Ticket #39055: 39055_tests_current_behavior_refresh.diff

tests/phpunit/tests/query/results.php

@@ -365 +365 @@
                 ), wp_list_pluck( $posts, 'post_title' ) );
         }
 
+  /**
+   * @ticket 39055
+   */
+  function test_query_orderby_post__in_with_no_order_specified() {
+    $post__in_array = array( self::$post_ids[2], self::$post_ids[0], self::$post_ids[1] );
+    $expected_returned_array = array( self::$post_ids[0], self::$post_ids[1], self::$post_ids[2] );
+
+    $q = new WP_Query( array(
+        'post__in' => $post__in_array,
+        'orderby'  => 'post__in',
+        'fields'   => 'ids'
+    ) );
+
+    // Expect post ids from lower to higher value (default ASC) when no 'order' param is passed in
+    $this->assertSame( $expected_returned_array, $q->posts );
+  }
+
+  /**
+   * @ticket 39055
+   */
+  function test_query_orderby_post__in_with_order_asc() {
+    $post__in_array = array( self::$post_ids[2], self::$post_ids[1], self::$post_ids[0] );
+    $expected_returned_array = array( self::$post_ids[0], self::$post_ids[1], self::$post_ids[2] );
+
+    $q = new WP_Query( array(
+        'post__in' => $post__in_array,
+        'orderby'  => 'post__in',
+        'order'    => 'asc',
+        'fields'   => 'ids'
+    ) );
+
+    // Expect post ids from lower to higher value when order=asc is passed in
+    $this->assertSame( $expected_returned_array, $q->posts );
+   }
+
+  /**
+   * @ticket 39055
+   */
+  function test_query_orderby_post__in_with_order_desc() {
+    $post__in_array = array( self::$post_ids[1], self::$post_ids[2], self::$post_ids[0] );
+    // Even if the input post__in array is not sorted, results are returned in sorted order
+    $expected_returned_array = array( self::$post_ids[2], self::$post_ids[1], self::$post_ids[0] );
+
+    $q = new WP_Query( array(
+        'post__in' => $post__in_array,
+        'orderby'  => 'post__in',
+        'order'    => 'desc',
+        'fields'   => 'ids'
+    ) );
+
+    // Expect post ids from higher to lower value when order=desc is passed in
+    $this->assertSame( $expected_returned_array, $q->posts );
+  }
+
         /**
          * @ticket 27252
          * @ticket 31194