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.');
}