class DependencyTest

class DependencyTest extends ModuleTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * Checks functionality of project namespaces for dependencies.
     */
    public function testProjectNamespaceForDependencies() {
        $edit = [
            'modules[filter][enable]' => TRUE,
        ];
        $this->drupalPostForm('admin/modules', $edit, t('Install'));
        // Enable module with project namespace to ensure nothing breaks.
        $edit = [
            'modules[system_project_namespace_test][enable]' => TRUE,
        ];
        $this->drupalPostForm('admin/modules', $edit, t('Install'));
        $this->assertModules([
            'system_project_namespace_test',
        ], TRUE);
    }
    
    /**
     * Attempts to enable the Content Translation module without Language enabled.
     */
    public function testEnableWithoutDependency() {
        // Attempt to enable Content Translation without Language enabled.
        $edit = [];
        $edit['modules[content_translation][enable]'] = 'content_translation';
        $this->drupalPostForm('admin/modules', $edit, t('Install'));
        $this->assertText(t('Some required modules must be enabled'), 'Dependency required.');
        $this->assertModules([
            'content_translation',
            'language',
        ], FALSE);
        // Assert that the language tables weren't enabled.
        $this->assertTableCount('language', FALSE);
        $this->drupalPostForm(NULL, NULL, t('Continue'));
        $this->assertText(t('2 modules have been enabled: Content Translation, Language.'), 'Modules status has been updated.');
        $this->assertModules([
            'content_translation',
            'language',
        ], TRUE);
        // Assert that the language YAML files were created.
        $storage = $this->container
            ->get('config.storage');
        $this->assertNotEmpty($storage->listAll('language.entity.'), 'Language config entity files exist.');
    }
    
    /**
     * Attempts to enable a module with a missing dependency.
     */
    public function testMissingModules() {
        // Test that the system_dependencies_test module is marked
        // as missing a dependency.
        $this->drupalGet('admin/modules');
        $this->assertRaw(t('@module (<span class="admin-missing">missing</span>)', [
            '@module' => Unicode::ucfirst('_missing_dependency'),
        ]), 'A module with missing dependencies is marked as such.');
        $checkbox = $this->xpath('//input[@type="checkbox" and @disabled="disabled" and @name="modules[system_dependencies_test][enable]"]');
        $this->assertCount(1, $checkbox, 'Checkbox for the module is disabled.');
    }
    
    /**
     * Tests enabling a module that depends on an incompatible version of a module.
     */
    public function testIncompatibleModuleVersionDependency() {
        // Test that the system_incompatible_module_version_dependencies_test is
        // marked as having an incompatible dependency.
        $this->drupalGet('admin/modules');
        $this->assertRaw(t('@module (<span class="admin-missing">incompatible with</span> version @version)', [
            '@module' => 'System incompatible module version test (>2.0)',
            '@version' => '1.0',
        ]), 'A module that depends on an incompatible version of a module is marked as such.');
        $checkbox = $this->xpath('//input[@type="checkbox" and @disabled="disabled" and @name="modules[system_incompatible_module_version_dependencies_test][enable]"]');
        $this->assertCount(1, $checkbox, 'Checkbox for the module is disabled.');
    }
    
    /**
     * Tests enabling a module that depends on a module with an incompatible core version.
     */
    public function testIncompatibleCoreVersionDependency() {
        // Test that the system_incompatible_core_version_dependencies_test is
        // marked as having an incompatible dependency.
        $this->drupalGet('admin/modules');
        $this->assertRaw(t('@module (<span class="admin-missing">incompatible with</span> this version of Drupal core)', [
            '@module' => 'System incompatible core version test',
        ]), 'A module that depends on a module with an incompatible core version is marked as such.');
        $checkbox = $this->xpath('//input[@type="checkbox" and @disabled="disabled" and @name="modules[system_incompatible_core_version_dependencies_test][enable]"]');
        $this->assertCount(1, $checkbox, 'Checkbox for the module is disabled.');
    }
    
    /**
     * Tests failing PHP version requirements.
     */
    public function testIncompatiblePhpVersionDependency() {
        $this->drupalGet('admin/modules');
        $this->assertRaw('This module requires PHP version 6502.* and is incompatible with PHP version ' . phpversion() . '.', 'User is informed when the PHP dependency requirement of a module is not met.');
        $checkbox = $this->xpath('//input[@type="checkbox" and @disabled="disabled" and @name="modules[system_incompatible_php_version_test][enable]"]');
        $this->assertCount(1, $checkbox, 'Checkbox for the module is disabled.');
    }
    
    /**
     * Tests enabling modules with different core version specifications.
     */
    public function testCoreCompatibility() {
        $assert_session = $this->assertSession();
        // Test incompatible 'core_version_requirement'.
        $this->drupalGet('admin/modules');
        $assert_session->fieldDisabled('modules[system_incompatible_core_version_test_1x][enable]');
        $assert_session->fieldDisabled('modules[system_core_incompatible_semver_test][enable]');
        // Test compatible 'core_version_requirement' and compatible 'core'.
        $this->drupalGet('admin/modules');
        $assert_session->fieldEnabled('modules[common_test][enable]');
        $assert_session->fieldEnabled('modules[system_core_semver_test][enable]');
        // Ensure the modules can actually be installed.
        $edit['modules[common_test][enable]'] = 'common_test';
        $edit['modules[system_core_semver_test][enable]'] = 'system_core_semver_test';
        $this->drupalPostForm('admin/modules', $edit, t('Install'));
        $this->assertModules([
            'common_test',
            'system_core_semver_test',
        ], TRUE);
    }
    
