public function ThemeTest::testUninstallingThemes in Drupal 9

Same name and namespace in other branches

1. 8 core/modules/system/tests/src/Functional/System/ThemeTest.php \Drupal\Tests\system\Functional\System\ThemeTest::testUninstallingThemes()

Tests uninstalling of themes works.

File

core/modules/system/tests/src/Functional/System/ThemeTest.php, line 402

Class

ThemeTest

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

Namespace

Drupal\Tests\system\Functional\System

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
    ->drupalGet('admin/appearance');
  $this
    ->submitForm($edit, 'Save configuration');
  $this
    ->drupalGet('admin/appearance');
  $this
    ->clickLink('Set as default');

  // Check that seven cannot be uninstalled as it is the admin theme.
  $this
    ->assertSession()
    ->responseNotContains('Uninstall Seven theme');

  // Check that bartik cannot be uninstalled as it is the default theme.
  $this
    ->assertSession()
    ->responseNotContains('Uninstall Bartik theme');

  // Check that the classy theme cannot be uninstalled as it is a base theme
  // of seven and bartik.
  $this
    ->assertSession()
    ->responseNotContains('Uninstall Classy theme');

  // Install Stark and set it as the default theme.
  \Drupal::service('theme_installer')
    ->install([
    'stark',
  ]);
  $edit = [
    'admin_theme' => 'stark',
    'use_admin_theme' => TRUE,
  ];
  $this
    ->drupalGet('admin/appearance');
  $this
    ->submitForm($edit, 'Save configuration');

  // Check that seven can be uninstalled now.
  $this
    ->assertSession()
    ->responseContains('Uninstall Seven theme');

  // Check that the classy theme still cannot be uninstalled as it is a
  // base theme of bartik.
  $this
    ->assertSession()
    ->responseNotContains('Uninstall Classy theme');

  // Change the default theme to stark, stark is second in the list.
  $this
    ->clickLink('Set as default', 1);

  // Check that bartik can be uninstalled now.
  $this
    ->assertSession()
    ->responseContains('Uninstall Bartik theme');

  // Check that the classy theme still can't be uninstalled as neither of its
  // base themes have been.
  $this
    ->assertSession()
    ->responseNotContains('Uninstall Classy theme');

  // Uninstall each of the three themes starting with Bartik.
  $this
    ->clickLink('Uninstall');
  $this
    ->assertSession()
    ->responseContains('The <em class="placeholder">Bartik</em> theme has been uninstalled');

  // Seven is the second in the list.
  $this
    ->clickLink('Uninstall');
  $this
    ->assertSession()
    ->responseContains('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
    ->assertSession()
    ->responseNotContains('Uninstall Classy theme');
}