GenerateThemeTest.php

<?php

declare (strict_types=1);
namespace Drupal\BuildTests\Command;

use Drupal\BuildTests\QuickStart\QuickStartTestBase;
use Drupal\Core\Command\GenerateTheme;
use Drupal\Core\Serialization\Yaml;
use Drupal\sqlite\Driver\Database\sqlite\Install\Tasks;
use Symfony\Component\Console\Tester\CommandTester;
use Symfony\Component\Console\Tester\Constraint\CommandIsSuccessful;
use Symfony\Component\Process\PhpExecutableFinder;
use Symfony\Component\Process\Process;

/**
 * Tests the generate-theme commands.
 *
 * @requires extension pdo_sqlite
 *
 * @group Command
 * @group #slow
 */
class GenerateThemeTest extends QuickStartTestBase {
    
    /**
     * The PHP executable path.
     *
     * @var string
     */
    protected $php;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        $sqlite = (new \PDO('sqlite::memory:'))->query('select sqlite_version()')
            ->fetch()[0];
        if (version_compare($sqlite, Tasks::SQLITE_MINIMUM_VERSION) < 0) {
            $this->markTestSkipped();
        }
        parent::setUp();
        $php_executable_finder = new PhpExecutableFinder();
        $this->php = $php_executable_finder->find();
        $this->copyCodebase();
        $this->executeCommand('COMPOSER_DISCARD_CHANGES=true composer install --no-dev --no-interaction');
        chdir($this->getWorkingPath());
    }
    
    /**
     * Generates PHP process to generate a theme from core's starterkit theme.
     *
     * @return \Symfony\Component\Process\Process
     *   The PHP process
     */
    private function generateThemeFromStarterkit($env = NULL) : Process {
        $install_command = [
            $this->php,
            'core/scripts/drupal',
            'generate-theme',
            'test_custom_theme',
            '--name="Test custom starterkit theme"',
            '--description="Custom theme generated from a starterkit theme"',
        ];
        $process = new Process($install_command, NULL, $env);
        $process->setTimeout(60);
        return $process;
    }
    
    /**
     * Asserts the theme exists. Returns the parsed *.info.yml file.
     *
     * @param string $theme_path_relative
     *   The core-relative path to the theme.
     *
     * @return array
     *   The parsed *.info.yml file.
     */
    private function assertThemeExists(string $theme_path_relative) : array {
        $theme_path_absolute = $this->getWorkspaceDirectory() . "/{$theme_path_relative}";
        $theme_name = basename($theme_path_relative);
        $info_yml_filename = "{$theme_name}.info.yml";
        $this->assertFileExists($theme_path_absolute . '/' . $info_yml_filename);
        $info = Yaml::decode(file_get_contents($theme_path_absolute . '/' . $info_yml_filename));
        return $info;
    }
    
    /**
     * Tests the generate-theme command.
     */
    public function test() : void {
        // 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();
        $this->assertStringContainsString('Theme generated successfully to themes/test_custom_theme', trim($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.
        $readme_file = $this->getWorkspaceDirectory() . "/{$theme_path_relative}/README.md";
        $this->assertSame('"Test custom starterkit theme" theme, generated from starterkit_theme. Additional information on generating themes can be found in the [Starterkit documentation](https://www.drupal.org/docs/core-modules-and-themes/core-themes/starterkit-theme).', file_get_contents($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');
        unlink($theme_path_absolute . '/test_custom_theme.theme');
        $process = $this->generateThemeFromStarterkit();
        $result = $process->run();
        $this->assertStringContainsString('Theme could not be generated because the destination directory', $process->getErrorOutput());
        $this->assertStringContainsString($theme_path_relative, $process->getErrorOutput());
        $this->assertSame(1, $result);
        $this->assertFileDoesNotExist($theme_path_absolute . '/test_custom_theme.theme');
    }
    
