Issue #3245996: Move basic exclusions and test coverage into Package Manager

package_manager/tests/src/Functional/ExcludedPathsTest.php

@@ -5,6 +5,7 @@ namespace Drupal\Tests\package_manager\Functional;
 use Drupal\Core\Site\Settings;
 use Drupal\package_manager\PathLocator;
 use Drupal\package_manager\Stage;
+use Drupal\package_manager\StageException;
 use Drupal\Tests\BrowserTestBase;
 
 /**
@@ -57,7 +58,18 @@ class ExcludedPathsTest extends BrowserTestBase {
       $this->container->get('package_manager.cleaner'),
       $this->container->get('event_dispatcher')
     );
-    $stage->create();
+    try {
+      $stage->create();
+    }
+    catch (StageException $e) {
+      foreach ($e->getResults() as $result) {
+        print_r($result->getSummary() . "\n");
+        foreach ($result->getMessages() as $message) {
+          print_r($message . "\n");
+        }
+      }
+      throw $e;
+    }
 
     $this->assertDirectoryExists($stage_dir);
     $this->assertDirectoryNotExists("$stage_dir/sites/simpletest");