
+	}
+
+	/**
+	 * @ticket 31168
+	 */
+	public function test_wp_insert_post_cpt_default_comment_ping_status_open() {
+		$post_type = rand_str( 20 );
+		register_post_type( $post_type, array( 'supports' => array( 'comments', 'trackbacks' ) ) );
+
+		$post_id = self::factory()->post->create(
+			array(
+				'post_author'  => self::$user_ids['editor'],
+				'post_status'  => 'publish',
+				'post_content' => rand_str(),
+				'post_title'   => rand_str(),
+				'post_type'    => $post_type,
+			)
+		);
+		$post    = get_post( $post_id );
+
+		_unregister_post_type( $post_type );
+
+		$this->assertSame( 'open', $post->comment_status );
+		$this->assertSame( 'open', $post->ping_status );
+	}
+
+	/**
+	 * @ticket 31168
+	 */
+	public function test_wp_insert_post_cpt_default_comment_ping_status_closed() {
+		$post_type = rand_str( 20 );
+		register_post_type( $post_type );
+
+		$post_id = self::factory()->post->create(
+			array(
+				'post_author'  => self::$user_ids['editor'],
+				'post_status'  => 'publish',
+				'post_content' => rand_str(),
+				'post_title'   => rand_str(),
+				'post_type'    => $post_type,
+			)
+		);
+		$post    = get_post( $post_id );
+
+		_unregister_post_type( $post_type );
+
+		$this->assertSame( 'closed', $post->comment_status );
+		$this->assertSame( 'closed', $post->ping_status );
+	}
+
+	/**
+	 * If a post is updated without providing a post_name param,
+	 * a new slug should not be generated.
+	 *
+	 * @ticket 34865
+	 */
+	public function test_post_updates_without_slug_provided() {
+		$post_id = self::factory()->post->create(
+			array(
+				'post_title'  => 'Stuff',
+				'post_status' => 'publish',
+			)
+		);
+
+		$data = array(
+			'ID'         => $post_id,
+			'post_title' => 'Stuff and Things',
+		);
+
+		wp_insert_post( $data );
+
+		$updated_post = get_post( $post_id );
+		// Ensure changing the post_title didn't modify the post_name.
+		$this->assertSame( 'stuff', $updated_post->post_name );
+	}
+
+	/**
+	 * @ticket 32585
+	 */
+	public function test_wp_insert_post_author_zero() {
+		$post_id = self::factory()->post->create( array( 'post_author' => 0 ) );
+
+		$this->assertEquals( 0, get_post( $post_id )->post_author );
+	}
+
+	/**
+	 * @ticket 32585
+	 */
+	public function test_wp_insert_post_author_null() {
+		wp_set_current_user( self::$user_ids['editor'] );
+
+		$post_id = self::factory()->post->create( array( 'post_author' => null ) );
+
+		$this->assertEquals( self::$user_ids['editor'], get_post( $post_id )->post_author );
+	}
+
+	/**
+	 * @ticket 15946
+	 */
+	public function test_wp_insert_post_should_respect_post_date_gmt() {
+		$data = array(
+			'post_author'   => self::$user_ids['editor'],
+			'post_status'   => 'publish',
+			'post_content'  => 'content',
+			'post_title'    => 'title',
+			'post_date_gmt' => '2014-01-01 12:00:00',
+		);
+
+		// Insert a post and make sure the ID is OK.
+		$post_id = wp_insert_post( $data );
+
+		$post = get_post( $post_id );
+
+		$this->assertSame( $data['post_content'], $post->post_content );
+		$this->assertSame( $data['post_title'], $post->post_title );
+		$this->assertEquals( $data['post_author'], $post->post_author );
+		$this->assertSame( get_date_from_gmt( $data['post_date_gmt'] ), $post->post_date );
+		$this->assertSame( $data['post_date_gmt'], $post->post_date_gmt );
+	}
+
+	/**
+	 * Test ensuring that the post_name (UUID) is preserved when wp_insert_post()/wp_update_post() is called.
