<?php

namespace Drupal\datetime\Tests;

use Drupal\Component\Utility\SafeMarkup;
use Drupal\Component\Utility\Unicode;
use Drupal\Core\Datetime\DrupalDateTime;
use Drupal\Core\Datetime\Entity\DateFormat;
use Drupal\entity_test\Entity\EntityTest;
use Drupal\field\Entity\FieldConfig;
use Drupal\field\Entity\FieldStorageConfig;
use Drupal\node\Entity\Node;

/**
 * Tests Datetime field functionality.
 *
 * @group datetime
 */
class DateTimeFieldTest extends DateTestBase {

  /**
   * The default display settings to use for the formatters.
   *
   * @var array
   */
  protected $defaultSettings = ['timezone_override' => ''];

  /**
   * {@inheritdoc}
   */
  protected function getTestFieldType() {
    return 'datetime';
  }

  /**
   * Tests date field functionality.
   */
  public function testDateField() {
    $field_name = $this->fieldStorage->getName();

    // Loop through defined timezones to test that date-only fields work at the
    // extremes.
    foreach (static::$timezones as $timezone) {

      $this->setSiteTimezone($timezone);

      // Display creation form.
      $this->drupalGet('entity_test/add');
      $this->assertFieldByName("{$field_name}[0][value][date]", '', 'Date element found.');
      $this->assertFieldByXPath('//*[@id="edit-' . $field_name . '-wrapper"]//label[contains(@class,"js-form-required")]', TRUE, 'Required markup found');
      $this->assertNoFieldByName("{$field_name}[0][value][time]", '', 'Time element not found.');
      $this->assertFieldByXPath('//input[@aria-describedby="edit-' . $field_name . '-0-value--description"]', NULL, 'ARIA described-by found');
      $this->assertFieldByXPath('//div[@id="edit-' . $field_name . '-0-value--description"]', NULL, 'ARIA description found');

      // Build up a date in the UTC timezone. Note that using this will also
      // mimic the user in a different timezone simply entering '2012-12-31' via
      // the UI.
      $value = '2012-12-31 00:00:00';
      $date = new DrupalDateTime($value, DATETIME_STORAGE_TIMEZONE);

      // Submit a valid date and ensure it is accepted.
      $date_format = DateFormat::load('html_date')->getPattern();
      $time_format = DateFormat::load('html_time')->getPattern();

      $edit = [
        "{$field_name}[0][value][date]" => $date->format($date_format),
      ];
      $this->drupalPostForm(NULL, $edit, t('Save'));
      preg_match('|entity_test/manage/(\d+)|', $this->url, $match);
      $id = $match[1];
      $this->assertText(t('entity_test @id has been created.', ['@id' => $id]));
      $this->assertRaw($date->format($date_format));
      $this->assertNoRaw($date->format($time_format));

      // Verify the date doesn't change if using a timezone that is UTC+12 when
      // the entity is edited through the form.
      $entity = EntityTest::load($id);
      $this->assertEqual('2012-12-31', $entity->{$field_name}->value);
      $this->drupalGet('entity_test/manage/' . $id . '/edit');
      $this->drupalPostForm(NULL, [], t('Save'));
      $this->drupalGet('entity_test/manage/' . $id . '/edit');
      $this->drupalPostForm(NULL, [], t('Save'));
      $this->drupalGet('entity_test/manage/' . $id . '/edit');
      $this->drupalPostForm(NULL, [], t('Save'));
      $entity = EntityTest::load($id);
      $this->assertEqual('2012-12-31', $entity->{$field_name}->value);

      // Reset display options since these get changed below.
      $this->displayOptions = [
        'type' => 'datetime_default',
        'label' => 'hidden',
        'settings' => ['format_type' => 'medium'] + $this->defaultSettings,
      ];
      // Verify that the date is output according to the formatter settings.
      $options = [
        'format_type' => ['short', 'medium', 'long'],
      ];
      // Formats that display a time component for date-only fields will display
      // the default time, so that is applied before calculating the expected
      // value.
      datetime_date_default_time($date);
      foreach ($options as $setting => $values) {
        foreach ($values as $new_value) {
          // Update the entity display settings.
          $this->displayOptions['settings'] = [$setting => $new_value] + $this->defaultSettings;
          entity_get_display($this->field->getTargetEntityTypeId(), $this->field->getTargetBundle(), 'full')
            ->setComponent($field_name, $this->displayOptions)
            ->save();

          $this->renderTestEntity($id);
          switch ($setting) {
            case 'format_type':
              // Verify that a date is displayed. Since this is a date-only
              // field, it is expected to display the time as 00:00:00.
              $expected = format_date($date->getTimestamp(), $new_value, '', DATETIME_STORAGE_TIMEZONE);
              $expected_iso = format_date($date->getTimestamp(), 'custom', 'Y-m-d\TH:i:s\Z', DATETIME_STORAGE_TIMEZONE);
              $this->renderTestEntity($id);
              $this->assertFieldByXPath('//time[@datetime="' . $expected_iso . '"]', $expected, SafeMarkup::format('Formatted date field using %value format displayed as %expected with %expected_iso attribute.', ['%value' => $new_value, '%expected' => $expected, '%expected_iso' => $expected_iso]));
              break;
          }
        }
      }