    /**
     * Tests generating a theme from another Starterkit enabled theme.
     */
    public function testGeneratingFromAnotherTheme() : void {
        // 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();
        $exit_code = $process->run();
        $this->assertStringContainsString('Theme generated successfully to themes/test_custom_theme', trim($process->getOutput()), $process->getErrorOutput());
        $this->assertSame(0, $exit_code);
        file_put_contents($this->getWorkspaceDirectory() . '/themes/test_custom_theme/test_custom_theme.starterkit.yml', <<<YAML
delete: []
no_edit: []
no_rename: []
info:
  version: 1.0.0
YAML
);
        $install_command = [
            $this->php,
            'core/scripts/drupal',
            'generate-theme',
            'generated_from_another_theme',
            '--name="Generated from another theme"',
            '--description="Custom theme generated from a theme other than starterkit_theme"',
            '--starterkit=test_custom_theme',
        ];
        $process = new Process($install_command);
        $exit_code = $process->run();
        $this->assertStringContainsString('Theme generated successfully to themes/generated_from_another_theme', trim($process->getOutput()), $process->getErrorOutput());
        $this->assertSame(0, $exit_code);
        // Confirm new .theme file.
        $dot_theme_file = $this->getWorkspaceDirectory() . '/themes/generated_from_another_theme/generated_from_another_theme.theme';
        $this->assertStringContainsString('function generated_from_another_theme_preprocess_image_widget(array &$variables) {', file_get_contents($dot_theme_file));
    }
    
    /**
     * Tests the generate-theme command on a dev snapshot of Drupal core.
     */
    public function testDevSnapshot() : void {
        // Do not rely on \Drupal::VERSION: change the version to a development
        // snapshot version number, to simulate using a branch snapshot of core.
        $starterkit_info_yml = $this->getWorkspaceDirectory() . '/core/themes/starterkit_theme/starterkit_theme.info.yml';
        $info = Yaml::decode(file_get_contents($starterkit_info_yml));
        $info['version'] = '9.4.0-dev';
        file_put_contents($starterkit_info_yml, Yaml::encode($info));
        $process = $this->generateThemeFromStarterkit();
        $result = $process->run();
        $this->assertStringContainsString('Theme generated successfully to themes/test_custom_theme', trim($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', $info);
        self::assertMatchesRegularExpression('/^starterkit_theme\\:9.4.0-dev#[0-9a-f]+$/', $info['generator']);
    }
    
    /**
     * Tests the generate-theme command on a theme with a release version number.
     */
    public function testContribStarterkit() : void {
        // Change the version to a concrete version number, to simulate using a
        // contrib theme as the starterkit.
        $starterkit_info_yml = $this->getWorkspaceDirectory() . '/core/themes/starterkit_theme/starterkit_theme.info.yml';
        $info = Yaml::decode(file_get_contents($starterkit_info_yml));
        $info['version'] = '1.20';
        file_put_contents($starterkit_info_yml, Yaml::encode($info));
        $process = $this->generateThemeFromStarterkit();
        $result = $process->run();
        $this->assertStringContainsString('Theme generated successfully to themes/test_custom_theme', trim($process->getOutput()), $process->getErrorOutput());
        $this->assertSame(0, $result);
        $info = $this->assertThemeExists('themes/test_custom_theme');
        self::assertArrayNotHasKey('hidden', $info);
        self::assertArrayHasKey('generator', $info);
        self::assertEquals('starterkit_theme:1.20', $info['generator']);
    }
    
