Merge branch 'hotfix/4047'

Close zendframework/zendframework#4047

src/InArray.php

@@ -75,7 +75,7 @@ class InArray extends AbstractValidator
      */
     public function getHaystack()
     {
-        if ($this->haystack == null) {
+        if ($this->haystack === null) {
             throw new Exception\RuntimeException('haystack option is mandatory');
         }
         return $this->haystack;

test/InArrayTest.php

@@ -52,14 +52,14 @@ public function testGetHaystack()
         $this->assertEquals(array(1, 2, 3), $this->validator->getHaystack());
     }
 
-    public function testSetEmptyHaystack()
+    public function testUnsetHaystackRaisesException()
     {
-        $this->validator->setHaystack(array());
+        $validator = new InArray();
         $this->setExpectedException(
             'Zend\Validator\Exception\RuntimeException',
             'haystack option is mandatory'
         );
-        $this->validator->getHaystack();
+        $validator->getHaystack();
     }
 
     /**