function ThemeEarlyInitializationTest::testRequestListener

Tests that the theme system can generate output in a request listener.

File

core/modules/system/tests/src/Functional/Theme/ThemeEarlyInitializationTest.php, line 29

Class

ThemeEarlyInitializationTest

Tests theme system initialization early in the page request.

Namespace

Code

public function testRequestListener() {
    $this->drupalGet('theme-test/request-listener');
    // Verify that themed output generated in the request listener appears.
    $this->assertSession()
        ->responseContains('Themed output generated in a KernelEvents::REQUEST listener');
    // Verify that the default theme's CSS still appears even though the theme
    // system was initialized early.
    $this->assertSession()
        ->responseContains('starterkit_theme/css/components/action-links.css');
}