test validator method

Author: SecondeJK

src/OpenTok/Util/Validators.php

@@ -423,7 +423,7 @@ public static function validateDTMFDigits(string $digits): void
     // Helpers
 
     // credit: http://stackoverflow.com/a/173479
-    protected static function isAssoc($arr): bool
+    public static function isAssoc($arr): bool
     {
         if (array() === $arr) {
             return false;

tests/OpenTokTest/Validators/ValidatorsTest.php

@@ -23,6 +23,30 @@ public function testWillPassCorrectPayload(): void
         Validators::validateForceMuteAllOptions($options);
     }
 
+    public function testIsAssocWithValidArray(): void
+    {
+        $haystack = [
+            'one' => '1',
+            'two' => '2',
+            'three' => '3',
+            'four' => '4'
+        ];
+
+        $this->assertTrue(Validators::isAssoc($haystack));
+    }
+
+    public function testIsAssocWithInvalidArray(): void
+    {
+        $haystack = [
+            'one',
+            'two',
+            'three',
+            'four'
+        ];
+
+        $this->assertFalse(Validators::isAssoc($haystack));
+    }
+
     public function testWillFailWhenStreamIdsAreNotCorrect(): void
     {
         $this->expectException(InvalidArgumentException::class);