    /**
     * Tests enabling a module that depends on a module which fails hook_requirements().
     */
    public function testEnableRequirementsFailureDependency() {
        \Drupal::service('module_installer')->install([
            'comment',
        ]);
        $this->assertModules([
            'requirements1_test',
        ], FALSE);
        $this->assertModules([
            'requirements2_test',
        ], FALSE);
        // Attempt to install both modules at the same time.
        $edit = [];
        $edit['modules[requirements1_test][enable]'] = 'requirements1_test';
        $edit['modules[requirements2_test][enable]'] = 'requirements2_test';
        $this->drupalPostForm('admin/modules', $edit, t('Install'));
        // Makes sure the modules were NOT installed.
        $this->assertText(t('Requirements 1 Test failed requirements'), 'Modules status has been updated.');
        $this->assertModules([
            'requirements1_test',
        ], FALSE);
        $this->assertModules([
            'requirements2_test',
        ], FALSE);
        // Makes sure that already enabled modules the failing modules depend on
        // were not disabled.
        $this->assertModules([
            'comment',
        ], TRUE);
    }
    
    /**
     * Tests that module dependencies are enabled in the correct order in the UI.
     *
     * Dependencies should be enabled before their dependents.
     */
    public function testModuleEnableOrder() {
        \Drupal::service('module_installer')->install([
            'module_test',
        ], FALSE);
        $this->resetAll();
        $this->assertModules([
            'module_test',
        ], TRUE);
        \Drupal::state()->set('module_test.dependency', 'dependency');
        // module_test creates a dependency chain:
        // - color depends on config
        // - config depends on help
        $expected_order = [
            'help',
            'config',
            'color',
        ];
        // Enable the modules through the UI, verifying that the dependency chain
        // is correct.
        $edit = [];
        $edit['modules[color][enable]'] = 'color';
        $this->drupalPostForm('admin/modules', $edit, t('Install'));
        $this->assertModules([
            'color',
        ], FALSE);
        // Note that dependencies are sorted alphabetically in the confirmation
        // message.
        $this->assertText(t('You must enable the Configuration Manager, Help modules to install Color.'));
        $edit['modules[config][enable]'] = 'config';
        $edit['modules[help][enable]'] = 'help';
        $this->drupalPostForm('admin/modules', $edit, t('Install'));
        $this->assertModules([
            'color',
            'config',
            'help',
        ], TRUE);
        // Check the actual order which is saved by module_test_modules_enabled().
        $module_order = \Drupal::state()->get('module_test.install_order') ?: [];
        $this->assertIdentical($module_order, $expected_order);
    }
    
    /**
     * Tests attempting to uninstall a module that has installed dependents.
     */
    public function testUninstallDependents() {
        // Enable the forum module.
        $edit = [
            'modules[forum][enable]' => 'forum',
        ];
        $this->drupalPostForm('admin/modules', $edit, t('Install'));
        $this->drupalPostForm(NULL, [], t('Continue'));
        $this->assertModules([
            'forum',
        ], TRUE);
        // Check that the comment module cannot be uninstalled.
        $this->drupalGet('admin/modules/uninstall');
        $checkbox = $this->xpath('//input[@type="checkbox" and @name="uninstall[comment]" and @disabled="disabled"]');
        $this->assertCount(1, $checkbox, 'Checkbox for uninstalling the comment module is disabled.');
        // Delete any forum terms.
        $vid = $this->config('forum.settings')
            ->get('vocabulary');
        // Ensure taxonomy has been loaded into the test-runner after forum was
        // enabled.
        \Drupal::moduleHandler()->load('taxonomy');
        $storage = \Drupal::entityTypeManager()->getStorage('taxonomy_term');
        $terms = $storage->loadByProperties([
            'vid' => $vid,
        ]);
        $storage->delete($terms);
        // Uninstall the forum module, and check that taxonomy now can also be
        // uninstalled.
        $edit = [
            'uninstall[forum]' => 'forum',
        ];
        $this->drupalPostForm('admin/modules/uninstall', $edit, t('Uninstall'));
        $this->drupalPostForm(NULL, NULL, t('Uninstall'));
        $this->assertText(t('The selected modules have been uninstalled.'), 'Modules status has been updated.');
        // Uninstall comment module.
        $edit = [
            'uninstall[comment]' => 'comment',
        ];
        $this->drupalPostForm('admin/modules/uninstall', $edit, t('Uninstall'));
        $this->drupalPostForm(NULL, NULL, t('Uninstall'));
        $this->assertText(t('The selected modules have been uninstalled.'), 'Modules status has been updated.');
    }

}