    /**
     * Tests the generate-theme command on a theme with a dev version number.
     */
    public function testContribStarterkitDevSnapshot() : void {
        // Change the version to a development snapshot version number, to simulate
        // using a contrib theme as the starterkit.
        $starterkit_info_yml = $this->getWorkspaceDirectory() . '/core/themes/starterkit_theme/starterkit_theme.info.yml';
        $info = Yaml::decode(file_get_contents($starterkit_info_yml));
        $info['core_version_requirement'] = '*';
        $info['version'] = '7.x-dev';
        file_put_contents($starterkit_info_yml, Yaml::encode($info));
        // Avoid the core git commit from being considered the source theme's: move
        // it out of core.
        Process::fromShellCommandline('mv core/themes/starterkit_theme themes/', $this->getWorkspaceDirectory())
            ->run();
        $process = $this->generateThemeFromStarterkit();
        $result = $process->run();
        $this->assertStringContainsString("The source theme starterkit_theme has a development version number (7.x-dev). Because it is not a git checkout, a specific commit could not be identified. This makes tracking changes in the source theme difficult. Are you sure you want to continue? (yes/no) [yes]:\n > Theme generated successfully to themes/test_custom_theme", trim($process->getOutput()), $process->getErrorOutput());
        $this->assertSame(0, $result);
        $info = $this->assertThemeExists('themes/test_custom_theme');
        self::assertArrayNotHasKey('hidden', $info);
        self::assertArrayHasKey('generator', $info);
        self::assertEquals('starterkit_theme:7.x-dev#unknown-commit', $info['generator']);
    }
    
    /**
     * Tests the generate-theme command on a theme with a dev version without git.
     */
    public function testContribStarterkitDevSnapshotWithGitNotInstalled() : void {
        // Change the version to a development snapshot version number, to simulate
        // using a contrib theme as the starterkit.
        $starterkit_info_yml = $this->getWorkspaceDirectory() . '/core/themes/starterkit_theme/starterkit_theme.info.yml';
        $info = Yaml::decode(file_get_contents($starterkit_info_yml));
        $info['core_version_requirement'] = '*';
        $info['version'] = '7.x-dev';
        file_put_contents($starterkit_info_yml, Yaml::encode($info));
        // Avoid the core git commit from being considered the source theme's: move
        // it out of core.
        Process::fromShellCommandline('mv core/themes/starterkit_theme themes/', $this->getWorkspaceDirectory())
            ->run();
        // Confirm that 'git' is available.
        $output = [];
        exec('git --help', $output, $status);
        $this->assertEquals(0, $status);
        // Modify our $PATH so that it begins with a path that contains an
        // executable script named 'git' that always exits with 127, as if git were
        // not found. Note that we run our tests using process isolation, so we do
        // not need to restore the PATH when we are done.
        $unavailableGitPath = $this->getWorkspaceDirectory() . '/bin';
        putenv('PATH=' . $unavailableGitPath . ':' . getenv('PATH'));
        mkdir($unavailableGitPath);
        $bash = <<<SH
#!/bin/bash
exit 127

SH;
        file_put_contents($unavailableGitPath . '/git', $bash);
        chmod($unavailableGitPath . '/git', 0755);
        // Confirm that 'git' is no longer available.
        $process = new Process([
            'git',
            '--help',
        ]);
        $process->run();
        $this->assertEquals(127, $process->getExitCode(), 'Fake git used by process.');
        $process = $this->generateThemeFromStarterkit([
            'PATH' => getenv('PATH'),
            'COLUMNS' => 80,
        ]);
        $result = $process->run();
        $this->assertEquals("[ERROR] The source theme starterkit_theme has a development version number     \n         (7.x-dev). Determining a specific commit is not possible because git is\n         not installed. Either install git or use a tagged release to generate a\n         theme.", trim($process->getErrorOutput()), $process->getErrorOutput());
        $this->assertSame(1, $result);
        $this->assertFileDoesNotExist($this->getWorkspaceDirectory() . "/themes/test_custom_theme");
    }
    
