Posts, Post Types: Ensure that all post stati are countable in wp_count_posts.

When `wp_count_posts()` is cached, it does so with all statuses defaulted to 0. The problem is however, if this is called before all plugins have registered their desired statuses, they won't have that default.

Fixes #49685.

Props obliviousharmony, SergeyBiryukov.



git-svn-id: https://develop.svn.wordpress.org/trunk@48497 602fd350-edb4-49c9-b593-d223f7449a82

tests/phpunit/tests/post.php

@@ -879,6 +879,22 @@ class Tests_Post extends WP_UnitTestCase {
 		$this->assertNotEquals( $initial_counts->publish, $after_trash_counts->publish );
 	}
 
+	/**
+	 * @ticket 49685
+	 */
+	function test_wp_count_posts_status_changes_visible() {
+		self::factory()->post->create_many( 3 );
+
+		// Trigger a cache.
+		wp_count_posts();
+
+		register_post_status( 'test' );
+
+		$counts = wp_count_posts();
+		$this->assertTrue( isset( $counts->test ) );
+		$this->assertEquals( 0, $counts->test );
+	}
+
 	/**
 	 * @ticket 13771
 	 */