      // Verify that the plain formatter works.
      $this->displayOptions['type'] = 'datetime_plain';
      $this->displayOptions['settings'] = $this->defaultSettings;
      entity_get_display($this->field->getTargetEntityTypeId(), $this->field->getTargetBundle(), 'full')
        ->setComponent($field_name, $this->displayOptions)
        ->save();
      $expected = $date->format(DATETIME_DATE_STORAGE_FORMAT);
      $this->renderTestEntity($id);
      $this->assertText($expected, SafeMarkup::format('Formatted date field using plain format displayed as %expected.', ['%expected' => $expected]));

      // Verify that the 'datetime_custom' formatter works.
      $this->displayOptions['type'] = 'datetime_custom';
      $this->displayOptions['settings'] = ['date_format' => 'm/d/Y'] + $this->defaultSettings;
      entity_get_display($this->field->getTargetEntityTypeId(), $this->field->getTargetBundle(), 'full')
        ->setComponent($field_name, $this->displayOptions)
        ->save();
      $expected = $date->format($this->displayOptions['settings']['date_format']);
      $this->renderTestEntity($id);
      $this->assertText($expected, SafeMarkup::format('Formatted date field using datetime_custom format displayed as %expected.', ['%expected' => $expected]));

      // Verify that the 'datetime_time_ago' formatter works for intervals in the
      // past.  First update the test entity so that the date difference always
      // has the same interval.  Since the database always stores UTC, and the
      // interval will use this, force the test date to use UTC and not the local
      // or user timezome.
      $timestamp = REQUEST_TIME - 87654321;
      $entity = EntityTest::load($id);
      $field_name = $this->fieldStorage->getName();
      $date = DrupalDateTime::createFromTimestamp($timestamp, 'UTC');
      $entity->{$field_name}->value = $date->format($date_format);
      $entity->save();

      $this->displayOptions['type'] = 'datetime_time_ago';
      $this->displayOptions['settings'] = [
        'future_format' => '@interval in the future',
        'past_format' => '@interval in the past',
        'granularity' => 3,
      ];
      entity_get_display($this->field->getTargetEntityTypeId(), $this->field->getTargetBundle(), 'full')
        ->setComponent($field_name, $this->displayOptions)
        ->save();
      $expected = SafeMarkup::format($this->displayOptions['settings']['past_format'], [
        '@interval' => $this->dateFormatter->formatTimeDiffSince($timestamp, ['granularity' => $this->displayOptions['settings']['granularity']])
      ]);
      $this->renderTestEntity($id);
      $this->assertText($expected, SafeMarkup::format('Formatted date field using datetime_time_ago format displayed as %expected.', ['%expected' => $expected]));

      // Verify that the 'datetime_time_ago' formatter works for intervals in the
      // future.  First update the test entity so that the date difference always
      // has the same interval.  Since the database always stores UTC, and the
      // interval will use this, force the test date to use UTC and not the local
      // or user timezome.
      $timestamp = REQUEST_TIME + 87654321;
      $entity = EntityTest::load($id);
      $field_name = $this->fieldStorage->getName();
      $date = DrupalDateTime::createFromTimestamp($timestamp, 'UTC');
      $entity->{$field_name}->value = $date->format($date_format);
      $entity->save();

      entity_get_display($this->field->getTargetEntityTypeId(), $this->field->getTargetBundle(), 'full')
        ->setComponent($field_name, $this->displayOptions)
        ->save();
      $expected = SafeMarkup::format($this->displayOptions['settings']['future_format'], [
        '@interval' => $this->dateFormatter->formatTimeDiffUntil($timestamp, ['granularity' => $this->displayOptions['settings']['granularity']])
      ]);
      $this->renderTestEntity($id);
      $this->assertText($expected, SafeMarkup::format('Formatted date field using datetime_time_ago format displayed as %expected.', ['%expected' => $expected]));
    }
  }

  /**
   * Tests date and time field.
   */
  public function testDatetimeField() {
    $field_name = $this->fieldStorage->getName();
    // Change the field to a datetime field.
    $this->fieldStorage->setSetting('datetime_type', 'datetime');
    $this->fieldStorage->save();

    // Display creation form.
    $this->drupalGet('entity_test/add');
    $this->assertFieldByName("{$field_name}[0][value][date]", '', 'Date element found.');
    $this->assertFieldByName("{$field_name}[0][value][time]", '', 'Time element found.');
    $this->assertFieldByXPath('//fieldset[@id="edit-' . $field_name . '-0"]/legend//text()', $field_name, 'Fieldset and label found');
    $this->assertFieldByXPath('//fieldset[@aria-describedby="edit-' . $field_name . '-0--description"]', NULL, 'ARIA described-by found');
    $this->assertFieldByXPath('//div[@id="edit-' . $field_name . '-0--description"]', NULL, 'ARIA description found');

