OptionsWidgetsTest.php

<?php

declare (strict_types=1);
namespace Drupal\Tests\options\Functional;

use Drupal\entity_test\Entity\EntityTest;
use Drupal\field\Entity\FieldConfig;
use Drupal\field\Entity\FieldStorageConfig;
use Drupal\Tests\field\Functional\FieldTestBase;

/**
 * Tests the Options widgets.
 *
 * @group options
 * @group #slow
 */
class OptionsWidgetsTest extends FieldTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'node',
        'options',
        'entity_test',
        'options_test',
        'taxonomy',
        'field_ui',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * A field storage with cardinality 1 to use in this test class.
     *
     * @var \Drupal\field\Entity\FieldStorageConfig
     */
    protected $card1;
    
    /**
     * A field storage with cardinality 2 to use in this test class.
     *
     * @var \Drupal\field\Entity\FieldStorageConfig
     */
    protected $card2;
    
    /**
     * A field storage with float values to use in this test class.
     *
     * @var \Drupal\field\Entity\FieldStorageConfig
     */
    protected $float;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        // Field storage with cardinality 1.
        $this->card1 = FieldStorageConfig::create([
            'field_name' => 'card_1',
            'entity_type' => 'entity_test',
            'type' => 'list_integer',
            'cardinality' => 1,
            'settings' => [
                'allowed_values' => [
                    // Make sure that 0 works as an option.
0 => 'Zero',
                    1 => 'One',
                    // Make sure that option text is properly sanitized.
2 => 'Some <script>dangerous</script> & unescaped <strong>markup</strong>',
                    // Make sure that HTML entities in option text are not double-encoded.
3 => 'Some HTML encoded markup with &lt; &amp; &gt;',
                ],
            ],
        ]);
        $this->card1
            ->save();
        // Field storage with cardinality 2.
        $this->card2 = FieldStorageConfig::create([
            'field_name' => 'card_2',
            'entity_type' => 'entity_test',
            'type' => 'list_integer',
            'cardinality' => 2,
            'settings' => [
                'allowed_values' => [
                    // Make sure that 0 works as an option.
0 => 'Zero',
                    1 => 'One',
                    // Make sure that option text is properly sanitized.
2 => 'Some <script>dangerous</script> & unescaped <strong>markup</strong>',
                ],
            ],
        ]);
        $this->card2
            ->save();
        // Field storage with list of float values.
        $this->float = FieldStorageConfig::create([
            'field_name' => 'float',
            'entity_type' => 'entity_test',
            'type' => 'list_float',
            'cardinality' => 1,
            'settings' => [
                'allowed_values' => [
                    '0.0' => '0.0',
                    '1.5' => '1.5',
                    '2.0' => '2.0',
                ],
            ],
        ]);
        $this->float
            ->save();
        // Create a web user.
        $this->drupalLogin($this->drupalCreateUser([
            'view test entity',
            'administer entity_test content',
        ]));
    }
    
