Add INN and KPP support for ru_RU locale

readme.md

@@ -1415,6 +1415,12 @@ echo $faker->premiumRatePhoneNumber; // "0900123456"
 
 // Generates a Russian bank name (based on list of real russian banks)
 echo $faker->bank; // "ОТП Банк"
+
+//Generate a Russian Tax Payment Number for Company
+echo $faker->inn; //  7813540735
+
+//Generate a Russian Tax Code for Company
+echo $faker->kpp; // 781301001
 ```
 
 ### `Faker\Provider\sv_SE\Payment`

src/Faker/Calculator/Inn.php

@@ -0,0 +1,34 @@
+<?php
+namespace Faker\Calculator;
+
+class Inn
+{
+    /**
+     * Generates INN Checksum
+     *
+     * https://ru.wikipedia.org/wiki/%D0%98%D0%B4%D0%B5%D0%BD%D1%82%D0%B8%D1%84%D0%B8%D0%BA%D0%B0%D1%86%D0%B8%D0%BE%D0%BD%D0%BD%D1%8B%D0%B9_%D0%BD%D0%BE%D0%BC%D0%B5%D1%80_%D0%BD%D0%B0%D0%BB%D0%BE%D0%B3%D0%BE%D0%BF%D0%BB%D0%B0%D1%82%D0%B5%D0%BB%D1%8C%D1%89%D0%B8%D0%BA%D0%B0
+     *
+     * @param string $inn
+     * @return string Checksum (one digit)
+     */
+    public static function checksum($inn)
+    {
+        $multipliers = array(1 => 2, 2 => 4, 3 => 10, 4 => 3, 5 => 5, 6 => 9, 7 => 4, 8 => 6, 9 => 8);
+        $sum = 0;
+        for ($i = 1; $i <= 9; $i++) {
+            $sum += intval(substr($inn, $i-1, 1)) * $multipliers[$i];
+        }
+        return strval(($sum % 11) % 10);
+    }
+
+    /**
+     * Checks whether an INN has a valid checksum
+     *
+     * @param string $inn
+     * @return boolean
+     */
+    public static function isValid($inn)
+    {
+        return self::checksum(substr($inn, 0, -1)) === substr($inn, -1, 1);
+    }
+}

src/Faker/Provider/ru_RU/Company.php

@@ -49,4 +49,25 @@ public static function companyNameSuffix()
     {
         return static::randomElement(static::$companyNameSuffixes);
     }
+
+    public static function inn($area_code = "")
+    {
+        if ($area_code === "" || intval($area_code) == 0) {
+            //Simple generation code for areas in Russian without check for valid
+            $area_code = static::numberBetween(1, 91);
+        } else {
+            $area_code = intval($area_code);
+        }
+        $area_code = str_pad($area_code, 2, '0', STR_PAD_LEFT);
+        $inn_base =  $area_code . static::numerify('#######');
+        return $inn_base . \Faker\Calculator\Inn::checksum($inn_base);
+    }
+
+    public static function kpp($inn = "")
+    {
+        if ($inn == "" || strlen($inn) < 4) {
+            $inn = static::inn();
+        }
+        return substr($inn, 0, 4) . "01001";
+    }
 }

test/Faker/Calculator/InnTest.php

@@ -0,0 +1,50 @@
+<?php
+
+namespace Faker\Test\Calculator;
+
+use Faker\Calculator\Inn;
+
+class InnTest extends \PHPUnit_Framework_TestCase
+{
+
+    public function checksumProvider()
+    {
+        return array(
+            array('143525744', '4'),
+            array('500109285', '3'),
+            array('500109285', '3'),
+            array('500109285', '3'),
+            array('027615723', '1')
+        );
+    }
+
+    /**
+     * @dataProvider checksumProvider
+     */
+    public function testChecksum($inn, $checksum)
+    {
+        $this->assertEquals($checksum, Inn::checksum($inn), $inn);
+    }
+
+    public function validatorProvider()
+    {
+        return array(
+            array('5902179757', true),
+            array('5408294405', true),
+            array('2724164617', true),
+            array('0726000515', true),
+            array('6312123552', true),
+
+            array('1111111111', false),
+            array('0123456789', false),
+        );
+    }
+
+    /**
+     * @dataProvider validatorProvider
+     */
+    public function testIsValid($inn, $isValid)
+    {
+        $this->assertEquals($isValid, Inn::isValid($inn), $inn);
+    }
+}

test/Faker/Provider/ru_RU/CompanyTest.php

@@ -0,0 +1,36 @@
+<?php
+
+namespace Faker\Test\Provider\ru_RU;
+
+use Faker\Generator;
+use Faker\Provider\ru_RU\Company;
+
+class CompanyTest extends \PHPUnit_Framework_TestCase
+{
+    /**
+     * @var Generator
+     */
+    private $faker;
+
+    public function setUp()
+    {
+        $faker = new Generator();
+        $faker->addProvider(new Company($faker));
+        $this->faker = $faker;
+    }
+
+    public function testINN()
+    {
+        $this->assertRegExp('/^[0-9]{10}$/', $this->faker->inn);
+        $this->assertEquals("77", substr($this->faker->inn("77"), 0, 2));
+        $this->assertEquals("02", substr($this->faker->inn(2), 0, 2));
+    }
+
+    public function testKPP()
+    {
+        $this->assertRegExp('/^[0-9]{9}$/', $this->faker->kpp);
+        $this->assertEquals("01001", substr($this->faker->kpp, -5, 5));
+        $inn = $this->faker->inn;
+        $this->assertEquals(substr($inn, 0, 4), substr($this->faker->kpp($inn), 0, 4));
+    }
+}