Issue #3062556 by alexpott, phenaproxima: UpdatePathTestBase does not support the $configSchemaCheckerExclusions property

core/tests/Drupal/FunctionalTests/Update/UpdatePathTestBase.php

@@ -367,9 +367,17 @@ abstract class UpdatePathTestBase extends BrowserTestBase {
       // executed. But once the update has been completed, it needs to be valid
       // again. Assert the schema of all configuration objects now.
       $names = $this->container->get('config.storage')->listAll();
+
+      // Allow tests to opt out of checking specific configuration.
+      $exclude = $this->getConfigSchemaExclusions();
       /** @var \Drupal\Core\Config\TypedConfigManagerInterface $typed_config */
       $typed_config = $this->container->get('config.typed');
       foreach ($names as $name) {
+        if (in_array($name, $exclude, TRUE)) {
+          // Skip checking schema if the config is listed in the
+          // $configSchemaCheckerExclusions property.
+          continue;
+        }
         $config = $this->config($name);
         $this->assertConfigSchema($typed_config, $name, $config->get());
       }

core/tests/Drupal/FunctionalTests/Update/UpdatePathTestBaseTest.php

@@ -182,4 +182,17 @@ class UpdatePathTestBaseTest extends UpdatePathTestBase {
     $this->assertFalse(\Drupal::service('cache.default')->get(__CLASS__));
   }
 
+  /**
+   * Tests that test running environment is updated when module list changes.
+   *
+   * @see update_test_schema_update_8003()
+   */
+  public function testSchemaChecking() {
+    // Create some configuration that should be skipped.
+    $this->config('config_schema_test.noschema')->set('foo', 'bar')->save();
+    $this->runUpdates();
+    $this->assertSame('bar', $this->config('config_schema_test.noschema')->get('foo'));
+
+  }
+
 }