function ThemeUpdateTest::testThemeUpdates
Ensures preprocess functions run even for suggestion implementations.
The theme hook used by this test has its base preprocess function in a separate file, so this test also ensures that the file is correctly loaded when needed.
File
- 
              core/
modules/ system/ tests/ src/ Functional/ Theme/ ThemeUpdateTest.php, line 30  
Class
- ThemeUpdateTest
 - Tests low-level theme functions.
 
Namespace
Drupal\Tests\system\Functional\ThemeCode
public function testThemeUpdates() : void {
  \Drupal::service('module_installer')->install([
    'test_module_required_by_theme',
  ]);
  $this->rebuildAll();
  \Drupal::state()->set('test_theme_depending_on_modules.system_info_alter', [
    'dependencies' => [
      'test_module_required_by_theme',
      'stark',
    ],
  ]);
  \Drupal::service('theme_installer')->install([
    'test_theme_depending_on_modules',
  ]);
  $this->assertTrue(\Drupal::service('theme_handler')->themeExists('test_theme_depending_on_modules'), 'test_theme_depending_on_modules theme installed');
  \Drupal::state()->set('test_theme_depending_on_modules.system_info_alter', FALSE);
  \Drupal::state()->set('test_theme_depending_on_modules.post_update', TRUE);
  $this->assertFalse(\Drupal::moduleHandler()->moduleExists('test_another_module_required_by_theme'));
  $this->runUpdates();
  $this->assertTrue(\Drupal::moduleHandler()->moduleExists('test_another_module_required_by_theme'));
  $this->assertSession()
    ->addressEquals('update.php/results');
  $this->assertSession()
    ->responseContains('test_theme_depending_on_modules theme');
  $this->assertSession()
    ->responseContains('Post update message from theme post update function');
}
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