    /**
     * Tests the generate-theme command on a theme without a version number.
     */
    public function testCustomStarterkit() : void {
        // Omit the version, to simulate using a custom theme as the starterkit.
        $starterkit_info_yml = $this->getWorkspaceDirectory() . '/core/themes/starterkit_theme/starterkit_theme.info.yml';
        $info = Yaml::decode(file_get_contents($starterkit_info_yml));
        unset($info['version']);
        file_put_contents($starterkit_info_yml, Yaml::encode($info));
        $process = $this->generateThemeFromStarterkit();
        $result = $process->run();
        $this->assertStringContainsString("The source theme starterkit_theme does not have a version specified. This makes tracking changes in the source theme difficult. Are you sure you want to continue? (yes/no) [yes]:\n > Theme generated successfully to themes/test_custom_theme", trim($process->getOutput()), $process->getErrorOutput());
        $this->assertSame(0, $result);
        $info = $this->assertThemeExists('themes/test_custom_theme');
        self::assertArrayNotHasKey('hidden', $info);
        self::assertArrayHasKey('generator', $info);
        self::assertEquals('starterkit_theme:unknown-version', $info['generator']);
    }
    
    /**
     * Tests themes that do not exist return an error.
     */
    public function testThemeDoesNotExist() : void {
        $install_command = [
            $this->php,
            'core/scripts/drupal',
            'generate-theme',
            'test_custom_theme',
            '--name="Test custom starterkit theme"',
            '--description="Custom theme generated from a starterkit theme"',
            '--starterkit',
            'foobar',
        ];
        $process = new Process($install_command, NULL);
        $process->setTimeout(60);
        $result = $process->run();
        $this->assertStringContainsString('Theme source theme foobar cannot be found.', trim($process->getErrorOutput()));
        $this->assertSame(1, $result);
    }
    
