code style fix

add command tests

tests/Feature/SSHCommands/Service/StopServiceCommandTest.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace Tests\Feature\SSHCommands\Service;
+
+use App\SSHCommands\Service\StopServiceCommand;
+use Tests\TestCase;
+
+class StopServiceCommandTest extends TestCase
+{
+    public function test_generate_command()
+    {
+        $command = new StopServiceCommand('nginx');
+
+        $expected = <<<'EOD'
+        sudo service nginx stop
+
+        sudo service nginx status | cat
+        EOD;
+
+        $this->assertStringContainsString($expected, $command->content());
+    }
+}