    /**
     * Tests the 'options_buttons' widget (single select).
     */
    public function testRadioButtons() : void {
        // Create an instance of the 'single value' field.
        $field = FieldConfig::create([
            'field_storage' => $this->card1,
            'bundle' => 'entity_test',
        ]);
        $field->save();
        \Drupal::service('entity_display.repository')->getFormDisplay('entity_test', 'entity_test')
            ->setComponent($this->card1
            ->getName(), [
            'type' => 'options_buttons',
        ])
            ->save();
        // Create an entity.
        $entity = EntityTest::create([
            'user_id' => 1,
            'name' => $this->randomMachineName(),
        ]);
        $entity->save();
        $entity_init = clone $entity;
        // With no field data, no buttons are checked.
        $this->drupalGet('entity_test/manage/' . $entity->id() . '/edit');
        $this->assertSession()
            ->checkboxNotChecked('edit-card-1-0');
        $this->assertSession()
            ->checkboxNotChecked('edit-card-1-1');
        $this->assertSession()
            ->checkboxNotChecked('edit-card-1-2');
        $this->assertSession()
            ->responseContains('Some dangerous &amp; unescaped <strong>markup</strong>');
        $this->assertSession()
            ->responseContains('Some HTML encoded markup with &lt; &amp; &gt;');
        // Select first option.
        $edit = [
            'card_1' => 0,
        ];
        $this->submitForm($edit, 'Save');
        $this->assertFieldValues($entity_init, 'card_1', [
            0,
        ]);
        // Check that the selected button is checked.
        $this->drupalGet('entity_test/manage/' . $entity->id() . '/edit');
        $this->assertSession()
            ->checkboxChecked('edit-card-1-0');
        $this->assertSession()
            ->checkboxNotChecked('edit-card-1-1');
        $this->assertSession()
            ->checkboxNotChecked('edit-card-1-2');
        // Unselect option.
        $edit = [
            'card_1' => '_none',
        ];
        $this->submitForm($edit, 'Save');
        $this->assertFieldValues($entity_init, 'card_1', []);
        // Check that required radios with one option is auto-selected.
        $this->card1
            ->setSetting('allowed_values', [
            99 => 'Only allowed value',
        ]);
        $this->card1
            ->save();
        $field->setRequired(TRUE);
        $field->save();
        $this->drupalGet('entity_test/manage/' . $entity->id() . '/edit');
        $this->assertSession()
            ->checkboxChecked('edit-card-1-99');
    }
    
    /**
     * Tests the 'options_buttons' widget (multiple select).
     */
    public function testCheckBoxes() : void {
        // Create an instance of the 'multiple values' field.
        $field = FieldConfig::create([
            'field_storage' => $this->card2,
            'bundle' => 'entity_test',
        ]);
        $field->save();
        \Drupal::service('entity_display.repository')->getFormDisplay('entity_test', 'entity_test')
            ->setComponent($this->card2
            ->getName(), [
            'type' => 'options_buttons',
        ])
            ->save();
        // Create an entity.
        $entity = EntityTest::create([
            'user_id' => 1,
            'name' => $this->randomMachineName(),
        ]);
        $entity->save();
        $entity_init = clone $entity;
        // Display form: with no field data, nothing is checked.
        $this->drupalGet('entity_test/manage/' . $entity->id() . '/edit');
        $this->assertSession()
            ->checkboxNotChecked('edit-card-2-0');
        $this->assertSession()
            ->checkboxNotChecked('edit-card-2-1');
        $this->assertSession()
            ->checkboxNotChecked('edit-card-2-2');
        $this->assertSession()
            ->responseContains('Some dangerous &amp; unescaped <strong>markup</strong>');
        // Submit form: select first and third options.
        $edit = [
            'card_2[0]' => TRUE,
            'card_2[1]' => FALSE,
            'card_2[2]' => TRUE,
        ];
        $this->submitForm($edit, 'Save');
        $this->assertFieldValues($entity_init, 'card_2', [
            0,
            2,
        ]);
        // Display form: check that the right options are selected.
        $this->drupalGet('entity_test/manage/' . $entity->id() . '/edit');
        $this->assertSession()
            ->checkboxChecked('edit-card-2-0');
        $this->assertSession()
            ->checkboxNotChecked('edit-card-2-1');
        $this->assertSession()
            ->checkboxChecked('edit-card-2-2');
        // Submit form: select only first option.
        $edit = [
            'card_2[0]' => TRUE,
            'card_2[1]' => FALSE,
            'card_2[2]' => FALSE,
        ];
        $this->submitForm($edit, 'Save');
        $this->assertFieldValues($entity_init, 'card_2', [
            0,
        ]);
        // Display form: check that the right options are selected.
        $this->drupalGet('entity_test/manage/' . $entity->id() . '/edit');
        $this->assertSession()
            ->checkboxChecked('edit-card-2-0');
        $this->assertSession()
            ->checkboxNotChecked('edit-card-2-1');
        $this->assertSession()
            ->checkboxNotChecked('edit-card-2-2');
        // Submit form: select the three options while the field accepts only 2.
        $edit = [
            'card_2[0]' => TRUE,
            'card_2[1]' => TRUE,
            'card_2[2]' => TRUE,
        ];
        $this->submitForm($edit, 'Save');
        $this->assertSession()
            ->pageTextContains('this field cannot hold more than 2 values');
        // Submit form: uncheck all options.
        $edit = [
            'card_2[0]' => FALSE,
            'card_2[1]' => FALSE,
            'card_2[2]' => FALSE,
        ];
        $this->submitForm($edit, 'Save');
        // Check that the value was saved.
        $this->assertFieldValues($entity_init, 'card_2', []);
        // Required checkbox with one option is auto-selected.
        $this->card2
            ->setSetting('allowed_values', [
            99 => 'Only allowed value',
        ]);
        $this->card2
            ->save();
        $field->setRequired(TRUE);
        $field->save();
        $this->drupalGet('entity_test/manage/' . $entity->id() . '/edit');
        $this->assertSession()
            ->checkboxChecked('edit-card-2-99');
    }
    
