class TimeZoneFormHelperTest

class TimeZoneFormHelperTest extends UnitTestCase {
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $container = new ContainerBuilder();
        $container->set('string_translation', $this->getStringTranslationStub());
        \Drupal::setContainer($container);
    }
    
    /**
     * @covers ::getOptionsList
     * @covers ::getOptionsListByRegion
     */
    public function testGetList() : void {
        // Test the default parameters for getOptionsList().
        $result = TimeZoneFormHelper::getOptionsList();
        $this->assertIsArray($result);
        $this->assertArrayHasKey('Africa/Dar_es_Salaam', $result);
        $this->assertEquals('Africa/Dar es Salaam', $result['Africa/Dar_es_Salaam']);
        // Test that the ungrouped and grouped results have the same number of
        // items.
        $ungrouped_count = count(TimeZoneFormHelper::getOptionsList());
        $grouped_result = TimeZoneFormHelper::getOptionsListByRegion();
        $grouped_count = 0;
        array_walk_recursive($grouped_result, function () use (&$grouped_count) {
            $grouped_count++;
        });
        $this->assertEquals($ungrouped_count, $grouped_count);
    }
    
    /**
     * @covers ::getOptionsListByRegion
     */
    public function testGetGroupedList() : void {
        // Tests time zone grouping.
        $result = TimeZoneFormHelper::getOptionsListByRegion();
        // Check a two-level time zone.
        $this->assertIsArray($result);
        $this->assertArrayHasKey('Africa', $result);
        $this->assertArrayHasKey('Africa/Dar_es_Salaam', $result['Africa']);
        $this->assertEquals('Dar es Salaam', $result['Africa']['Africa/Dar_es_Salaam']);
        // Check a three level time zone.
        $this->assertArrayHasKey('America', $result);
        $this->assertArrayHasKey('America/Indiana/Indianapolis', $result['America']);
        $this->assertEquals('Indianapolis (Indiana)', $result['America']['America/Indiana/Indianapolis']);
        // Make sure grouping hasn't erroneously created an entry with just the
        // first and second levels.
        $this->assertArrayNotHasKey('America/Indiana', $result['America']);
        // Make sure grouping hasn't duplicated an entry with just the first and
        // third levels.
        $this->assertArrayNotHasKey('America/Indianapolis', $result['America']);
        // Make sure that a grouped item isn't duplicated at the top level of the
        // results array.
        $this->assertArrayNotHasKey('America/Indiana/Indianapolis', $result);
    }

}