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() {
    $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 enabled.');
    $this->rebuildContainer();
    $this->assertTrue(\Drupal::moduleHandler()->moduleExists('block'), 'Block module re-enabled.');
}