Constructive description here

vendor/fzaninotto/faker/test/Faker/Provider/PhoneNumberTest.php

@@ -0,0 +1,35 @@
+<?php
+
+namespace Faker\Test\Provider;
+
+use Faker\Generator;
+use Faker\Calculator\Luhn;
+use Faker\Provider\PhoneNumber;
+
+class PhoneNumberTest extends \PHPUnit_Framework_TestCase
+{
+
+    /**
+     * @var Generator
+     */
+    private $faker;
+
+    public function setUp()
+    {
+        $faker = new Generator();
+        $faker->addProvider(new PhoneNumber($faker));
+        $this->faker = $faker;
+    }
+
+    public function testPhoneNumberFormat()
+    {
+        $number = $this->faker->e164PhoneNumber();
+        $this->assertRegExp('/^\+[0-9]{11,}$/', $number);
+    }
+
+    public function testImeiReturnsValidNumber()
+    {
+        $imei = $this->faker->imei();
+        $this->assertTrue(Luhn::isValid($imei));
+    }
+}