Add lastName gender specific on ru_RU locale

src/Faker/Provider/ru_RU/Person.php

@@ -105,6 +105,8 @@ class Person extends \Faker\Provider\Person
         'Меркушев', 'Лыткин', 'Туров',
     );
 
+    protected static $lastNameSuffix = array('a', '');
+
     /**
      * Return male middle name
      *
@@ -154,4 +156,24 @@ public function middleName($gender = null)
             static::GENDER_FEMALE,
         )));
     }
+
+    /**
+     * Return last name for the specified gender.
+     *
+     * @param string|null $gender A gender of the last name should be generated
+     *     for. If the argument is skipped a random gender will be used.
+     * @return string Last name
+     */
+    public function lastName($gender = null)
+    {
+        $lastName = static::randomElement(static::$lastName);
+
+        if (static::GENDER_FEMALE === $gender) {
+            return $lastName . 'a';
+        } elseif (static::GENDER_MALE === $gender) {
+            return $lastName;
+        }
+
+        return $lastName . static::randomElement(static::$lastNameSuffix);
+    }
 }

test/Faker/Provider/ru_RU/PersonTest.php

@@ -0,0 +1,37 @@
+<?php
+
+namespace Faker\Test\Provider\ru_RU;
+
+use Faker\Generator;
+use Faker\Provider\ru_RU\Person;
+use PHPUnit\Framework\TestCase;
+
+class PersonTest extends TestCase
+{
+    /**
+     * @var Generator
+     */
+    private $faker;
+
+    public function setUp()
+    {
+        $faker = new Generator();
+        $faker->addProvider(new Person($faker));
+        $this->faker = $faker;
+    }
+
+    public function testLastNameFemale()
+    {
+        $this->assertEquals("a", substr($this->faker->lastName('female'), -1));
+    }
+
+    public function testLastNameMale()
+    {
+        $this->assertNotEquals("a", substr($this->faker->lastName('male'), -1));
+    }
+
+    public function testLastNameRandom()
+    {
+        $this->assertNotNull($this->faker->lastName());
+    }
+}