    /**
     * Tests the 'options_select' widget (single select).
     */
    public function testSelectListSingle() : void {
        // Create an instance of the 'single value' field.
        $field = FieldConfig::create([
            'field_storage' => $this->card1,
            'bundle' => 'entity_test',
            'required' => TRUE,
        ]);
        $field->save();
        \Drupal::service('entity_display.repository')->getFormDisplay('entity_test', 'entity_test')
            ->setComponent($this->card1
            ->getName(), [
            'type' => 'options_select',
        ])
            ->save();
        // Create an entity.
        $entity = EntityTest::create([
            'user_id' => 1,
            'name' => $this->randomMachineName(),
        ]);
        $entity->save();
        $entity_init = clone $entity;
        // Display form.
        $this->drupalGet('entity_test/manage/' . $entity->id() . '/edit');
        // A required field without any value has a "none" option.
        $option = $this->assertSession()
            ->optionExists('edit-card-1', '_none');
        $this->assertSame('- Select a value -', $option->getText());
        // With no field data, nothing is selected.
        $this->assertTrue($this->assertSession()
            ->optionExists('card_1', '_none')
            ->isSelected());
        $this->assertFalse($this->assertSession()
            ->optionExists('card_1', 0)
            ->isSelected());
        $this->assertFalse($this->assertSession()
            ->optionExists('card_1', 1)
            ->isSelected());
        $this->assertFalse($this->assertSession()
            ->optionExists('card_1', 2)
            ->isSelected());
        $this->assertSession()
            ->responseContains('Some dangerous &amp; unescaped markup');
        // Submit form: select invalid 'none' option.
        $edit = [
            'card_1' => '_none',
        ];
        $this->submitForm($edit, 'Save');
        $this->assertSession()
            ->pageTextContains("{$field->getName()} field is required.");
        // Submit form: select first option.
        $edit = [
            'card_1' => 0,
        ];
        $this->submitForm($edit, 'Save');
        $this->assertFieldValues($entity_init, 'card_1', [
            0,
        ]);
        // Display form: check that the right options are selected.
        $this->drupalGet('entity_test/manage/' . $entity->id() . '/edit');
        // A required field with a value has no 'none' option.
        $this->assertSession()
            ->optionNotExists('edit-card-1', '_none');
        $this->assertTrue($this->assertSession()
            ->optionExists('card_1', 0)
            ->isSelected());
        $this->assertFalse($this->assertSession()
            ->optionExists('card_1', 1)
            ->isSelected());
        $this->assertFalse($this->assertSession()
            ->optionExists('card_1', 2)
            ->isSelected());
        // Make the field non required.
        $field->setRequired(FALSE);
        $field->save();
        // Display form.
        $this->drupalGet('entity_test/manage/' . $entity->id() . '/edit');
        // A non-required field has a 'none' option.
        $option = $this->assertSession()
            ->optionExists('edit-card-1', '_none');
        $this->assertSame('- None -', $option->getText());
        // Submit form: Unselect the option.
        $edit = [
            'card_1' => '_none',
        ];
        $this->drupalGet('entity_test/manage/' . $entity->id() . '/edit');
        $this->submitForm($edit, 'Save');
        $this->assertFieldValues($entity_init, 'card_1', []);
        // Test optgroups.
        $this->card1
            ->setSetting('allowed_values', []);
        $this->card1
            ->setSetting('allowed_values_function', 'options_test_allowed_values_callback');
        $this->card1
            ->save();
        // Display form: with no field data, nothing is selected
        $this->drupalGet('entity_test/manage/' . $entity->id() . '/edit');
        $this->assertFalse($this->assertSession()
            ->optionExists('card_1', 0)
            ->isSelected());
        $this->assertFalse($this->assertSession()
            ->optionExists('card_1', 1)
            ->isSelected());
        $this->assertFalse($this->assertSession()
            ->optionExists('card_1', 2)
            ->isSelected());
        $this->assertSession()
            ->responseContains('Some dangerous &amp; unescaped markup');
        $this->assertSession()
            ->responseContains('More &lt;script&gt;dangerous&lt;/script&gt; markup');
        $this->assertSession()
            ->responseContains('Group 1');
        // Submit form: select first option.
        $edit = [
            'card_1' => 0,
        ];
        $this->submitForm($edit, 'Save');
        $this->assertFieldValues($entity_init, 'card_1', [
            0,
        ]);
        // Display form: check that the right options are selected.
        $this->drupalGet('entity_test/manage/' . $entity->id() . '/edit');
        $this->assertTrue($this->assertSession()
            ->optionExists('card_1', 0)
            ->isSelected());
        $this->assertFalse($this->assertSession()
            ->optionExists('card_1', 1)
            ->isSelected());
        $this->assertFalse($this->assertSession()
            ->optionExists('card_1', 2)
            ->isSelected());
        // Submit form: Unselect the option.
        $edit = [
            'card_1' => '_none',
        ];
        $this->drupalGet('entity_test/manage/' . $entity->id() . '/edit');
        $this->submitForm($edit, 'Save');
        $this->assertFieldValues($entity_init, 'card_1', []);
    }
    
