function ThemeTest::testUninstallingThemes

Test uninstalling of themes works.

File

core/modules/system/tests/src/Functional/System/ThemeTest.php, line 396

Class

ThemeTest

Tests the theme interface functionality by enabling and switching themes, and using an administration theme.

Namespace

Code

public function testUninstallingThemes() {
  // Install Bartik and set it as the default theme.
  \Drupal::service('theme_installer')->install([
    'bartik',
  ]);
  // Set up seven as the admin theme.
  \Drupal::service('theme_installer')->install([
    'seven',
  ]);
  $edit = [
    'admin_theme' => 'seven',
    'use_admin_theme' => TRUE,
  ];
  $this->drupalPostForm('admin/appearance', $edit, t('Save configuration'));
  $this->drupalGet('admin/appearance');
  $this->clickLink(t('Set as default'));
  // Check that seven cannot be uninstalled as it is the admin theme.
  $this->assertNoRaw('Uninstall Seven theme', 'A link to uninstall the Seven theme does not appear on the theme settings page.');
  // Check that bartik cannot be uninstalled as it is the default theme.
  $this->assertNoRaw('Uninstall Bartik theme', 'A link to uninstall the Bartik theme does not appear on the theme settings page.');
  // Check that the classy theme cannot be uninstalled as it is a base theme
  // of seven and bartik.
  $this->assertNoRaw('Uninstall Classy theme', 'A link to uninstall the Classy theme does not appear on the theme settings page.');
  // Install Stark and set it as the default theme.
  \Drupal::service('theme_installer')->install([
    'stark',
  ]);
  $edit = [
    'admin_theme' => 'stark',
    'use_admin_theme' => TRUE,
  ];
  $this->drupalPostForm('admin/appearance', $edit, t('Save configuration'));
  // Check that seven can be uninstalled now.
  $this->assertRaw('Uninstall Seven theme', 'A link to uninstall the Seven theme does appear on the theme settings page.');
  // Check that the classy theme still cannot be uninstalled as it is a
  // base theme of bartik.
  $this->assertNoRaw('Uninstall Classy theme', 'A link to uninstall the Classy theme does not appear on the theme settings page.');
  // Change the default theme to stark, stark is second in the list.
  $this->clickLink(t('Set as default'), 1);
  // Check that bartik can be uninstalled now.
  $this->assertRaw('Uninstall Bartik theme', 'A link to uninstall the Bartik theme does appear on the theme settings page.');
  // Check that the classy theme still can't be uninstalled as neither of its
  // base themes have been.
  $this->assertNoRaw('Uninstall Classy theme', 'A link to uninstall the Classy theme does not appear on the theme settings page.');
  // Uninstall each of the three themes starting with Bartik.
  $this->clickLink(t('Uninstall'));
  $this->assertRaw('The <em class="placeholder">Bartik</em> theme has been uninstalled');
  // Seven is the second in the list.
  $this->clickLink(t('Uninstall'));
  $this->assertRaw('The <em class="placeholder">Seven</em> theme has been uninstalled');
  // Check that the classy theme still can't be uninstalled as it is hidden.
  $this->assertNoRaw('Uninstall Classy theme', 'A link to uninstall the Classy theme does not appear on the theme settings page.');
}