+	 *
+	 * @see _wp_customize_changeset_filter_insert_post_data()
+	 * @ticket 30937
+	 */
+	public function test_wp_insert_post_for_customize_changeset_should_not_drop_post_name() {
+		$this->assertSame( 10, has_filter( 'wp_insert_post_data', '_wp_customize_changeset_filter_insert_post_data' ) );
+
+		$changeset_data = array(
+			'blogname' => array(
+				'value' => 'Hello World',
+			),
+		);
+
+		wp_set_current_user( self::$user_ids['contributor'] );
+
+		$uuid    = wp_generate_uuid4();
+		$post_id = wp_insert_post(
+			array(
+				'post_type'    => 'customize_changeset',
+				'post_name'    => strtoupper( $uuid ),
+				'post_content' => wp_json_encode( $changeset_data ),
+			)
+		);
+		$this->assertSame( $uuid, get_post( $post_id )->post_name, 'Expected lower-case UUID4 to be inserted.' );
+		$this->assertSame( $changeset_data, json_decode( get_post( $post_id )->post_content, true ) );
+
+		$changeset_data['blogname']['value'] = 'Hola Mundo';
+		wp_update_post(
+			array(
+				'ID'           => $post_id,
+				'post_status'  => 'draft',
+				'post_content' => wp_json_encode( $changeset_data ),
+			)
+		);
+		$this->assertSame( $uuid, get_post( $post_id )->post_name, 'Expected post_name to not have been dropped for drafts.' );
+		$this->assertSame( $changeset_data, json_decode( get_post( $post_id )->post_content, true ) );
+
+		$changeset_data['blogname']['value'] = 'Hallo Welt';
+		wp_update_post(
+			array(
+				'ID'           => $post_id,
+				'post_status'  => 'pending',
+				'post_content' => wp_json_encode( $changeset_data ),
+			)
+		);
+		$this->assertSame( $uuid, get_post( $post_id )->post_name, 'Expected post_name to not have been dropped for pending.' );
+		$this->assertSame( $changeset_data, json_decode( get_post( $post_id )->post_content, true ) );
+	}
+
+	/**
+	 * @ticket 48113
+	 */
+	public function test_insert_post_should_respect_date_floating_post_status_arg() {
+		register_post_status( 'floating', array( 'date_floating' => true ) );
+
+		$post_id = self::factory()->post->create(
+			array(
+				'post_status'   => 'floating',
+				'post_date'     => null,
+				'post_date_gmt' => null,
+			)
+		);
+
+		$post = get_post( $post_id );
+		self::assertSame( '0000-00-00 00:00:00', $post->post_date_gmt );
+	}
+
+	/**
+	 * @ticket 48113
+	 */
+	public function test_insert_post_should_respect_date_floating_post_status_arg_not_set() {
+		register_post_status( 'not-floating', array( 'date_floating' => false ) );
+
+		$post_id = self::factory()->post->create(
+			array(
+				'post_status'   => 'floating',
+				'post_date'     => null,
+				'post_date_gmt' => null,
+			)
+		);
+
+		$post = get_post( $post_id );
+		self::assertEqualsWithDelta(
+			strtotime( gmdate( 'Y-m-d H:i:s' ) ),
+			strtotime( $post->post_date_gmt ),
+			2,
+			'The dates should be equal'
+		);
+	}
+
+	/**
+	 * Test ensuring that wp_update_post() does not unintentionally modify post tags
+	 * if the post has several tags with the same name but different slugs.
+	 *
+	 * Tags should only be modified if 'tags_input' parameter was explicitly provided,
+	 * and is different from the existing tags.