    /**
     * Tests the '#required_error' attribute for the select list.
     */
    public function testSelectListRequiredErrorAttribute() : void {
        // Enable form alter hook.
        \Drupal::state()->set('options_test.form_alter_enable', TRUE);
        // Create an instance of the 'single value' field.
        $field = FieldConfig::create([
            'field_storage' => $this->card1,
            'bundle' => 'entity_test',
            'required' => TRUE,
        ]);
        $field->save();
        \Drupal::service('entity_display.repository')->getFormDisplay('entity_test', 'entity_test')
            ->setComponent($this->card1
            ->getName(), [
            'type' => 'options_select',
        ])
            ->save();
        // Create an entity.
        $entity = EntityTest::create([
            'user_id' => 1,
            'name' => $this->randomMachineName(),
        ]);
        $entity->save();
        $this->drupalGet('entity_test/manage/' . $entity->id() . '/edit');
        // A required field without any value has a "none" option.
        $option = $this->assertSession()
            ->optionExists('edit-card-1', '_none');
        $this->assertSame('- Select a value -', $option->getText());
        // Submit form: select invalid 'none' option.
        $edit = [
            'card_1' => '_none',
        ];
        $this->submitForm($edit, 'Save');
        $this->assertSession()
            ->responseContains(t('This is custom message for required field.'));
    }
    
