add new assertion

src/Expectation.php

@@ -157,6 +157,7 @@ final class Expectation
         $value          = is_array($this->value) ? $this->value : iterator_to_array($this->value);
         $keys           = array_keys($value);
         $values         = array_values($value);
+        $callbacksCount = count($callbacks);
 
         $index = 0;
 
@@ -165,6 +166,10 @@ final class Expectation
             $index       = $index < count($values) - 1 ? $index + 1 : 0;
         }
 
+        if ($callbacksCount > count($values)) {
+            Assert::assertLessThanOrEqual(count($value), count($callbacks));
+        }
+
         foreach ($values as $key => $item) {
             if (is_callable($callbacks[$key])) {
                 call_user_func($callbacks[$key], new self($item), new self($keys[$key]));