    // Build up a date in the UTC timezone.
    $value = '2012-12-31 00:00:00';
    $date = new DrupalDateTime($value, 'UTC');

    // Update the timezone to the system default.
    $date->setTimezone(timezone_open(drupal_get_user_timezone()));

    // Submit a valid date and ensure it is accepted.
    $date_format = DateFormat::load('html_date')->getPattern();
    $time_format = DateFormat::load('html_time')->getPattern();

    $edit = [
      "{$field_name}[0][value][date]" => $date->format($date_format),
      "{$field_name}[0][value][time]" => $date->format($time_format),
    ];
    $this->drupalPostForm(NULL, $edit, t('Save'));
    preg_match('|entity_test/manage/(\d+)|', $this->url, $match);
    $id = $match[1];
    $this->assertText(t('entity_test @id has been created.', ['@id' => $id]));
    $this->assertRaw($date->format($date_format));
    $this->assertRaw($date->format($time_format));

    // Verify that the date is output according to the formatter settings.
    $options = [
      'format_type' => ['short', 'medium', 'long'],
    ];
    foreach ($options as $setting => $values) {
      foreach ($values as $new_value) {
        // Update the entity display settings.
        $this->displayOptions['settings'] = [$setting => $new_value] + $this->defaultSettings;
        entity_get_display($this->field->getTargetEntityTypeId(), $this->field->getTargetBundle(), 'full')
          ->setComponent($field_name, $this->displayOptions)
          ->save();

        $this->renderTestEntity($id);
        switch ($setting) {
          case 'format_type':
            // Verify that a date is displayed.
            $expected = format_date($date->getTimestamp(), $new_value);
            $expected_iso = format_date($date->getTimestamp(), 'custom', 'Y-m-d\TH:i:s\Z', 'UTC');
            $this->renderTestEntity($id);
            $this->assertFieldByXPath('//time[@datetime="' . $expected_iso . '"]', $expected, SafeMarkup::format('Formatted date field using %value format displayed as %expected with %expected_iso attribute.', ['%value' => $new_value, '%expected' => $expected, '%expected_iso' => $expected_iso]));
            break;
        }
      }
    }

    // Verify that the plain formatter works.
    $this->displayOptions['type'] = 'datetime_plain';
    $this->displayOptions['settings'] = $this->defaultSettings;
    entity_get_display($this->field->getTargetEntityTypeId(), $this->field->getTargetBundle(), 'full')
      ->setComponent($field_name, $this->displayOptions)
      ->save();
    $expected = $date->format(DATETIME_DATETIME_STORAGE_FORMAT);
    $this->renderTestEntity($id);
    $this->assertText($expected, SafeMarkup::format('Formatted date field using plain format displayed as %expected.', ['%expected' => $expected]));

    // Verify that the 'datetime_custom' formatter works.
    $this->displayOptions['type'] = 'datetime_custom';
    $this->displayOptions['settings'] = ['date_format' => 'm/d/Y g:i:s A'] + $this->defaultSettings;
    entity_get_display($this->field->getTargetEntityTypeId(), $this->field->getTargetBundle(), 'full')
      ->setComponent($field_name, $this->displayOptions)
      ->save();
    $expected = $date->format($this->displayOptions['settings']['date_format']);
    $this->renderTestEntity($id);
    $this->assertText($expected, SafeMarkup::format('Formatted date field using datetime_custom format displayed as %expected.', ['%expected' => $expected]));

    // Verify that the 'timezone_override' setting works.
    $this->displayOptions['type'] = 'datetime_custom';
    $this->displayOptions['settings'] = ['date_format' => 'm/d/Y g:i:s A', 'timezone_override' => 'America/New_York'] + $this->defaultSettings;
    entity_get_display($this->field->getTargetEntityTypeId(), $this->field->getTargetBundle(), 'full')
      ->setComponent($field_name, $this->displayOptions)
      ->save();
    $expected = $date->format($this->displayOptions['settings']['date_format'], ['timezone' => 'America/New_York']);
    $this->renderTestEntity($id);
    $this->assertText($expected, SafeMarkup::format('Formatted date field using datetime_custom format displayed as %expected.', ['%expected' => $expected]));

    // Verify that the 'datetime_time_ago' formatter works for intervals in the
    // past.  First update the test entity so that the date difference always
    // has the same interval.  Since the database always stores UTC, and the
    // interval will use this, force the test date to use UTC and not the local
    // or user timezome.
    $timestamp = REQUEST_TIME - 87654321;
    $entity = EntityTest::load($id);
    $field_name = $this->fieldStorage->getName();
    $date = DrupalDateTime::createFromTimestamp($timestamp, 'UTC');
    $entity->{$field_name}->value = $date->format(DATETIME_DATETIME_STORAGE_FORMAT);
    $entity->save();