    /**
     * Tests the 'options_select' widget (multiple select).
     */
    public function testSelectListMultiple() : void {
        // Create an instance of the 'multiple values' field.
        $field = FieldConfig::create([
            'field_storage' => $this->card2,
            'bundle' => 'entity_test',
        ]);
        $field->save();
        \Drupal::service('entity_display.repository')->getFormDisplay('entity_test', 'entity_test')
            ->setComponent($this->card2
            ->getName(), [
            'type' => 'options_select',
        ])
            ->save();
        // Create an entity.
        $entity = EntityTest::create([
            'user_id' => 1,
            'name' => $this->randomMachineName(),
        ]);
        $entity->save();
        $entity_init = clone $entity;
        // Display form: with no field data, nothing is selected.
        $this->drupalGet('entity_test/manage/' . $entity->id() . '/edit');
        $this->assertTrue($this->assertSession()
            ->optionExists('card_2', '_none')
            ->isSelected());
        $this->assertFalse($this->assertSession()
            ->optionExists('card_2', 0)
            ->isSelected());
        $this->assertFalse($this->assertSession()
            ->optionExists('card_2', 1)
            ->isSelected());
        $this->assertFalse($this->assertSession()
            ->optionExists('card_2', 2)
            ->isSelected());
        $this->assertSession()
            ->responseContains('Some dangerous &amp; unescaped markup');
        // Submit form: select first and third options.
        $edit = [
            'card_2[]' => [
                0 => 0,
                2 => 2,
            ],
        ];
        $this->submitForm($edit, 'Save');
        $this->assertFieldValues($entity_init, 'card_2', [
            0,
            2,
        ]);
        // Display form: check that the right options are selected.
        $this->drupalGet('entity_test/manage/' . $entity->id() . '/edit');
        $this->assertTrue($this->assertSession()
            ->optionExists('card_2', 0)
            ->isSelected());
        $this->assertFalse($this->assertSession()
            ->optionExists('card_2', 1)
            ->isSelected());
        $this->assertTrue($this->assertSession()
            ->optionExists('card_2', 2)
            ->isSelected());
        // Submit form: select only first option.
        $edit = [
            'card_2[]' => [
                0 => 0,
            ],
        ];
        $this->submitForm($edit, 'Save');
        $this->assertFieldValues($entity_init, 'card_2', [
            0,
        ]);
        // Display form: check that the right options are selected.
        $this->drupalGet('entity_test/manage/' . $entity->id() . '/edit');
        $this->assertTrue($this->assertSession()
            ->optionExists('card_2', 0)
            ->isSelected());
        $this->assertFalse($this->assertSession()
            ->optionExists('card_2', 1)
            ->isSelected());
        $this->assertFalse($this->assertSession()
            ->optionExists('card_2', 2)
            ->isSelected());
        // Submit form: select the three options while the field accepts only 2.
        $edit = [
            'card_2[]' => [
                0 => 0,
                1 => 1,
                2 => 2,
            ],
        ];
        $this->submitForm($edit, 'Save');
        $this->assertSession()
            ->pageTextContains('this field cannot hold more than 2 values');
        // Submit form: uncheck all options.
        $edit = [
            'card_2[]' => [],
        ];
        $this->submitForm($edit, 'Save');
        $this->assertFieldValues($entity_init, 'card_2', []);
        // Test the 'None' option.
        // Check that the 'none' option has no effect if actual options are selected
        // as well.
        $edit = [
            'card_2[]' => [
                '_none' => '_none',
                0 => 0,
            ],
        ];
        $this->drupalGet('entity_test/manage/' . $entity->id() . '/edit');
        $this->submitForm($edit, 'Save');
        $this->assertFieldValues($entity_init, 'card_2', [
            0,
        ]);
        // Check that selecting the 'none' option empties the field.
        $edit = [
            'card_2[]' => [
                '_none' => '_none',
            ],
        ];
        $this->drupalGet('entity_test/manage/' . $entity->id() . '/edit');
        $this->submitForm($edit, 'Save');
        $this->assertFieldValues($entity_init, 'card_2', []);
        // A required select list does not have an empty key.
        $field->setRequired(TRUE);
        $field->save();
        $this->drupalGet('entity_test/manage/' . $entity->id() . '/edit');
        $this->assertEmpty($this->assertSession()
            ->selectExists('edit-card-2')
            ->find('xpath', 'option[@value=""]'));
        // We do not have to test that a required select list with one option is
        // auto-selected because the browser does it for us.
        // Test optgroups.
        // Use a callback function defining optgroups.
        $this->card2
            ->setSetting('allowed_values', []);
        $this->card2
            ->setSetting('allowed_values_function', 'options_test_allowed_values_callback');
        $this->card2
            ->save();
        $field->setRequired(FALSE);
        $field->save();
        // Display form: with no field data, nothing is selected.
        $this->drupalGet('entity_test/manage/' . $entity->id() . '/edit');
        $this->assertFalse($this->assertSession()
            ->optionExists('card_2', 0)
            ->isSelected());
        $this->assertFalse($this->assertSession()
            ->optionExists('card_2', 1)
            ->isSelected());
        $this->assertFalse($this->assertSession()
            ->optionExists('card_2', 2)
            ->isSelected());
        $this->assertSession()
            ->responseContains('Some dangerous &amp; unescaped markup');
        $this->assertSession()
            ->responseContains('More &lt;script&gt;dangerous&lt;/script&gt; markup');
        $this->assertSession()
            ->responseContains('Group 1');
        // Submit form: select first option.
        $edit = [
            'card_2[]' => [
                0 => 0,
            ],
        ];
        $this->submitForm($edit, 'Save');
        $this->assertFieldValues($entity_init, 'card_2', [
            0,
        ]);
        // Display form: check that the right options are selected.
        $this->drupalGet('entity_test/manage/' . $entity->id() . '/edit');
        $this->assertTrue($this->assertSession()
            ->optionExists('card_2', 0)
            ->isSelected());
        $this->assertFalse($this->assertSession()
            ->optionExists('card_2', 1)
            ->isSelected());
        $this->assertFalse($this->assertSession()
            ->optionExists('card_2', 2)
            ->isSelected());
        // Submit form: Unselect the option.
        $edit = [
            'card_2[]' => [
                '_none' => '_none',
            ],
        ];
        $this->drupalGet('entity_test/manage/' . $entity->id() . '/edit');
        $this->submitForm($edit, 'Save');
        $this->assertFieldValues($entity_init, 'card_2', []);
    }
    
