code style fix

add command tests

tests/Feature/SSHCommands/Database/DeleteCommandTest.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace Tests\Feature\SSHCommands\Database;
+
+use App\SSHCommands\Database\DeleteCommand;
+use Tests\TestCase;
+
+class DeleteCommandTest extends TestCase
+{
+    public function test_generate_command()
+    {
+        $command = new DeleteCommand('mysql', 'test');
+
+        $this->assertStringContainsString('sudo mysql -e "DROP DATABASE IF EXISTS test";', $command->content());
+    }
+}