    $this->displayOptions['type'] = 'datetime_time_ago';
    $this->displayOptions['settings'] = [
      'future_format' => '@interval from now',
      'past_format' => '@interval earlier',
      'granularity' => 3,
    ];
    entity_get_display($this->field->getTargetEntityTypeId(), $this->field->getTargetBundle(), 'full')
      ->setComponent($field_name, $this->displayOptions)
      ->save();
    $expected = SafeMarkup::format($this->displayOptions['settings']['past_format'], [
      '@interval' => $this->dateFormatter->formatTimeDiffSince($timestamp, ['granularity' => $this->displayOptions['settings']['granularity']])
    ]);
    $this->renderTestEntity($id);
    $this->assertText($expected, SafeMarkup::format('Formatted date field using datetime_time_ago format displayed as %expected.', ['%expected' => $expected]));

    // Verify that the 'datetime_time_ago' formatter works for intervals in the
    // future.  First update the test entity so that the date difference always
    // has the same interval.  Since the database always stores UTC, and the
    // interval will use this, force the test date to use UTC and not the local
    // or user timezome.
    $timestamp = REQUEST_TIME + 87654321;
    $entity = EntityTest::load($id);
    $field_name = $this->fieldStorage->getName();
    $date = DrupalDateTime::createFromTimestamp($timestamp, 'UTC');
    $entity->{$field_name}->value = $date->format(DATETIME_DATETIME_STORAGE_FORMAT);
    $entity->save();

    entity_get_display($this->field->getTargetEntityTypeId(), $this->field->getTargetBundle(), 'full')
      ->setComponent($field_name, $this->displayOptions)
      ->save();
    $expected = SafeMarkup::format($this->displayOptions['settings']['future_format'], [
      '@interval' => $this->dateFormatter->formatTimeDiffUntil($timestamp, ['granularity' => $this->displayOptions['settings']['granularity']])
    ]);
    $this->renderTestEntity($id);
    $this->assertText($expected, SafeMarkup::format('Formatted date field using datetime_time_ago format displayed as %expected.', ['%expected' => $expected]));
  }

  /**
   * Tests Date List Widget functionality.
   */
  public function testDatelistWidget() {
    $field_name = $this->fieldStorage->getName();

    // Ensure field is set to a date only field.
    $this->fieldStorage->setSetting('datetime_type', 'date');
    $this->fieldStorage->save();

    // Change the widget to a datelist widget.
    entity_get_form_display($this->field->getTargetEntityTypeId(), $this->field->getTargetBundle(), 'default')
      ->setComponent($field_name, [
        'type' => 'datetime_datelist',
        'settings' => [
          'date_order' => 'YMD',
        ],
      ])
      ->save();
    \Drupal::entityManager()->clearCachedFieldDefinitions();

    // Display creation form.
    $this->drupalGet('entity_test/add');
    $this->assertFieldByXPath('//fieldset[@id="edit-' . $field_name . '-0"]/legend//text()', $field_name, 'Fieldset and label found');
    $this->assertFieldByXPath('//fieldset[@aria-describedby="edit-' . $field_name . '-0--description"]', NULL, 'ARIA described-by found');
    $this->assertFieldByXPath('//div[@id="edit-' . $field_name . '-0--description"]', NULL, 'ARIA description found');

    // Assert that Hour and Minute Elements do not appear on Date Only
    $this->assertNoFieldByXPath("//*[@id=\"edit-$field_name-0-value-hour\"]", NULL, 'Hour element not found on Date Only.');
    $this->assertNoFieldByXPath("//*[@id=\"edit-$field_name-0-value-minute\"]", NULL, 'Minute element not found on Date Only.');

    // Go to the form display page to assert that increment option does not appear on Date Only
    $fieldEditUrl = 'entity_test/structure/entity_test/form-display';
    $this->drupalGet($fieldEditUrl);

    // Click on the widget settings button to open the widget settings form.
    $this->drupalPostAjaxForm(NULL, [], $field_name . "_settings_edit");
    $xpathIncr = "//select[starts-with(@id, \"edit-fields-$field_name-settings-edit-form-settings-increment\")]";
    $this->assertNoFieldByXPath($xpathIncr, NULL, 'Increment element not found for Date Only.');

    // Change the field to a datetime field.
    $this->fieldStorage->setSetting('datetime_type', 'datetime');
    $this->fieldStorage->save();

    // Change the widget to a datelist widget.
    entity_get_form_display($this->field->getTargetEntityTypeId(), $this->field->getTargetBundle(), 'default')
      ->setComponent($field_name, [
        'type' => 'datetime_datelist',
        'settings' => [
          'increment' => 1,
          'date_order' => 'YMD',
          'time_type' => '12',
        ],
      ])
      ->save();
    \Drupal::entityManager()->clearCachedFieldDefinitions();

    // Go to the form display page to assert that increment option does appear on Date Time
    $fieldEditUrl = 'entity_test/structure/entity_test/form-display';
    $this->drupalGet($fieldEditUrl);