    /**
     * Tests the 'options_select' widget (float values).
     */
    public function testSelectListFloat() : void {
        // Create an instance of the 'float value' field.
        $field = FieldConfig::create([
            'field_storage' => $this->float,
            'bundle' => 'entity_test',
            'required' => TRUE,
        ]);
        $field->save();
        $this->container
            ->get('entity_type.manager')
            ->getStorage('entity_form_display')
            ->load('entity_test.entity_test.default')
            ->setComponent($this->float
            ->getName(), [
            'type' => 'options_select',
        ])
            ->save();
        // Create an entity.
        $entity = EntityTest::create([
            'user_id' => 1,
            'name' => $this->randomMachineName(),
        ]);
        $entity->save();
        // Display form.
        $this->drupalGet('entity_test/manage/' . $entity->id() . '/edit');
        // With no field data, nothing is selected.
        $this->assertFalse($this->assertSession()
            ->optionExists('float', 0)
            ->isSelected());
        $this->assertFalse($this->assertSession()
            ->optionExists('float', 1.5)
            ->isSelected());
        $this->assertFalse($this->assertSession()
            ->optionExists('float', 2)
            ->isSelected());
        // Submit form.
        $edit = [
            'float' => 1.5,
        ];
        $this->submitForm($edit, 'Save');
        $this->assertFieldValues($entity, 'float', [
            1.5,
        ]);
        // Display form: check that the right options are selected.
        $this->drupalGet('entity_test/manage/' . $entity->id() . '/edit');
        $this->assertFalse($this->assertSession()
            ->optionExists('float', 0)
            ->isSelected());
        $this->assertTrue($this->assertSession()
            ->optionExists('float', 1.5)
            ->isSelected());
        $this->assertFalse($this->assertSession()
            ->optionExists('float', 2)
            ->isSelected());
    }
    
    /**
     * Tests the 'options_select' and 'options_button' widget for empty value.
     */
    public function testEmptyValue() : void {
        // Create an instance of the 'single value' field.
        $field = FieldConfig::create([
            'field_storage' => $this->card1,
            'bundle' => 'entity_test',
        ]);
        $field->save();
        
