generateThemeFromStarterkit example

/** * Tests the generate-theme command. */
  public function test() {
    // Do not rely on \Drupal::VERSION: change the version to a concrete version     // number, to simulate using a tagged core release.     $starterkit_info_yml = $this->getWorkspaceDirectory() . '/core/themes/starterkit_theme/starterkit_theme.info.yml';
    $info = Yaml::decode(file_get_contents($starterkit_info_yml));
    $info['version'] = '9.4.0';
    file_put_contents($starterkit_info_yml, Yaml::encode($info));

    $process = $this->generateThemeFromStarterkit();
    $result = $process->run();
    $this->assertEquals('Theme generated successfully to themes/test_custom_theme', trim($process->getOutput()), $process->getErrorOutput());
    $this->assertSame(0, $result);

    $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.