+1 per-country VAT number, for bg_BG

readme.md

@@ -687,6 +687,15 @@ echo $faker->vat(false);    // "BE0123456789" - unspaced Belgian Value Added Tax
 
 ```
 
+### `Faker\Provider\bg_BG\Payment`
+```php
+<?php
+
+echo $faker->vat;           // "BG 0123456789" - Bulgarian Value Added Tax number
+echo $faker->vat(false);    // "BG0123456789" - unspaced Bulgarian Value Added Tax number
+
+```
+
 ### `Faker\Provider\cs_CZ\Address`
 ```php
 <?php

src/Faker/Provider/bg_BG/Payment.php

@@ -16,4 +16,28 @@ public static function bankAccountNumber($prefix = '', $countryCode = 'BG', $len
     {
         return static::iban($countryCode, $prefix, $length);
     }
+
+    /**
+     * Value Added Tax (VAT)
+     *
+     * @example 'BG1234567890', ('spaced') 'BG 1234567890'
+     *
+     * @see http://ec.europa.eu/taxation_customs/vies/faq.html?locale=en#item_11
+     * @see http://en.wikipedia.org/wiki/VAT_identification_number
+     *
+     * @param bool $spacedNationalPrefix
+     *
+     * @return string VAT Number
+     */
+    public static function vat($spacedNationalPrefix = true)
+    {
+        $prefix = ($spacedNationalPrefix) ? "BG " : "BG";
+
+        return sprintf(
+            "%s%d%d",
+            $prefix,
+            self::randomNumber(5, true), // workaround for mt_getrandmax() limitation
+            self::randomNumber(self::randomElement(array(4, 5)), true)
+        );
+    }
 }

test/Faker/Provider/bg_BG/PaymentTest.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace Faker\Test\Provider\bg_BG;
+
+use Faker\Generator;
+use Faker\Provider\bg_BG\Payment;
+
+class PaymentTest extends \PHPUnit_Framework_TestCase
+{
+
+    /**
+     * @var Generator
+     */
+    private $faker;
+
+    public function setUp()
+    {
+        $faker = new Generator();
+        $faker->addProvider(new Payment($faker));
+        $this->faker = $faker;
+    }
+
+    public function testVatIsValid()
+    {
+        $vat = $this->faker->vat();
+        $unspacedVat = $this->faker->vat(false);
+        $this->assertRegExp('/^(BG \d{9,10})$/', $vat);
+        $this->assertRegExp('/^(BG\d{9,10})$/', $unspacedVat);
+    }
+}