Remove null check from constructor

Author: vermakhushboo

src/Validator/Multiple.php

@@ -28,17 +28,15 @@ class Multiple extends Validator
      * Example:
      *
      * $multiple = new Multiple([$validator1, $validator2]);
-     * $multiple = new Multiple([$validator1, $validator2, $validator3], SELF::TYPE_STRING);
+     * $multiple = new Multiple([$validator1, $validator2, $validator3], self::TYPE_STRING);
      */
-    public function __construct(array $rules, ?string $type = null)
+    public function __construct(array $rules, ?string $type = self::TYPE_MIXED)
     {
         foreach ($rules as $rule) {
             $this->addRule($rule);
         }
 
-        if ($type !== null) {
-            $this->type = $type;
-        }
+        $this->type = $type;
     }
     /**
      * Add rule

tests/Validator/MultipleTest.php

@@ -10,11 +10,12 @@ class MultipleTest extends TestCase
 
     public function setUp(): void
     {
-        $this->validator = new Multiple([new Text(20), new URL()]);
+        $this->validator = new Multiple([new Text(20), new URL()], Multiple::TYPE_STRING);
     }
 
     public function testIsValid()
     {
+        $this->assertEquals('string', $this->validator->getType());
         $this->assertEquals("1. Value must be a valid string and at least 1 chars and no longer than 20 chars \n2. Value must be a valid URL \n", $this->validator->getDescription());
 
         // Valid URL but invalid text length