code style fix

add command tests

tests/Feature/SSHCommands/Database/UnlinkCommandTest.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace Tests\Feature\SSHCommands\Database;
+
+use App\SSHCommands\Database\UnlinkCommand;
+use Tests\TestCase;
+
+class UnlinkCommandTest extends TestCase
+{
+    public function test_generate_command()
+    {
+        $command = new UnlinkCommand('mysql', 'user', '%');
+
+        $expected = <<<'EOD'
+        if ! sudo mysql -e "REVOKE ALL PRIVILEGES, GRANT OPTION FROM 'user'@'%'"; then
+            echo 'VITO_SSH_ERROR' && exit 1
+        fi
+
+        echo "Command executed"
+        EOD;
+
+        $this->assertStringContainsString($expected, $command->content());
+    }
+}