    // Click on the widget settings button to open the widget settings form.
    $this->drupalPostAjaxForm(NULL, [], $field_name . "_settings_edit");
    $this->assertFieldByXPath($xpathIncr, NULL, 'Increment element found for Date and time.');

    // Display creation form.
    $this->drupalGet('entity_test/add');

    $this->assertFieldByXPath("//*[@id=\"edit-$field_name-0-value-year\"]", NULL, 'Year element found.');
    $this->assertOptionSelected("edit-$field_name-0-value-year", '', 'No year selected.');
    $this->assertOptionByText("edit-$field_name-0-value-year", t('Year'));
    $this->assertFieldByXPath("//*[@id=\"edit-$field_name-0-value-month\"]", NULL, 'Month element found.');
    $this->assertOptionSelected("edit-$field_name-0-value-month", '', 'No month selected.');
    $this->assertOptionByText("edit-$field_name-0-value-month", t('Month'));
    $this->assertFieldByXPath("//*[@id=\"edit-$field_name-0-value-day\"]", NULL, 'Day element found.');
    $this->assertOptionSelected("edit-$field_name-0-value-day", '', 'No day selected.');
    $this->assertOptionByText("edit-$field_name-0-value-day", t('Day'));
    $this->assertFieldByXPath("//*[@id=\"edit-$field_name-0-value-hour\"]", NULL, 'Hour element found.');
    $this->assertOptionSelected("edit-$field_name-0-value-hour", '', 'No hour selected.');
    $this->assertOptionByText("edit-$field_name-0-value-hour", t('Hour'));
    $this->assertFieldByXPath("//*[@id=\"edit-$field_name-0-value-minute\"]", NULL, 'Minute element found.');
    $this->assertOptionSelected("edit-$field_name-0-value-minute", '', 'No minute selected.');
    $this->assertOptionByText("edit-$field_name-0-value-minute", t('Minute'));
    $this->assertNoFieldByXPath("//*[@id=\"edit-$field_name-0-value-second\"]", NULL, 'Second element not found.');
    $this->assertFieldByXPath("//*[@id=\"edit-$field_name-0-value-ampm\"]", NULL, 'AMPM element found.');
    $this->assertOptionSelected("edit-$field_name-0-value-ampm", '', 'No ampm selected.');
    $this->assertOptionByText("edit-$field_name-0-value-ampm", t('AM/PM'));

    // Submit a valid date and ensure it is accepted.
    $date_value = ['year' => 2012, 'month' => 12, 'day' => 31, 'hour' => 5, 'minute' => 15];

    $edit = [];
    // Add the ampm indicator since we are testing 12 hour time.
    $date_value['ampm'] = 'am';
    foreach ($date_value as $part => $value) {
      $edit["{$field_name}[0][value][$part]"] = $value;
    }

    $this->drupalPostForm(NULL, $edit, t('Save'));
    preg_match('|entity_test/manage/(\d+)|', $this->url, $match);
    $id = $match[1];
    $this->assertText(t('entity_test @id has been created.', ['@id' => $id]));

    $this->assertOptionSelected("edit-$field_name-0-value-year", '2012', 'Correct year selected.');
    $this->assertOptionSelected("edit-$field_name-0-value-month", '12', 'Correct month selected.');
    $this->assertOptionSelected("edit-$field_name-0-value-day", '31', 'Correct day selected.');
    $this->assertOptionSelected("edit-$field_name-0-value-hour", '5', 'Correct hour selected.');
    $this->assertOptionSelected("edit-$field_name-0-value-minute", '15', 'Correct minute selected.');
    $this->assertOptionSelected("edit-$field_name-0-value-ampm", 'am', 'Correct ampm selected.');

    // Test the widget using increment other than 1 and 24 hour mode.
    entity_get_form_display($this->field->getTargetEntityTypeId(), $this->field->getTargetBundle(), 'default')
      ->setComponent($field_name, [
        'type' => 'datetime_datelist',
        'settings' => [
          'increment' => 15,
          'date_order' => 'YMD',
          'time_type' => '24',
        ],
      ])
      ->save();
    \Drupal::entityManager()->clearCachedFieldDefinitions();

    // Display creation form.
    $this->drupalGet('entity_test/add');

    // Other elements are unaffected by the changed settings.
    $this->assertFieldByXPath("//*[@id=\"edit-$field_name-0-value-hour\"]", NULL, 'Hour element found.');
    $this->assertOptionSelected("edit-$field_name-0-value-hour", '', 'No hour selected.');
    $this->assertNoFieldByXPath("//*[@id=\"edit-$field_name-0-value-ampm\"]", NULL, 'AMPM element not found.');

    // Submit a valid date and ensure it is accepted.
    $date_value = ['year' => 2012, 'month' => 12, 'day' => 31, 'hour' => 17, 'minute' => 15];

    $edit = [];
    foreach ($date_value as $part => $value) {
      $edit["{$field_name}[0][value][$part]"] = $value;
    }

