Issue #1861838 by tim.plunkett, dawehner: Clean up the various Views field rendering methods.

core/modules/field/lib/Drupal/field/Tests/Views/FieldUITest.php

+<?php
+
+/**
+ * @file
+ * Contains \Drupal\field\Tests\Views\FieldUITest.
+ */
+
+namespace Drupal\field\Tests\Views;
+
+/**
+ * Tests the UI of the field field handler.
+ *
+ * @see \Drupal\field\Plugin\views\field\Field
+ */
+class FieldUITest extends FieldTestBase {
+
+  /**
+   * Views used by this test.
+   *
+   * @var array
+   */
+  public static $testViews = array('test_view_fieldapi');
+
+  /**
+   * Modules to enable.
+   *
+   * @var array
+   */
+  public static $modules = array('views_ui');
+
+  public static function getInfo() {
+    return array(
+      'name' => 'Field: Field handler UI',
+      'description' => 'Tests the UI of the field field handler.',
+      'group' => 'Views UI'
+    );
+  }
+
+  /**
+   * Tests basic field handler settings in the UI.
+   */
+  public function testHandlerUI() {
+    $account = $this->drupalCreateUser(array('administer views'));
+    $this->drupalLogin($account);
+
+    $this->setUpFields();
+    $this->setUpInstances();
+
+    $url = "admin/structure/views/nojs/config-item/test_view_fieldapi/default/field/field_name_0";
+    $this->drupalGet($url);
+
+    // Tests the available formatter options.
+    $result = $this->xpath('//select[@id=:id]/option', array(':id' => 'edit-options-type'));
+    $options = array_map(function($item) {
+      return (string) $item->attributes()->value[0];
+    }, $result);
+    // @todo Replace this sort by assertArray once it's in.
+    sort($options, SORT_STRING);
+    $this->assertEqual($options, array('text_default', 'text_plain', 'text_trimmed'), 'The text formatters for a simple text field appear as expected.');
+
+    $this->drupalPost(NULL, array('options[type]' => 'text_trimmed'), t('Apply'));
+
+    $this->drupalGet($url);
+    $this->assertOptionSelected('edit-options-type', 'text_trimmed');
+
+    $random_number = rand(100, 400);
+    $this->drupalPost(NULL, array('options[settings][trim_length]' => $random_number), t('Apply'));
+    $this->drupalGet($url);
+    $this->assertFieldByName('options[settings][trim_length]', $random_number, 'The formatter setting got saved.');
+
+    // Save the view and test whether the settings are saved.
+    $this->drupalPost('admin/structure/views/view/test_view_fieldapi', array(), t('Save'));
+    $view = views_get_view('test_view_fieldapi');
+    $view->initHandlers();
+    $this->assertEqual($view->field['field_name_0']->options['type'], 'text_trimmed');
+    $this->assertEqual($view->field['field_name_0']->options['settings']['trim_length'], $random_number);
+  }
+
+}