Add test for PHPOffice#2868 Fix mb_substr with null to parameter depr…

…ecation message (PHP 8.1)
yblatti · Jun 2, 2022 · 7c6cab1 · 7c6cab1
1 parent c619897
commit 7c6cab1
Showing 1 changed file with 17 additions and 0 deletions.
diff --git a/tests/PhpSpreadsheetTests/Shared/StringHelperTest.php b/tests/PhpSpreadsheetTests/Shared/StringHelperTest.php
@@ -119,4 +119,21 @@ public function testSYLKtoUTF8(): void
 
         self::assertEquals($expectedResult, $result);
     }
+
+    public function testSubstringUTF8(): void
+    {
+        $expectedResult = '😀';
+        $result = StringHelper::substring('🙃😀🙃', 1, 1);
+
+        self::assertEquals($expectedResult, $result);
+    }
+
+    public function testSubstringWithNull(): void
+    {
+        // Issue #2868 PHP 8.1 Deprecation message for null value
+        $expectedResult = '';
+        $result = StringHelper::substring(null, 1, 10);
+
+        self::assertEquals($expectedResult, $result);
+    }
 }