    $this->drupalPostForm(NULL, $edit, t('Save'));
    preg_match('|entity_test/manage/(\d+)|', $this->url, $match);
    $id = $match[1];
    $this->assertText(t('entity_test @id has been created.', ['@id' => $id]));

    $this->assertOptionSelected("edit-$field_name-0-value-year", '2012', 'Correct year selected.');
    $this->assertOptionSelected("edit-$field_name-0-value-month", '12', 'Correct month selected.');
    $this->assertOptionSelected("edit-$field_name-0-value-day", '31', 'Correct day selected.');
    $this->assertOptionSelected("edit-$field_name-0-value-hour", '17', 'Correct hour selected.');
    $this->assertOptionSelected("edit-$field_name-0-value-minute", '15', 'Correct minute selected.');

    // Test the widget for partial completion of fields.
    entity_get_form_display($this->field->getTargetEntityTypeId(), $this->field->getTargetBundle(), 'default')
      ->setComponent($field_name, [
        'type' => 'datetime_datelist',
        'settings' => [
          'increment' => 1,
          'date_order' => 'YMD',
          'time_type' => '24',
        ],
      ])
      ->save();
    \Drupal::entityManager()->clearCachedFieldDefinitions();

    // Test the widget for validation notifications.
    foreach ($this->datelistDataProvider() as $data) {
      list($date_value, $expected) = $data;

      // Display creation form.
      $this->drupalGet('entity_test/add');

      // Submit a partial date and ensure and error message is provided.
      $edit = [];
      foreach ($date_value as $part => $value) {
        $edit["{$field_name}[0][value][$part]"] = $value;
      }

      $this->drupalPostForm(NULL, $edit, t('Save'));
      $this->assertResponse(200);
      foreach ($expected as $expected_text) {
        $this->assertText(t($expected_text));
      }
    }

    // Test the widget for complete input with zeros as part of selections.
    $this->drupalGet('entity_test/add');

    $date_value = ['year' => 2012, 'month' => '12', 'day' => '31', 'hour' => '0', 'minute' => '0'];
    $edit = [];
    foreach ($date_value as $part => $value) {
      $edit["{$field_name}[0][value][$part]"] = $value;
    }

    $this->drupalPostForm(NULL, $edit, t('Save'));
    $this->assertResponse(200);
    preg_match('|entity_test/manage/(\d+)|', $this->url, $match);
    $id = $match[1];
    $this->assertText(t('entity_test @id has been created.', ['@id' => $id]));

    // Test the widget to ensure zeros are not deselected on validation.
    $this->drupalGet('entity_test/add');

    $date_value = ['year' => 2012, 'month' => '12', 'day' => '31', 'hour' => '', 'minute' => '0'];
    $edit = [];
    foreach ($date_value as $part => $value) {
      $edit["{$field_name}[0][value][$part]"] = $value;
    }

    $this->drupalPostForm(NULL, $edit, t('Save'));
    $this->assertResponse(200);
    $this->assertOptionSelected("edit-$field_name-0-value-minute", '0', 'Correct minute selected.');
  }

  /**
   * The data provider for testing the validation of the datelist widget.
   *
   * @return array
   *   An array of datelist input permutations to test.
   */
  protected function datelistDataProvider() {
    return [
      // Year only selected, validation error on Month, Day, Hour, Minute.
      [['year' => 2012, 'month' => '', 'day' => '', 'hour' => '', 'minute' => ''], [
        'A value must be selected for month.',
        'A value must be selected for day.',
        'A value must be selected for hour.',
        'A value must be selected for minute.',
      ]],
      // Year and Month selected, validation error on Day, Hour, Minute.
      [['year' => 2012, 'month' => '12', 'day' => '', 'hour' => '', 'minute' => ''], [
        'A value must be selected for day.',
        'A value must be selected for hour.',
        'A value must be selected for minute.',
      ]],
      // Year, Month and Day selected, validation error on Hour, Minute.
      [['year' => 2012, 'month' => '12', 'day' => '31', 'hour' => '', 'minute' => ''], [
        'A value must be selected for hour.',
        'A value must be selected for minute.',
      ]],
      // Year, Month, Day and Hour selected, validation error on Minute only.
      [['year' => 2012, 'month' => '12', 'day' => '31', 'hour' => '0', 'minute' => ''], [
        'A value must be selected for minute.',
      ]],
    ];
  }

  /**
   * Test default value functionality.
   */
  public function testDefaultValue() {
    // Create a test content type.
    $this->drupalCreateContentType(['type' => 'date_content']);

    // Create a field storage with settings to validate.
    $field_name = Unicode::strtolower($this->randomMachineName());
    $field_storage = FieldStorageConfig::create([
      'field_name' => $field_name,
      'entity_type' => 'node',
      'type' => 'datetime',
      'settings' => ['datetime_type' => 'date'],
    ]);
    $field_storage->save();