    /**
     * Tests that only themes with `starterkit` flag can be used.
     */
    public function testStarterKitFlag() : void {
        // Explicitly not a starter theme.
        $install_command = [
            $this->php,
            'core/scripts/drupal',
            'generate-theme',
            'test_custom_theme',
            '--name="Test custom starterkit theme"',
            '--description="Custom theme generated from a starterkit theme"',
            '--starterkit',
            'stark',
        ];
        $process = new Process($install_command, NULL);
        $process->setTimeout(60);
        $result = $process->run();
        $this->assertStringContainsString('Theme source theme stark is not a valid starter kit.', trim($process->getErrorOutput()));
        $this->assertSame(1, $result);
        // Has not defined `starterkit`.
        $install_command = [
            $this->php,
            'core/scripts/drupal',
            'generate-theme',
            'test_custom_theme',
            '--name="Test custom starterkit theme"',
            '--description="Custom theme generated from a starterkit theme"',
            '--starterkit',
            'olivero',
        ];
        $process = new Process($install_command, NULL);
        $process->setTimeout(60);
        $result = $process->run();
        $this->assertStringContainsString('Theme source theme olivero is not a valid starter kit.', trim($process->getErrorOutput()));
        $this->assertSame(1, $result);
    }
    public function testDeleteDirectory() : void {
        $this->writeStarterkitConfig([
            'ignore' => [
                '/src/*',
                '/starterkit_theme.starterkit.yml',
            ],
        ]);
        $tester = $this->runCommand([
            'machine-name' => 'test_custom_theme',
            '--name' => 'Test custom starterkit theme',
            '--description' => 'Custom theme generated from a starterkit theme',
        ]);
        $tester->assertCommandIsSuccessful($tester->getErrorOutput());
        $this->assertThemeExists('themes/test_custom_theme');
        $theme_path_absolute = $this->getWorkspaceDirectory() . '/themes/test_custom_theme';
        self::assertDirectoryExists($theme_path_absolute);
        self::assertFileDoesNotExist($theme_path_absolute . '/src/StarterKit.php');
        self::assertDirectoryDoesNotExist($theme_path_absolute . '/src');
    }
    public function testNoEditMissingFilesWarning() : void {
        $this->writeStarterkitConfig([
            'no_edit' => [
                '/js/starterkit_theme.js',
            ],
        ]);
        $tester = $this->runCommand([
            'machine-name' => 'test_custom_theme',
            '--name' => 'Test custom starterkit theme',
            '--description' => 'Custom theme generated from a starterkit theme',
        ]);
        self::assertThat($tester->getStatusCode(), self::logicalNot(new CommandIsSuccessful()), trim($tester->getDisplay()));
        self::assertEquals('[ERROR] Paths were defined `no_edit` but no files found.', trim($tester->getErrorOutput()));
        $theme_path_absolute = $this->getWorkspaceDirectory() . '/themes/test_custom_theme';
        self::assertDirectoryDoesNotExist($theme_path_absolute);
    }
    public function testNoRenameMissingFilesWarning() : void {
        $this->writeStarterkitConfig([
            'no_rename' => [
                '/js/starterkit_theme.js',
            ],
        ]);
        $tester = $this->runCommand([
            'machine-name' => 'test_custom_theme',
            '--name' => 'Test custom starterkit theme',
            '--description' => 'Custom theme generated from a starterkit theme',
        ]);
        self::assertThat($tester->getStatusCode(), self::logicalNot(new CommandIsSuccessful()), trim($tester->getDisplay()));
        self::assertEquals('[ERROR] Paths were defined `no_rename` but no files found.', trim($tester->getErrorOutput()));
        $theme_path_absolute = $this->getWorkspaceDirectory() . '/themes/test_custom_theme';
        self::assertDirectoryDoesNotExist($theme_path_absolute);
    }
    public function testNoRename() : void {
        $this->writeStarterkitConfig([
            'no_rename' => [
                'js/starterkit_theme.js',
                '**/js/*.js',
                'js/**/*.js',
            ],
        ]);
        mkdir($this->getWorkspaceDirectory() . '/core/themes/starterkit_theme/js');
        mkdir($this->getWorkspaceDirectory() . '/core/themes/starterkit_theme/js/baz');
        file_put_contents($this->getWorkspaceDirectory() . '/core/themes/starterkit_theme/js/starterkit_theme.js', '');
        file_put_contents($this->getWorkspaceDirectory() . '/core/themes/starterkit_theme/js/starterkit_theme.foo.js', '');
        file_put_contents($this->getWorkspaceDirectory() . '/core/themes/starterkit_theme/js/baz/starterkit_theme.bar.js', '');
        $tester = $this->runCommand([
            'machine-name' => 'test_custom_theme',
            '--name' => 'Test custom starterkit theme',
            '--description' => 'Custom theme generated from a starterkit theme',
        ]);
        $tester->assertCommandIsSuccessful($tester->getErrorOutput());
        $this->assertThemeExists('themes/test_custom_theme');
        $theme_path_absolute = $this->getWorkspaceDirectory() . '/themes/test_custom_theme';
        self::assertFileExists($theme_path_absolute . '/js/starterkit_theme.js');
        self::assertFileExists($theme_path_absolute . '/js/starterkit_theme.foo.js');
        self::assertFileExists($theme_path_absolute . '/js/baz/starterkit_theme.bar.js');
    }
    public function testNoEdit() : void {
        $this->writeStarterkitConfig([
            'no_edit' => [
                '*no_edit_*',
            ],
        ]);
        $fixture = <<<FIXTURE
# machine_name
starterkit_theme
# label
Starterkit theme
# machine_class_name
StarterkitTheme
# label_class_name
StarterkitTheme
FIXTURE;
        file_put_contents($this->getWorkspaceDirectory() . '/core/themes/starterkit_theme/edit_fixture.txt', $fixture);
        file_put_contents($this->getWorkspaceDirectory() . '/core/themes/starterkit_theme/no_edit_fixture.txt', $fixture);
        file_put_contents($this->getWorkspaceDirectory() . '/core/themes/starterkit_theme/src/StarterkitThemePreRender.php', <<<PHP
<?php

namespace Drupal\\starterkit_theme;

use Drupal\\Core\\Security\\TrustedCallbackInterface;

/**
 * Implements trusted prerender callbacks for the Starterkit theme.
 *
 * @internal
 */
class StarterkitThemePreRender implements TrustedCallbackInterface {