+	 *
+	 * @ticket 45121
+	 * @covers ::wp_update_post
+	 */
+	public function test_update_post_should_only_modify_post_tags_if_different_tags_input_was_provided() {
+		$tag_1 = wp_insert_term( 'wp_update_post_tag', 'post_tag', array( 'slug' => 'wp_update_post_tag_1' ) );
+		$tag_2 = wp_insert_term( 'wp_update_post_tag', 'post_tag', array( 'slug' => 'wp_update_post_tag_2' ) );
+		$tag_3 = wp_insert_term( 'wp_update_post_tag', 'post_tag', array( 'slug' => 'wp_update_post_tag_3' ) );
+
+		$post_id = self::factory()->post->create(
+			array(
+				'tags_input' => array( $tag_1['term_id'], $tag_2['term_id'] ),
+			)
+		);
+
+		$post = get_post( $post_id );
+
+		$tags = wp_get_post_tags( $post->ID, array( 'fields' => 'ids' ) );
+		$this->assertSameSets( array( $tag_1['term_id'], $tag_2['term_id'] ), $tags );
+
+		wp_update_post( $post );
+
+		$tags = wp_get_post_tags( $post->ID, array( 'fields' => 'ids' ) );
+		$this->assertSameSets( array( $tag_1['term_id'], $tag_2['term_id'] ), $tags );
+
+		wp_update_post(
+			array(
+				'ID'         => $post->ID,
+				'tags_input' => array( $tag_2['term_id'], $tag_3['term_id'] ),
+			)
+		);
+
+		$tags = wp_get_post_tags( $post->ID, array( 'fields' => 'ids' ) );
+		$this->assertSameSets( array( $tag_2['term_id'], $tag_3['term_id'] ), $tags );
+	}
+
+	/**
+	 * @ticket 52187
+	 */
+	public function test_insert_empty_post_date() {
+		$post_date_gmt = '2020-12-29 10:11:45';
+		$invalid_date  = '2020-12-41 14:15:27';
+
+		// Empty post_date_gmt with floating status
+		$post_id = self::factory()->post->create(
+			array(
+				'post_status' => 'draft',
+			)
+		);
+		$post    = get_post( $post_id );
+		$this->assertEqualsWithDelta(
+			strtotime( gmdate( 'Y-m-d H:i:s' ) ),
+			strtotime( $post->post_date ),
+			2,
+			'The dates should be equal'
+		);
+		$this->assertSame( '0000-00-00 00:00:00', $post->post_date_gmt );
+
+		$post_id = self::factory()->post->create(
+			array(
+				'post_date_gmt' => '0000-00-00 00:00:00',
+				'post_status'   => 'draft',
+			)
+		);
+		$post    = get_post( $post_id );
+		$this->assertEqualsWithDelta(
+			strtotime( gmdate( 'Y-m-d H:i:s' ) ),
+			strtotime( $post->post_date ),
+			2,
+			'The dates should be equal'
+		);
+		$this->assertSame( '0000-00-00 00:00:00', $post->post_date_gmt );
+
+		// Empty post_date_gmt without floating status
+		$post_id = self::factory()->post->create(
+			array(
+				'post_status' => 'publish',
+			)
+		);
+		$post    = get_post( $post_id );
+		$this->assertEqualsWithDelta(
+			strtotime( gmdate( 'Y-m-d H:i:s' ) ),
+			strtotime( $post->post_date ),
+			2,
+			'The dates should be equal'
+		);
+		$this->assertEqualsWithDelta(
+			strtotime( gmdate( 'Y-m-d H:i:s' ) ),
+			strtotime( get_gmt_from_date( $post->post_date ) ),
+			2,
+			'The dates should be equal'
+		);
+
+		$post_id = self::factory()->post->create(
+			array(
+				'post_date_gmt' => '0000-00-00 00:00:00',
+				'post_status'   => 'publish',
+			)
+		);
+		$post    = get_post( $post_id );
+		$this->assertEqualsWithDelta(
+			strtotime( gmdate( 'Y-m-d H:i:s' ) ),
+			strtotime( $post->post_date ),
+			2,
+			'The dates should be equal'
+		);
+		$this->assertEqualsWithDelta(
+			strtotime( gmdate( 'Y-m-d H:i:s' ) ),
+			strtotime( get_gmt_from_date( $post->post_date ) ),
+			2,
+			'The dates should be equal'
+		);
+
+		// Valid post_date_gmt
+		$post_id = self::factory()->post->create(
+			array(
+				'post_date_gmt' => $post_date_gmt,
+			)
+		);
+		$post    = get_post( $post_id );
+		$this->assertSame( get_date_from_gmt( $post_date_gmt ), $post->post_date );
+		$this->assertSame( $post_date_gmt, $post->post_date_gmt );
+
+		// Invalid post_date_gmt
+		$post_id = self::factory()->post->create(
+			array(
+				'post_date_gmt' => $invalid_date,
+			)
+		);
+		$post    = get_post( $post_id );
+		$this->assertSame( '1970-01-01 00:00:00', $post->post_date );