    $field = FieldConfig::create([
      'field_storage' => $field_storage,
      'bundle' => 'date_content',
    ]);
    $field->save();

    // Loop through defined timezones to test that date-only defaults work at
    // the extremes.
    foreach (static::$timezones as $timezone) {

      $this->setSiteTimezone($timezone);

      // Set now as default_value.
      $field_edit = [
        'default_value_input[default_date_type]' => 'now',
      ];
      $this->drupalPostForm('admin/structure/types/manage/date_content/fields/node.date_content.' . $field_name, $field_edit, t('Save settings'));

      // Check that default value is selected in default value form.
      $this->drupalGet('admin/structure/types/manage/date_content/fields/node.date_content.' . $field_name);
      $this->assertOptionSelected('edit-default-value-input-default-date-type', 'now', 'The default value is selected in instance settings page');
      $this->assertFieldByName('default_value_input[default_date]', '', 'The relative default value is empty in instance settings page');

      // Check if default_date has been stored successfully.
      $config_entity = $this->config('field.field.node.date_content.' . $field_name)
        ->get();
      $this->assertEqual($config_entity['default_value'][0], [
        'default_date_type' => 'now',
        'default_date' => 'now',
      ], 'Default value has been stored successfully');

      // Clear field cache in order to avoid stale cache values.
      \Drupal::entityManager()->clearCachedFieldDefinitions();

      // Create a new node to check that datetime field default value is today.
      $new_node = Node::create(['type' => 'date_content']);
      $expected_date = new DrupalDateTime('now', drupal_get_user_timezone());
      $this->assertEqual($new_node->get($field_name)
        ->offsetGet(0)->value, $expected_date->format(DATETIME_DATE_STORAGE_FORMAT));

      // Set an invalid relative default_value to test validation.
      $field_edit = [
        'default_value_input[default_date_type]' => 'relative',
        'default_value_input[default_date]' => 'invalid date',
      ];
      $this->drupalPostForm('admin/structure/types/manage/date_content/fields/node.date_content.' . $field_name, $field_edit, t('Save settings'));

      $this->assertText('The relative date value entered is invalid.');

      // Set a relative default_value.
      $field_edit = [
        'default_value_input[default_date_type]' => 'relative',
        'default_value_input[default_date]' => '+90 days',
      ];
      $this->drupalPostForm('admin/structure/types/manage/date_content/fields/node.date_content.' . $field_name, $field_edit, t('Save settings'));

      // Check that default value is selected in default value form.
      $this->drupalGet('admin/structure/types/manage/date_content/fields/node.date_content.' . $field_name);
      $this->assertOptionSelected('edit-default-value-input-default-date-type', 'relative', 'The default value is selected in instance settings page');
      $this->assertFieldByName('default_value_input[default_date]', '+90 days', 'The relative default value is displayed in instance settings page');

      // Check if default_date has been stored successfully.
      $config_entity = $this->config('field.field.node.date_content.' . $field_name)
        ->get();
      $this->assertEqual($config_entity['default_value'][0], [
        'default_date_type' => 'relative',
        'default_date' => '+90 days',
      ], 'Default value has been stored successfully');

      // Clear field cache in order to avoid stale cache values.
      \Drupal::entityManager()->clearCachedFieldDefinitions();

      // Create a new node to check that datetime field default value is +90
      // days.
      $new_node = Node::create(['type' => 'date_content']);
      $expected_date = new DrupalDateTime('+90 days', drupal_get_user_timezone());
      $this->assertEqual($new_node->get($field_name)
        ->offsetGet(0)->value, $expected_date->format(DATETIME_DATE_STORAGE_FORMAT));

      // Remove default value.
      $field_edit = [
        'default_value_input[default_date_type]' => '',
      ];
      $this->drupalPostForm('admin/structure/types/manage/date_content/fields/node.date_content.' . $field_name, $field_edit, t('Save settings'));

      // Check that default value is selected in default value form.
      $this->drupalGet('admin/structure/types/manage/date_content/fields/node.date_content.' . $field_name);
      $this->assertOptionSelected('edit-default-value-input-default-date-type', '', 'The default value is selected in instance settings page');
      $this->assertFieldByName('default_value_input[default_date]', '', 'The relative default value is empty in instance settings page');

      // Check if default_date has been stored successfully.
      $config_entity = $this->config('field.field.node.date_content.' . $field_name)
        ->get();
      $this->assertTrue(empty($config_entity['default_value']), 'Empty default value has been stored successfully');

      // Clear field cache in order to avoid stale cache values.
      \Drupal::entityManager()->clearCachedFieldDefinitions();

      // Create a new node to check that datetime field default value is not
      // set.
      $new_node = Node::create(['type' => 'date_content']);
      $this->assertNull($new_node->get($field_name)->value, 'Default value is not set');
    }
  }

  /**
   * Test that invalid values are caught and marked as invalid.
   */
  public function testInvalidField() {
    // Change the field to a datetime field.
    $this->fieldStorage->setSetting('datetime_type', 'datetime');
    $this->fieldStorage->save();
    $field_name = $this->fieldStorage->getName();

