function MainContentFallbackTest::testMainContentFallback

Tests availability of main content: Drupal falls back to SimplePageVariant.

File

core/modules/system/tests/src/Functional/System/MainContentFallbackTest.php, line 50

Class

MainContentFallbackTest

Test SimplePageVariant main content rendering fallback page display variant.

Namespace

Code

public function testMainContentFallback() : void {
  $edit = [];
  // Uninstall the block module.
  $edit['uninstall[block]'] = 'block';
  $this->drupalGet('admin/modules/uninstall');
  $this->submitForm($edit, 'Uninstall');
  $this->submitForm([], 'Uninstall');
  $this->assertSession()
    ->pageTextContains('The selected modules have been uninstalled.');
  $this->rebuildContainer();
  $this->assertFalse(\Drupal::moduleHandler()->moduleExists('block'), 'Block module uninstall.');
  // When Block module is not installed and BlockPageVariant is not available,
  // Drupal should fall back to SimplePageVariant. Both for the admin and the
  // front-end theme.
  $this->drupalGet('admin/config/system/site-information');
  $this->assertSession()
    ->fieldExists('site_name');
  $this->drupalGet('system-test/main-content-fallback');
  $this->assertSession()
    ->pageTextContains('Content to test main content fallback');
  // Request a user* page and see if it is displayed.
  $this->drupalLogin($this->webUser);
  $this->drupalGet('user/' . $this->webUser
    ->id() . '/edit');
  $this->assertSession()
    ->fieldExists('mail');
  // Enable the block module again.
  $this->drupalLogin($this->adminUser);
  $edit = [];
  $edit['modules[block][enable]'] = 'block';
  $this->drupalGet('admin/modules');
  $this->submitForm($edit, 'Install');
  $this->assertSession()
    ->pageTextContains('Module Block has been installed.');
  $this->rebuildContainer();
  $this->assertTrue(\Drupal::moduleHandler()->moduleExists('block'), 'Block module re-installed.');
}