Add test for PrintOptions

tests/Command/PrintOptionsTest.php

@@ -0,0 +1,20 @@
+<?php
+
+use Talal\LabelPrinter\Command;
+
+class PrintOptionsTest extends \PHPUnit_Framework_TestCase
+{
+    public function testEnabled()
+    {
+        $command = new Command\PrintOptions(true);
+
+        $this->assertEquals('5e515331', bin2hex($command->read()));
+    }
+
+    public function testDisabled()
+    {
+        $command = new Command\PrintOptions(false);
+
+        $this->assertEquals('5e515330', bin2hex($command->read()));
+    }
+}