Issue #3230507: Create build tests for case where site is using core recommended Composer project

tests/src/Build/AttendedCoreRecommendedUpdateTest.php

@@ -17,20 +17,17 @@ class AttendedCoreRecommendedUpdateTest extends AttendedCoreUpdateTest {
   /**
    * {@inheritdoc}
    */
-  protected function prepareForUpdate(string $version): void {
-    parent::prepareForUpdate($version);
+  protected function getConfigurationForUpdate(string $version): array {
+    $changes = parent::getConfigurationForUpdate($version);
 
-    $this->alterPackage($this->getWorkspaceDirectory(), [
-      'repositories' => [
-        'drupal/core-recommended' => [
-          'type' => 'path',
-          'url' => $this->createTargetMetapackage($version),
-          'options' => [
-            'symlink' => FALSE,
-          ],
-        ],
+    $changes['repositories']['drupal/core-recommended'] = [
+      'type' => 'path',
+      'url' => $this->createTargetMetapackage($version),
+      'options' => [
+        'symlink' => FALSE,
       ],
-    ]);
+    ];
+    return $changes;
   }
 
   /**
@@ -64,8 +61,8 @@ class AttendedCoreRecommendedUpdateTest extends AttendedCoreUpdateTest {
   /**
    * {@inheritdoc}
    */
-  protected function getComposerConfiguration(): array {
-    $configuration = parent::getComposerConfiguration();
+  protected function getInitialConfiguration(): array {
+    $configuration = parent::getInitialConfiguration();
 
     $require = &$configuration['require'];
     $require['drupal/core-recommended'] = $require['drupal/core'];