Handle same-day date range edge case in generate_batch_dates()

Author: layoutd

includes/Generator/Order.php

@@ -846,6 +846,11 @@ protected static function generate_batch_dates( $count, $args ) {
 		$end_timestamp   = strtotime( $end );
 		$days_between    = (int) ( ( $end_timestamp - $start_timestamp ) / DAY_IN_SECONDS );
 
+		// If start and end dates are the same, return array of that date
+		if ( 0 === $days_between ) {
+			return array_fill( 0, $count, date( 'Y-m-d', $start_timestamp ) );
+		}
+
 		$dates = array();
 		for ( $i = 0; $i < $count; $i++ ) {
 			$random_days = wp_rand( 0, $days_between );