Tests: Cover post_lock_window in wp_heartbeat_set_suspension().

Add coverage for the heartbeat setting exposed in [r/PR WordPress#11732]:

- post_lock_window is set to the default 150 on post.php and post-new.php.
- post_lock_window is omitted on non-post screens (index.php, edit.php).
- post_lock_window reflects the wp_check_post_lock_window filter value.

See #65171.

Author: adamsilverstein

tests/phpunit/tests/admin/includes/misc/WpHeartbeatSetSuspension_Test.php

@@ -79,4 +79,89 @@ public function data_wp_heartbeat_set_suspension(): array {
 			),
 		);
 	}
+
+	/**
+	 * Tests that wp_heartbeat_set_suspension() exposes the default post lock window on post screens.
+	 *
+	 * @dataProvider data_post_screens
+	 *
+	 * @ticket 65171
+	 *
+	 * @param string $pagenow_value The value for the $pagenow global.
+	 */
+	public function test_wp_heartbeat_set_suspension_sets_post_lock_window_on_post_screens( $pagenow_value ) {
+		global $pagenow;
+
+		$pagenow = $pagenow_value;
+
+		$result = wp_heartbeat_set_suspension( array() );
+
+		$this->assertArrayHasKey( 'post_lock_window', $result, "'post_lock_window' should be present when \$pagenow is {$pagenow_value}." );
+		$this->assertSame( 150, $result['post_lock_window'], "'post_lock_window' should default to 150 when \$pagenow is {$pagenow_value}." );
+	}
+
+	/**
+	 * Tests that wp_heartbeat_set_suspension() does not expose a post lock window on non-post screens.
+	 *
+	 * @dataProvider data_non_post_screens
+	 *
+	 * @ticket 65171
+	 *
+	 * @param string $pagenow_value The value for the $pagenow global.
+	 */
+	public function test_wp_heartbeat_set_suspension_does_not_set_post_lock_window_on_other_screens( $pagenow_value ) {
+		global $pagenow;
+
+		$pagenow = $pagenow_value;
+
+		$result = wp_heartbeat_set_suspension( array() );
+
+		$this->assertArrayNotHasKey( 'post_lock_window', $result, "'post_lock_window' should not be set when \$pagenow is {$pagenow_value}." );
+	}
+
+	/**
+	 * Tests that wp_heartbeat_set_suspension() honors the wp_check_post_lock_window filter.
+	 *
+	 * @ticket 65171
+	 */
+	public function test_wp_heartbeat_set_suspension_post_lock_window_respects_filter() {
+		global $pagenow;
+
+		$pagenow = 'post.php';
+
+		add_filter(
+			'wp_check_post_lock_window',
+			static function () {
+				return 60;
+			}
+		);
+
+		$result = wp_heartbeat_set_suspension( array() );
+
+		$this->assertSame( 60, $result['post_lock_window'], "'post_lock_window' should reflect the wp_check_post_lock_window filter value." );
+	}
+
+	/**
+	 * Data provider: $pagenow values for the Add/Edit Post screens.
+	 *
+	 * @return array<string, array{pagenow_value: string}>
+	 */
+	public function data_post_screens(): array {
+		return array(
+			'post.php'     => array( 'pagenow_value' => 'post.php' ),
+			'post-new.php' => array( 'pagenow_value' => 'post-new.php' ),
+		);
+	}
+
+	/**
+	 * Data provider: $pagenow values for screens that are not Add/Edit Post.
+	 *
+	 * @return array<string, array{pagenow_value: string}>
+	 */
+	public function data_non_post_screens(): array {
+		return array(
+			'index.php' => array( 'pagenow_value' => 'index.php' ),
+			'edit.php'  => array( 'pagenow_value' => 'edit.php' ),
+		);
+	}
 }