code style fix

add command tests

tests/Feature/SSHCommands/Storage/UploadToDropboxCommandTest.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace Tests\Feature\SSHCommands\Storage;
+
+use App\SSHCommands\Storage\UploadToDropboxCommand;
+use Tests\TestCase;
+
+class UploadToDropboxCommandTest extends TestCase
+{
+    public function test_generate_command()
+    {
+        $command = new UploadToDropboxCommand('src', 'dest', 'token');
+
+        $expected = <<<EOD
+        curl -sb --location --request POST 'https://content.dropboxapi.com/2/files/upload' \
+        --header 'Accept: application/json' \
+        --header 'Dropbox-API-Arg: {"path":"dest"}' \
+        --header 'Content-Type: text/plain; charset=dropbox-cors-hack' \
+        --header 'Authorization: Bearer token' \
+        --data-binary '@src'
+        EOD;
+
+        $this->assertStringContainsString($expected, $command->content());
+    }
+}