class OverlapWithTopLevelDependenciesTest

class OverlapWithTopLevelDependenciesTest extends TestCase {
    
    /**
     * Provides data for testOverlapWithTemplateProject().
     */
    public function templateProjectPathProvider() {
        return [
            [
                'composer/Template/RecommendedProject',
            ],
            [
                'composer/Template/LegacyProject',
            ],
        ];
    }
    
    /**
     * Tests top level and core-recommended dependencies do not overlap.
     *
     * @dataProvider templateProjectPathProvider
     *
     * @param string $template_project_path
     *   The path of the project template to test.
     */
    public function testOverlapWithTemplateProject($template_project_path) {
        $root = dirname(__DIR__, 6);
        // Read template project composer.json.
        $top_level_composer_json = json_decode(file_get_contents("{$root}/{$template_project_path}/composer.json"), TRUE);
        // Read drupal/core-recommended composer.json.
        $core_recommended_composer_json = json_decode(file_get_contents("{$root}/composer/Metapackage/CoreRecommended/composer.json"), TRUE);
        // Fail if any required project in the require section of the template
        // project also exists in core/recommended.
        foreach ($top_level_composer_json['require'] as $project => $version_constraint) {
            $this->assertArrayNotHasKey($project, $core_recommended_composer_json['require'], "Pinned project {$project} is also a top-level dependency of {$template_project_path}. This can expose a Composer bug. See https://www.drupal.org/project/drupal/issues/3134648 and https://github.com/composer/composer/issues/8882");
        }
    }

}