Issue #3252126: Detect DB updates and do not apply a update via cron if there is a DB update

tests/src/Kernel/ReadinessValidation/StagedUpdateFunctionsValidatorTest.php

@@ -58,8 +58,13 @@ class StagedUpdateFunctionsValidatorTest extends AutomaticUpdatesKernelTestBase
    * Tests that no errors are raised if staged files are unchanged.
    */
   public function testNoChanges(): void {
-    $this->container->get('automatic_updates.updater')->apply();
-    $this->assertTrue(TRUE);
+    try {
+      $this->container->get('automatic_updates.updater')->apply();
+    }
+    catch (StageValidationException $e) {
+      print_r($e->getResults());
+      $this->fail('sadness');
+    }
   }
 
   /**