+		$this->assertSame( '0000-00-00 00:00:00', $post->post_date_gmt );
+	}
+
+	/**
+	 * @ticket 52187
+	 */
+	public function test_insert_valid_post_date() {
+		$post_date     = '2020-12-28 11:26:35';
+		$post_date_gmt = '2020-12-29 10:11:45';
+		$invalid_date  = '2020-12-41 14:15:27';
+
+		// Empty post_date_gmt with floating status
+		$post_id = self::factory()->post->create(
+			array(
+				'post_date'   => $post_date,
+				'post_status' => 'draft',
+			)
+		);
+		$post    = get_post( $post_id );
+		$this->assertSame( $post_date, $post->post_date );
+		$this->assertSame( '0000-00-00 00:00:00', $post->post_date_gmt );
+
+		$post_id = self::factory()->post->create(
+			array(
+				'post_date'     => $post_date,
+				'post_date_gmt' => '0000-00-00 00:00:00',
+				'post_status'   => 'draft',
+			)
+		);
+		$post    = get_post( $post_id );
+		$this->assertSame( $post_date, $post->post_date );
+		$this->assertSame( '0000-00-00 00:00:00', $post->post_date_gmt );
+
+		// Empty post_date_gmt without floating status
+		$post_id = self::factory()->post->create(
+			array(
+				'post_date'   => $post_date,
+				'post_status' => 'publish',
+			)
+		);
+		$post    = get_post( $post_id );
+		$this->assertSame( $post_date, $post->post_date );
+		$this->assertSame( get_gmt_from_date( $post_date ), $post->post_date_gmt );
+
+		$post_id = self::factory()->post->create(
+			array(
+				'post_date'     => $post_date,
+				'post_date_gmt' => '0000-00-00 00:00:00',
+				'post_status'   => 'publish',
+			)
+		);
+		$post    = get_post( $post_id );
+		$this->assertSame( $post_date, $post->post_date );
+		$this->assertSame( get_gmt_from_date( $post_date ), $post->post_date_gmt );
+
+		// Valid post_date_gmt
+		$post_id = self::factory()->post->create(
+			array(
+				'post_date'     => $post_date,
+				'post_date_gmt' => $post_date_gmt,
+			)
+		);
+		$post    = get_post( $post_id );
+		$this->assertSame( $post_date, $post->post_date );
+		$this->assertSame( $post_date_gmt, $post->post_date_gmt );
+
+		// Invalid post_date_gmt
+		$post_id = self::factory()->post->create(
+			array(
+				'post_date'     => $post_date,
+				'post_date_gmt' => $invalid_date,
+			)
+		);
+		$post    = get_post( $post_id );
+		$this->assertSame( $post_date, $post->post_date );
+		$this->assertSame( '0000-00-00 00:00:00', $post->post_date_gmt );
+	}
+
+	/**
+	 * @ticket 52187
+	 */
+	public function test_insert_invalid_post_date() {
+		$post_date     = '2020-12-28 11:26:35';
+		$post_date_gmt = '2020-12-29 10:11:45';
+		$invalid_date  = '2020-12-41 14:15:27';
+
+		// Empty post_date_gmt with floating status
+		$post_id = self::factory()->post->create(
+			array(
+				'post_date'   => $invalid_date,
+				'post_status' => 'draft',
+			)
+		);
+		$this->assertSame( 0, $post_id );
+
+		$post_id = self::factory()->post->create(
+			array(
+				'post_date'     => $invalid_date,
+				'post_date_gmt' => '0000-00-00 00:00:00',
+				'post_status'   => 'draft',
+			)
+		);
+		$this->assertSame( 0, $post_id );
+
+		// Empty post_date_gmt without floating status
+		$post_id = self::factory()->post->create(
+			array(
+				'post_date'   => $invalid_date,
+				'post_status' => 'publish',
+			)
+		);
+		$this->assertSame( 0, $post_id );
+
+		$post_id = self::factory()->post->create(
+			array(
+				'post_date'     => $invalid_date,
+				'post_date_gmt' => '0000-00-00 00:00:00',
+				'post_status'   => 'publish',
+			)
+		);
+		$this->assertSame( 0, $post_id );
+
+		// Valid post_date_gmt
+		$post_id = self::factory()->post->create(
+			array(
+				'post_date'     => $invalid_date,
+				'post_date_gmt' => $post_date_gmt,
+			)
+		);
+		$this->assertSame( 0, $post_id );
+
+		// Invalid post_date_gmt
+		$post_id = self::factory()->post->create(
+			array(
+				'post_date'     => $invalid_date,
+				'post_date_gmt' => $invalid_date,
+			)
+		);
+		$this->assertSame( 0, $post_id );
+	}
+
 	/**
 	 * @ticket 11863
 	 */