Issue #3257446 by phenaproxima: Remove deprecated PHPUnit assertions

tests/src/Build/UpdateTestBase.php

@@ -32,14 +32,17 @@ abstract class UpdateTestBase extends TemplateProjectSiteTestBase {
   protected function createTestProject(string $template): void {
     parent::createTestProject($template);
 
+    // BEGIN: DELETE FROM CORE MERGE REQUEST
     // Install Automatic Updates into the test project and ensure it wasn't
     // symlinked.
-    $dir = 'project';
-    $this->runComposer('composer config repo.automatic_updates path ' . __DIR__ . '/../../..', $dir);
-    $this->runComposer('composer require --no-update "drupal/automatic_updates:@dev"', $dir);
-    $output = $this->runComposer('COMPOSER_MIRROR_PATH_REPOS=1 composer update --with-all-dependencies', $dir);
-    $this->assertStringNotContainsString('Symlinking', $output);
-
+    if (__NAMESPACE__ === 'Drupal\Tests\automatic_updates\Build') {
+      $dir = 'project';
+      $this->runComposer('composer config repo.automatic_updates path ' . __DIR__ . '/../../..', $dir);
+      $this->runComposer('composer require --no-update "drupal/automatic_updates:@dev"', $dir);
+      $output = $this->runComposer('COMPOSER_MIRROR_PATH_REPOS=1 composer update --with-all-dependencies', $dir);
+      $this->assertStringNotContainsString('Symlinking', $output);
+    }
+    // END: DELETE FROM CORE MERGE REQUEST
     // Install Drupal. Always allow test modules to be installed in the UI and,
     // for easier debugging, always display errors in their dubious glory.
     $this->installQuickStart('minimal');

tests/src/Kernel/ReadinessValidation/StagedDatabaseUpdateValidatorTest.php

@@ -164,7 +164,7 @@ class StagedDatabaseUpdateValidatorTest extends AutomaticUpdatesKernelTestBase {
       // The file we're creating shouldn't already exist in the staging area
       // unless it's a file we actually ship, which is a scenario covered by
       // ::testFileChanged().
-      $this->assertFileNotExists($file);
+      $this->assertFileDoesNotExist($file);
       file_put_contents($file, $this->randomString());
     }