fix empty config didnt lead to use default config correctly

CHANGELOG.md

@@ -12,6 +12,7 @@ using the [Keep a CHANGELOG](https://keepachangelog.com/) principles.
 ### Fixed
 
 - Fixed bug where the **DuplicateContentRule** validation didn't work for single-hierarchy storages like INI, ...
+- If an empty config value was provided, it did not correctly use the default phpunuhi.xml file.
 
 ### Removed
 

src/Traits/CommandTrait.php

@@ -32,6 +32,8 @@ protected function getConfigFile(InputInterface $input): string
             $configFile = '';
         }
 
+        $configFile = trim($configFile);
+
         if ($configFile === '' || $configFile === '0') {
             $configFile = 'phpunuhi.xml';
         }

tests/phpunit/Traits/CommandTraitTest.php

@@ -5,6 +5,7 @@
 use PHPUnit\Framework\TestCase;
 use PHPUnuhi\PHPUnuhi;
 use PHPUnuhi\Traits\CommandTrait;
+use Symfony\Component\Console\Input\InputInterface;
 
 class CommandTraitTest extends TestCase
 {
@@ -20,4 +21,40 @@ public function testShowHeader(): void
 
         $this->showHeader();
     }
+
+    /**
+     * @return void
+     */
+    public function testGetConfigFileWithCustomValue(): void
+    {
+        $input = $this->createMock(InputInterface::class);
+        $input->method('getOption')->willReturn('test.xml');
+
+        $config = $this->getConfigFile($input);
+
+        $expected = getcwd() . '/test.xml';
+
+        $this->assertEquals($expected, $config);
+    }
+
+    /**
+     * @testWith [ null ]
+     *            [ "" ]
+     *            [ " " ]
+     *
+     * @param $option
+     * @return void
+     */
+    public function testGetConfigFileWithoutValueGivesDefaultConfig($option): void
+    {
+        $input = $this->createMock(InputInterface::class);
+        $input->method('getOption')->willReturn($option);
+
+        $config = $this->getConfigFile($input);
+
+        $expected = getcwd() . '/phpunuhi.xml';
+
+        $this->assertEquals($expected, $config);
+    }
+
 }