installQuickStart example

$theme_path_relative = 'themes/test_custom_theme';
    $info = $this->assertThemeExists($theme_path_relative);
    self::assertArrayNotHasKey('hidden', $info);
    self::assertArrayHasKey('generator', $info);
    self::assertEquals('starterkit_theme:9.4.0', $info['generator']);

    // Confirm readme is rewritten.     $readme_file = $this->getWorkspaceDirectory() . "/$theme_path_relative/README.md";
    $this->assertSame('test_custom_theme theme, generated from starterkit_theme. Additional information on generating themes can be found in the [Starterkit documentation](https://www.drupal.org/docs/core-modules-and-themes/core-themes/starterkit-theme).', file_get_contents($readme_file));

    // Ensure that the generated theme can be installed.     $this->installQuickStart('minimal');
    $this->formLogin($this->adminUsername, $this->adminPassword);
    $this->visit('/admin/appearance');
    $this->getMink()->assertSession()->pageTextContains('Test custom starterkit');
    $this->getMink()->assertSession()->pageTextContains('Custom theme generated from a starterkit theme');
    $this->getMink()->getSession()->getPage()->clickLink('Install "Test custom starterkit theme" theme');
    $this->getMink()->assertSession()->pageTextContains('The "Test custom starterkit theme" theme has been installed.');

    // Ensure that a new theme cannot be generated when the destination     // directory already exists.     $theme_path_absolute = $this->getWorkspaceDirectory() . "/$theme_path_relative";
    $this->assertFileExists($theme_path_absolute . '/test_custom_theme.theme');
    

  public function testHtRouter() {
    $sqlite = (new \PDO('sqlite::memory:'))->query('select sqlite_version()')->fetch()[0];
    if (version_compare($sqlite, Tasks::SQLITE_MINIMUM_VERSION) < 0) {
      $this->markTestSkipped();
    }

    $this->copyCodebase();
    $this->executeCommand('COMPOSER_DISCARD_CHANGES=true composer install --no-dev --no-interaction');
    $this->assertErrorOutputContains('Generating autoload files');
    $this->installQuickStart('minimal');
    $this->formLogin($this->adminUsername, $this->adminPassword);
    $this->visit('/.well-known/change-password');
    $this->assertDrupalVisit();
    $url = $this->getMink()->getSession()->getCurrentUrl();
    $this->assertEquals('http://localhost:' . $this->getPortNumber() . '/user/1/edit', $url);
  }

}