Deprecate other values than string for CreditCard

src/IsoCodes/CreditCard.php

@@ -16,6 +16,15 @@ class CreditCard implements IsoCodeInterface
      */
     public static function validate($creditCard)
     {
+        if (!is_string($creditCard) && !empty($creditCard)) {
+            @trigger_error(
+                'Passing other values than a string on '.__METHOD__.' is deprecated since version 2.2.'
+                .' It will be considered as invalid on version 3.0.',
+                E_USER_DEPRECATED
+            );
+        }
+
+        // Add !is_string($creditCard) to the condition on 3.0.
         if (trim($creditCard) === '') {
             return false;
         }

tests/IsoCodes/Tests/AbstractIsoCodeInterfaceTest.php

@@ -9,6 +9,7 @@ abstract class AbstractIsoCodeInterfaceTest extends AbstractIsoCodeTest
 {
     /**
      * @dataProvider getValidValues
+     * @dataProvider getLegacyValidValues
      */
     final public function testValidValues($value)
     {
@@ -18,6 +19,7 @@ final public function testValidValues($value)
 
     /**
      * @dataProvider getInvalidValues
+     * @dataProvider getLegacyInvalidValidValues
      */
     final public function testInvalidValues($value)
     {

tests/IsoCodes/Tests/AbstractIsoCodeTest.php

@@ -12,11 +12,31 @@ abstract class AbstractIsoCodeTest extends \PHPUnit_Framework_TestCase
      */
     abstract public function getValidValues();
 
+    /**
+     * Optional. For legacy tests.
+     *
+     * @return array[]
+     */
+    public function getLegacyValidValues()
+    {
+        return [];
+    }
+
     /**
      * @return array[]
      */
     abstract public function getInvalidValues();
 
+    /**
+     * Optional. For legacy tests.
+     *
+     * @return array[]
+     */
+    public function getLegacyInvalidValues()
+    {
+        return [];
+    }
+
     final public function testEmptyValues()
     {
         $class = $this->getIsoCodesClass();

tests/IsoCodes/Tests/CreditCardTest.php

@@ -26,7 +26,6 @@ public function getValidValues()
             ['4903010000000009'],       //Switch
             ['4111111111111111'],       //Visa
             ['6304100000000008'],       //Laser
-            [6304100000000008],         //Laser
             ['4917300800000000'],       // VisaElectron
             ['6759649826438453'],       // Maestro (long)
             ['6799990100000000019'],    // maestro (short)
@@ -36,6 +35,21 @@ public function getValidValues()
         ];
     }
 
+    /**
+     * {@inheritdoc}
+     */
+    public function getLegacyValidValues()
+    {
+        $values = [];
+
+        // To be removed on 4.0.
+        if (8 === PHP_INT_SIZE) { // This test will success only on 64bits systems.
+            $values[] = [6304100000000008]; // Laser
+        }
+
+        return $values;
+    }
+
     /**
      * {@inheritdoc}
      */