Add some tests, and service refactor

Tests/Command/SmsSendCommandTest.php

@@ -0,0 +1,46 @@
+<?php
+namespace Jhg\NexmoBundle\Tests\Command;
+
+use Jhg\NexmoBundle\Command\SmsSendCommand;
+use Symfony\Component\Console\Application;
+use Symfony\Component\Console\Tester\CommandTester;
+use Symfony\Component\Serializer\Exception\RuntimeException;
+
+/**
+* Class SmsSendCommandTest
+ * @package Jhg\NexmoBundle\Tests\Command
+ *
+ * @author Javi Hernández
+ */
+class SmsSendCommandTest extends \PHPUnit_Framework_TestCase {
+
+    public function testExecute()
+    {
+        $application = new Application();
+        $application->add(new SmsSendCommand());
+
+        $command = $application->find('nexmo:sms:send');
+        $commandTester = new CommandTester($command);
+
+        try {
+            $commandTester->execute(array());
+            $this->assertTrue(false);
+        } catch(\RuntimeException $e) {
+            $this->assertEquals('Not enough arguments.',$e->getMessage());
+        }
+
+        $arguments = array(
+            'command'   => 'nexmo:sms:send',
+            'number'    => 'demo:greet',
+            'fromName'  => 'Fabien',
+            'message'   => '',
+        );
+
+        $input = new ArrayInput($arguments);
+        $returnCode = $command->run($input, $output);
+
+        $commandTester->execute(array("+34666555444","MyApp","Hello World!!"));
+
+//        $this->assertRegExp('/.../', $commandTester->getDisplay());
+    }
+}