}
PHP
);
        $tester = $this->runCommand([
            'machine-name' => 'test_custom_theme',
            '--name' => 'Test custom starterkit theme',
            '--description' => 'Custom theme generated from a starterkit theme',
        ]);
        $tester->assertCommandIsSuccessful($tester->getErrorOutput());
        $this->assertThemeExists('themes/test_custom_theme');
        $theme_path_absolute = $this->getWorkspaceDirectory() . '/themes/test_custom_theme';
        self::assertFileExists($theme_path_absolute . '/no_edit_fixture.txt');
        self::assertEquals($fixture, file_get_contents($theme_path_absolute . '/no_edit_fixture.txt'));
        self::assertFileExists($theme_path_absolute . '/edit_fixture.txt');
        self::assertEquals(<<<EDITED
# machine_name
test_custom_theme
# label
Test custom starterkit theme
# machine_class_name
TestCustomTheme
# label_class_name
TestCustomTheme
EDITED
, file_get_contents($theme_path_absolute . '/edit_fixture.txt'));
        self::assertEquals(<<<EDITED
<?php

namespace Drupal\\test_custom_theme;

use Drupal\\Core\\Security\\TrustedCallbackInterface;

/**
 * Implements trusted prerender callbacks for the Test custom starterkit theme.
 *
 * @internal
 */
class TestCustomThemePreRender implements TrustedCallbackInterface {

}
EDITED
, file_get_contents($theme_path_absolute . '/src/TestCustomThemePreRender.php'));
    }
    public function testInfoOverrides() : void {
        // Force `base theme` to be `false.
        $starterkit_info_yml = $this->getWorkspaceDirectory() . '/core/themes/starterkit_theme/starterkit_theme.info.yml';
        $info = Yaml::decode(file_get_contents($starterkit_info_yml));
        $info['base theme'] = FALSE;
        file_put_contents($starterkit_info_yml, Yaml::encode($info));
        $this->writeStarterkitConfig([
            'info' => [
                'libraries' => [
                    'core/jquery',
                ],
            ],
        ]);
        $tester = $this->runCommand([
            'machine-name' => 'test_custom_theme',
            '--name' => 'Test custom starterkit theme',
            '--description' => 'Custom theme generated from a starterkit theme',
        ]);
        $tester->assertCommandIsSuccessful($tester->getErrorOutput());
        $info = $this->assertThemeExists('themes/test_custom_theme');
        self::assertArrayHasKey('base theme', $info);
        self::assertFalse($info['base theme']);
        self::assertArrayHasKey('libraries', $info);
        self::assertEquals([
            'core/jquery',
        ], $info['libraries']);
    }
    public function testIncludeDotFiles() : void {
        file_put_contents($this->getWorkspaceDirectory() . '/core/themes/starterkit_theme/.gitignore', '*.map');
        $tester = $this->runCommand([
            'machine-name' => 'test_custom_theme',
            '--name' => 'Test custom starterkit theme',
            '--description' => 'Custom theme generated from a starterkit theme',
        ]);
        $tester->assertCommandIsSuccessful($tester->getErrorOutput());
        $this->assertThemeExists('themes/test_custom_theme');
        // Verify that the .gitignore file is present in the generated theme.
        $theme_path_absolute = $this->getWorkspaceDirectory() . '/themes/test_custom_theme';
        self::assertFileExists($theme_path_absolute . '/.gitignore');
    }
    private function writeStarterkitConfig(array $config) : void {
        $starterkit_yml = $this->getWorkspaceDirectory() . '/core/themes/starterkit_theme/starterkit_theme.starterkit.yml';
        $starterkit_config = Yaml::decode(file_get_contents($starterkit_yml));
        $starterkit_config = array_replace_recursive($starterkit_config, $config);
        file_put_contents($starterkit_yml, Yaml::encode($starterkit_config));
    }
    private function runCommand(array $input) : CommandTester {
        $tester = new CommandTester(new GenerateTheme(NULL, $this->getWorkspaceDirectory()));
        $tester->execute($input, [
            'capture_stderr_separately' => TRUE,
        ]);
        return $tester;
    }

}