    // Display creation form.
    $this->drupalGet('entity_test/add');
    $this->assertFieldByName("{$field_name}[0][value][date]", '', 'Date element found.');
    $this->assertFieldByName("{$field_name}[0][value][time]", '', 'Time element found.');

    // Submit invalid dates and ensure they is not accepted.
    $date_value = '';
    $edit = [
      "{$field_name}[0][value][date]" => $date_value,
      "{$field_name}[0][value][time]" => '12:00:00',
    ];
    $this->drupalPostForm(NULL, $edit, t('Save'));
    $this->assertText('date is invalid', 'Empty date value has been caught.');

    $date_value = 'aaaa-12-01';
    $edit = [
      "{$field_name}[0][value][date]" => $date_value,
      "{$field_name}[0][value][time]" => '00:00:00',
    ];
    $this->drupalPostForm(NULL, $edit, t('Save'));
    $this->assertText('date is invalid', format_string('Invalid year value %date has been caught.', ['%date' => $date_value]));

    $date_value = '2012-75-01';
    $edit = [
      "{$field_name}[0][value][date]" => $date_value,
      "{$field_name}[0][value][time]" => '00:00:00',
    ];
    $this->drupalPostForm(NULL, $edit, t('Save'));
    $this->assertText('date is invalid', format_string('Invalid month value %date has been caught.', ['%date' => $date_value]));

    $date_value = '2012-12-99';
    $edit = [
      "{$field_name}[0][value][date]" => $date_value,
      "{$field_name}[0][value][time]" => '00:00:00',
    ];
    $this->drupalPostForm(NULL, $edit, t('Save'));
    $this->assertText('date is invalid', format_string('Invalid day value %date has been caught.', ['%date' => $date_value]));

    $date_value = '2012-12-01';
    $time_value = '';
    $edit = [
      "{$field_name}[0][value][date]" => $date_value,
      "{$field_name}[0][value][time]" => $time_value,
    ];
    $this->drupalPostForm(NULL, $edit, t('Save'));
    $this->assertText('date is invalid', 'Empty time value has been caught.');

    $date_value = '2012-12-01';
    $time_value = '49:00:00';
    $edit = [
      "{$field_name}[0][value][date]" => $date_value,
      "{$field_name}[0][value][time]" => $time_value,
    ];
    $this->drupalPostForm(NULL, $edit, t('Save'));
    $this->assertText('date is invalid', format_string('Invalid hour value %time has been caught.', ['%time' => $time_value]));

    $date_value = '2012-12-01';
    $time_value = '12:99:00';
    $edit = [
      "{$field_name}[0][value][date]" => $date_value,
      "{$field_name}[0][value][time]" => $time_value,
    ];
    $this->drupalPostForm(NULL, $edit, t('Save'));
    $this->assertText('date is invalid', format_string('Invalid minute value %time has been caught.', ['%time' => $time_value]));

    $date_value = '2012-12-01';
    $time_value = '12:15:99';
    $edit = [
      "{$field_name}[0][value][date]" => $date_value,
      "{$field_name}[0][value][time]" => $time_value,
    ];
    $this->drupalPostForm(NULL, $edit, t('Save'));
    $this->assertText('date is invalid', format_string('Invalid second value %time has been caught.', ['%time' => $time_value]));
  }

  /**
   * Tests that 'Date' field storage setting form is disabled if field has data.
   */
  public function testDateStorageSettings() {
    // Create a test content type.
    $this->drupalCreateContentType(['type' => 'date_content']);

    // Create a field storage with settings to validate.
    $field_name = Unicode::strtolower($this->randomMachineName());
    $field_storage = FieldStorageConfig::create([
      'field_name' => $field_name,
      'entity_type' => 'node',
      'type' => 'datetime',
      'settings' => [
        'datetime_type' => 'date',
      ],
    ]);
    $field_storage->save();
    $field = FieldConfig::create([
      'field_storage' => $field_storage,
      'field_name' => $field_name,
      'bundle' => 'date_content',
    ]);
    $field->save();

    entity_get_form_display('node', 'date_content', 'default')
      ->setComponent($field_name, [
        'type' => 'datetime_default',
      ])
      ->save();
    $edit = [
      'title[0][value]' => $this->randomString(),
      'body[0][value]' => $this->randomString(),
      $field_name . '[0][value][date]' => '2016-04-01',
    ];
    $this->drupalPostForm('node/add/date_content', $edit, t('Save'));
    $this->drupalGet('admin/structure/types/manage/date_content/fields/node.date_content.' . $field_name . '/storage');
    $result = $this->xpath("//*[@id='edit-settings-datetime-type' and contains(@disabled, 'disabled')]");
    $this->assertEqual(count($result), 1, "Changing datetime setting is disabled.");
    $this->assertText('There is data for this field in the database. The field settings can no longer be changed.');
  }

}
