Issue #3276662 by kunal.sachdev: Add test coverage for the fix in #3276661

tests/src/Kernel/ReadinessValidation/CronUpdateVersionValidatorTest.php

+<?php
+
+namespace Drupal\Tests\automatic_updates\Kernel\ReadinessValidation;
+
+use Drupal\automatic_updates\CronUpdater;
+use Drupal\package_manager\ValidationResult;
+use Drupal\Tests\automatic_updates\Kernel\AutomaticUpdatesKernelTestBase;
+use Drupal\Tests\package_manager\Traits\PackageManagerBypassTestTrait;
+
+/**
+ * @covers \Drupal\automatic_updates\Validator\CronUpdateVersionValidator
+ *
+ * @group automatic_updates
+ */
+class CronUpdateVersionValidatorTest extends AutomaticUpdatesKernelTestBase {
+
+  use PackageManagerBypassTestTrait;
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $modules = ['automatic_updates'];
+
+  /**
+   * Data provider for ::testValidationSkippedIfCronUpdatesDisabled().
+   *
+   * @return array[]
+   *   Sets of arguments to pass to the test method.
+   */
+  public function providerValidationSkippedIfCronUpdatesDisabled(): array {
+    $unstable_current_version = [
+      ValidationResult::createError([
+        'Drupal cannot be automatically updated during cron from its current version, 9.7.0-alpha1, because Automatic Updates only supports updating from stable versions during cron.',
+      ]),
+    ];
+    return [
+      'disabled' => [
+        CronUpdater::DISABLED,
+        [],
+      ],
+      'security only' => [
+        CronUpdater::SECURITY,
+        $unstable_current_version,
+      ],
+      'all' => [
+        CronUpdater::ALL,
+        $unstable_current_version,
+      ],
+    ];
+  }
+
+  /**
+   * Tests that validation is skipped if cron updates are disabled.
+   *
+   * @param string $cron_setting
+   *   The value of the automatic_updates.settings:cron config setting.
+   * @param \Drupal\package_manager\ValidationResult[] $expected_results
+   *   The expected validation results.
+   *
+   * @dataProvider providerValidationSkippedIfCronUpdatesDisabled
+   */
+  public function testValidationSkippedIfCronUpdatesDisabled(string $cron_setting, array $expected_results): void {
+    // Set the currently installed version of core to a version that cannot be
+    // automatically updated, and will always trigger a validation error. This
+    // way, we can be certain that validation only happens if cron updates are
+    // enabled.
+    $this->setCoreVersion('9.7.0-alpha1');
+    $this->config('automatic_updates.settings')
+      ->set('cron', $cron_setting)
+      ->save();
+
+    $this->assertCheckerResultsFromManager($expected_results, TRUE);
+    $this->container->get('cron')->run();
+    $this->assertUpdateStagedTimes(0);
+  }
+
+}