✅ Add constant to PHPUnit bootstrap

Author: MatzeKitt

phpunit.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:noNamespaceSchemaLocation="vendor/phpunit/phpunit/phpunit.xsd"
-         bootstrap="vendor/autoload.php"
+         bootstrap="tests/unit/bootstrap.php"
          cacheDirectory=".phpunit.cache"
          executionOrder="depends,defects"
          requireCoverageMetadata="true"

tests/unit/bootstrap.php

@@ -0,0 +1,5 @@
+<?php
+
+require_once __DIR__ . '/../../vendor/autoload.php';
+
+\define('EPI_IMPRESSUM_FILE', __FILE__);