Fix tests

src/Cron_Event_Command.php

@@ -307,28 +307,44 @@ public function unschedule( $args, $assoc_args ) {
 
 		list( $hook ) = $args;
 
-		$unscheduled = wp_unschedule_hook( $hook );
-
-		if ( empty( $unscheduled ) ) {
-			$message = 'Failed to unschedule events for hook \'%1\$s.';
-
-			// If 0 event found on hook.
-			if ( 0 === $unscheduled ) {
-				$message = "No events found for hook '%1\$s'.";
+		// Count events before unscheduling for WP < 5.1 compatibility where
+		// wp_unschedule_hook() returns null instead of the event count.
+		$crons       = _get_cron_array();
+		$event_count = 0;
+		if ( is_array( $crons ) ) {
+			foreach ( $crons as $cron ) {
+				if ( ! is_array( $cron ) ) {
+					continue;
+				}
+				/**
+				 * @var array<string, array<mixed>> $cron
+				 */
+				if ( isset( $cron[ $hook ] ) ) {
+					$event_count += count( $cron[ $hook ] );
+				}
 			}
+		}
+
+		if ( 0 === $event_count ) {
+			WP_CLI::error( sprintf( "No events found for hook '%s'.", $hook ) );
+		}
 
-			WP_CLI::error( sprintf( $message, $hook ) );
+		$unscheduled = wp_unschedule_hook( $hook );
 
-		} else {
-			WP_CLI::success(
-				sprintf(
-					'Unscheduled %1$d %2$s for hook \'%3$s\'.',
-					$unscheduled,
-					Utils\pluralize( 'event', $unscheduled ),
-					$hook
-				)
-			);
+		if ( false === $unscheduled ) {
+			WP_CLI::error( sprintf( "Failed to unschedule events for hook '%s'.", $hook ) );
 		}
+
+		$count = ( is_int( $unscheduled ) && $unscheduled > 0 ) ? $unscheduled : $event_count;
+
+		WP_CLI::success(
+			sprintf(
+				'Unscheduled %1$d %2$s for hook \'%3$s\'.',
+				$count,
+				Utils\pluralize( 'event', $count ),
+				$hook
+			)
+		);
 	}
 
 	/**
@@ -562,7 +578,7 @@ protected static function get_selected_cron_events( $args, $assoc_args ) {
 			WP_CLI::error( 'Please use either --due-now or --all.' );
 		}
 
-		$events = self::get_cron_events();
+		$events = self::get_cron_events( $due_now );
 
 		if ( is_wp_error( $events ) ) {
 			return $events;