--- /dev/null
+<?php
+
+namespace Drupal\system\Tests\Installer;
+
+use Drupal\Component\Utility\Crypt;
+use Drupal\simpletest\InstallerTestBase;
+
+/**
+ * Tests the installer when a config_directory set up but does not exist.
+ *
+ * @group Installer
+ */
+class InstallerConfigDirectorySetNoDirectoryErrorTest extends InstallerTestBase {
+
+ /**
+ * The directory where the sync directory should be created during install.
+ *
+ * @var string
+ */
+ protected $configDirectory;
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function setUp() {
+ $this->configDirectory = $this->publicFilesDirectory . '/config_' . Crypt::randomBytesBase64();
+ $this->settings['config_directories'][CONFIG_SYNC_DIRECTORY] = (object) [
+ 'value' => $this->configDirectory . '/sync',
+ 'required' => TRUE,
+ ];
+ // Create the files directory early so we can test the error case.
+ mkdir($this->publicFilesDirectory);
+ // Create a file so the directory can not be created.
+ file_put_contents($this->configDirectory, 'Test');
+ parent::setUp();
+ }
+
+ /**
+ * Installer step: Configure settings.
+ */
+ protected function setUpSettings() {
+ // This step should not appear as we had a failure prior to the settings
+ // screen.
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function setUpSite() {
+ // This step should not appear as we had a failure prior to the settings
+ // screen.
+ }
+
+ /**
+ * Verifies that installation failed.
+ */
+ public function testError() {
+ $this->assertText("An automated attempt to create the directory {$this->configDirectory}/sync failed, possibly due to a permissions problem.");
+ $this->assertFalse(file_exists($this->configDirectory . '/sync') && is_dir($this->configDirectory . '/sync'), "The directory {$this->configDirectory}/sync does not exist.");
+ }
+
+}