        /** @var \Drupal\Core\Entity\EntityDisplayRepositoryInterface $display_repository */
        $display_repository = \Drupal::service('entity_display.repository');
        // Change it to the check boxes/radio buttons widget.
        $display_repository->getFormDisplay('entity_test', 'entity_test')
            ->setComponent($this->card1
            ->getName(), [
            'type' => 'options_buttons',
        ])
            ->save();
        // Create an entity.
        $entity = EntityTest::create([
            'user_id' => 1,
            'name' => $this->randomMachineName(),
        ]);
        $entity->save();
        // Display form: check that _none options are present and has label.
        $this->drupalGet('entity_test/manage/' . $entity->id() . '/edit');
        // Verify that a test radio button has a "None" choice.
        $this->assertSession()
            ->elementExists('xpath', '//div[@id="edit-card-1"]//input[@value="_none"]');
        // Verify that a test radio button has a "N/A" choice..
        $this->assertSession()
            ->elementExists('xpath', '//div[@id="edit-card-1"]//label[@for="edit-card-1-none"]');
        $this->assertSession()
            ->elementTextEquals('xpath', '//div[@id="edit-card-1"]//label[@for="edit-card-1-none"]', "N/A");
        // Change it to the select widget.
        $display_repository->getFormDisplay('entity_test', 'entity_test')
            ->setComponent($this->card1
            ->getName(), [
            'type' => 'options_select',
        ])
            ->save();
        // Display form: check that _none options are present and has label.
        $this->drupalGet('entity_test/manage/' . $entity->id() . '/edit');
        // A required field without any value has a "none" option.
        $option = $this->assertSession()
            ->optionExists('edit-card-1', '_none');
        $this->assertSame('- None -', $option->getText());
    }
    
    /**
     * Tests hook_options_list_alter().
     *
     * @see options_test_options_list_alter()
     */
    public function testOptionsListAlter() : void {
        $field1 = FieldConfig::create([
            'field_storage' => $this->card1,
            'bundle' => 'entity_test',
        ]);
        $field1->save();
        // Create a new field that will be altered.
        $card4 = FieldStorageConfig::create([
            'field_name' => 'card_4',
            'entity_type' => 'entity_test',
            'type' => 'list_integer',
            'cardinality' => 1,
            'settings' => [
                'allowed_values' => [
                    0 => 'Zero',
                    1 => 'One',
                ],
            ],
        ]);
        $card4->save();
        $field2 = FieldConfig::create([
            'field_storage' => $card4,
            'bundle' => 'entity_test',
        ]);
        $field2->save();
        
        /** @var \Drupal\Core\Entity\EntityDisplayRepositoryInterface $display_repository */
        $display_repository = \Drupal::service('entity_display.repository');
        // Change it to the check boxes/radio buttons widget.
        $display_repository->getFormDisplay('entity_test', 'entity_test')
            ->setComponent($this->card1
            ->getName(), [
            'type' => 'options_select',
        ])
            ->setComponent($card4->getName(), [
            'type' => 'options_select',
        ])
            ->save();
        // Create an entity.
        $entity = EntityTest::create([
            'user_id' => 1,
            'name' => $this->randomMachineName(),
        ]);
        $entity->save();
        // Display form: check that _none options are present.
        $this->drupalGet('entity_test/manage/' . $entity->id() . '/edit');
        $xpath = '//select[@id=:id]//option[@value="_none" and text()=:label]';
        $xpath_args = [
            ':id' => 'edit-card-1',
            ':label' => '- None -',
        ];
        $this->assertSession()
            ->elementExists('xpath', $this->assertSession()
            ->buildXPathQuery($xpath, $xpath_args));
        $xpath_args = [
            ':id' => 'edit-card-4',
            ':label' => '- Select something -',
        ];
        $this->assertSession()
            ->elementExists('xpath', $this->assertSession()
            ->buildXPathQuery($xpath, $xpath_args));
        // Display form: check that options are displayed correctly.
        $this->assertSession()
            ->optionExists('card_1', 0);
        $this->assertSession()
            ->optionExists('card_1', 1);
        $this->assertSession()
            ->optionNotExists('card_4', 0);
        $this->assertSession()
            ->optionExists('card_4', 1);
    }

}