From fd1ad653950ca44478be7f4e3394da28e5f25fb4 Mon Sep 17 00:00:00 2001
From: Sergei Morozov <morozov@tut.by>
Date: Sat, 17 Aug 2024 15:22:56 -0700
Subject: [PATCH] Add support for empty test result

---
 tests/TestUtil.php | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/tests/TestUtil.php b/tests/TestUtil.php
index ba54b07fd4..eb6b64657b 100644
--- a/tests/TestUtil.php
+++ b/tests/TestUtil.php
@@ -19,8 +19,10 @@
 use InvalidArgumentException;
 use PHPUnit\Framework\Assert;
 
+use function array_fill;
 use function array_map;
 use function assert;
+use function count;
 use function extension_loaded;
 use function file_exists;
 use function implode;
@@ -269,16 +271,30 @@ public static function isDriverOneOf(string ...$names): bool
      */
     public static function generateResultSetQuery(array $columnNames, array $rows, AbstractPlatform $platform): string
     {
-        return implode(' UNION ALL ', array_map(static function (array $row) use ($columnNames, $platform): string {
+        $isEmpty = count($rows) === 0;
+
+        if ($isEmpty) {
+            $rows = [array_fill(0, count($columnNames), null)];
+        }
+
+        $query = implode(' UNION ALL ', array_map(static function (array $row) use ($columnNames, $platform): string {
             return $platform->getDummySelectSQL(
                 implode(', ', array_map(static function (string $column, $value) use ($platform): string {
                     if (is_string($value)) {
                         $value = $platform->quoteStringLiteral($value);
+                    } elseif ($value === null) {
+                        $value = 'NULL';
                     }
 
                     return $value . ' ' . $platform->quoteIdentifier($column);
                 }, $columnNames, $row)),
             );
         }, $rows));
+
+        if ($isEmpty) {
+            $query .= ' WHERE NULL IS NOT NULL';
+        }
+
+        return $query;
     }
 }