diff -u b/field_example/field_example.module b/field_example/field_example.module
--- b/field_example/field_example.module
+++ b/field_example/field_example.module
@@ -82,13 +82,13 @@
 
   // Keeping it simple, only 6-digit hex values accepted.
   if (strlen($value) != 6) {
-    \Drupal::formBuilder()->setError($element, t("Please enter a 6-digit hexadecimal value."));
+    \Drupal::formBuilder()->setError($element, $form_state, t("Please enter a 6-digit hexadecimal value."));
     return;
   }
 
   // Validate that this is a legit hex value.
   if (!ctype_xdigit($value)) {
-    \Drupal::formBuilder()->setError($element, t("Please enter a valid hexadecimal value."));
+    \Drupal::formBuilder()->setError($element, $form_state, t("Please enter a valid hexadecimal value."));
   }
 
   // Add a preceding pound sign.
@@ -111,7 +111,7 @@
     }
     // If they gave us anything that's not hex, reject it.
     if ((strlen($values[$colorfield]) != 2) || !ctype_xdigit($values[$colorfield])) {
-      \Drupal::formBuilder()->setError($element[$colorfield], t("Saturation value must be a 2-digit hexadecimal value between 00 and ff."));
+      \Drupal::formBuilder()->setError($element[$colorfield], $form_state, t("Saturation value must be a 2-digit hexadecimal value between 00 and ff."));
     }
   }
 
diff -u b/field_example/lib/Drupal/field_example/Plugin/Field/FieldFormatter/ColorBackgroudFormatter.php b/field_example/lib/Drupal/field_example/Plugin/Field/FieldFormatter/ColorBackgroudFormatter.php
--- b/field_example/lib/Drupal/field_example/Plugin/Field/FieldFormatter/ColorBackgroudFormatter.php
+++ b/field_example/lib/Drupal/field_example/Plugin/Field/FieldFormatter/ColorBackgroudFormatter.php
@@ -30,7 +30,7 @@
     $elements = array();
 
     foreach ($items as $delta => $item) {
-        $elements[$delta] = array(
+      $elements[$delta] = array(
         '#type' => 'html_tag',
         '#tag' => 'p',
         '#value' => t('The content area color has been changed to @code', array('@code' => $item->value)),
diff -u b/field_example/lib/Drupal/field_example/Plugin/Field/FieldType/RgbItem.php b/field_example/lib/Drupal/field_example/Plugin/Field/FieldType/RgbItem.php
--- b/field_example/lib/Drupal/field_example/Plugin/Field/FieldType/RgbItem.php
+++ b/field_example/lib/Drupal/field_example/Plugin/Field/FieldType/RgbItem.php
@@ -8,6 +8,7 @@
 namespace Drupal\field_example\Plugin\Field\FieldType;
 
 use Drupal\Core\Field\ConfigFieldItemBase;
+use Drupal\Core\Field\FieldDefinitionInterface;
 use Drupal\field\FieldInterface;
 use Drupal\Core\TypedData\DataDefinition;
 
@@ -24,29 +25,10 @@
  * )
  */
 class RgbItem extends ConfigFieldItemBase {
-
-  /**
-   * Definitions of the contained properties.
-   *
-   * @var array
-   */
-  static $propertyDefinitions;
-
   /**
    * {@inheritdoc}
    */
-  public function getPropertyDefinitions() {
-    if (!isset(static::$propertyDefinitions)) {
-      static::$propertyDefinitions['value'] = DataDefinition::create('string')
-        ->setLabel(t('Hex value'));
-    }
-    return static::$propertyDefinitions;
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public static function schema(FieldInterface $field) {
+  public static function schema(FieldDefinitionInterface $field) {
     return array(
       'columns' => array(
         'value' => array(
@@ -67,2 +49,12 @@
   }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function propertyDefinitions(FieldDefinitionInterface $field_definition) {
+    $properties['value'] = DataDefinition::create('string')
+      ->setLabel(t('Hex value'));
+
+    return $properties;
+  }
 }
diff -u b/field_example/lib/Drupal/field_example/Plugin/Field/FieldWidget/ColorPickerWidget.php b/field_example/lib/Drupal/field_example/Plugin/Field/FieldWidget/ColorPickerWidget.php
--- b/field_example/lib/Drupal/field_example/Plugin/Field/FieldWidget/ColorPickerWidget.php
+++ b/field_example/lib/Drupal/field_example/Plugin/Field/FieldWidget/ColorPickerWidget.php
@@ -2,7 +2,7 @@
 
 /**
  * @file
- * Contains \Drupal\field_example\Plugin\field\widget\ColorPickerWidget.
+ * Contains \Drupal\field_example\Plugin\Field\FieldWidget\ColorPickerWidget.
  */
 
 namespace Drupal\field_example\Plugin\Field\FieldWidget;
@@ -27,18 +27,19 @@
    */
   public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, array &$form_state) {
     $element = parent::formElement($items, $delta, $element, $form, $form_state);
-    $element += array(
+    $element['value'] += array(
       '#suffix' => '<div class="field-example-colorpicker"></div>',
       '#attributes' => array('class' => array('edit-field-example-colorpicker')),
       '#attached' => array(
         // Add Farbtastic color picker.
         'library' => array(
-          array('system', 'jquery.farbtastic'),
+          'core/jquery.farbtastic',
         ),
         // Add javascript to trigger the colorpicker.
         'js' => array(drupal_get_path('module', 'field_example') . '/field_example.js'),
       ),
     );
+
     return $element;
   }
 
diff -u b/field_example/lib/Drupal/field_example/Plugin/Field/FieldWidget/Text3Widget.php b/field_example/lib/Drupal/field_example/Plugin/Field/FieldWidget/Text3Widget.php
--- b/field_example/lib/Drupal/field_example/Plugin/Field/FieldWidget/Text3Widget.php
+++ b/field_example/lib/Drupal/field_example/Plugin/Field/FieldWidget/Text3Widget.php
@@ -59,7 +59,7 @@
         $element[$key]['#required'] = TRUE;
       }
     }
-    return $element;
+    return array('value' => $element);
   }
 
 }
diff -u b/field_example/lib/Drupal/field_example/Plugin/Field/FieldWidget/TextWidget.php b/field_example/lib/Drupal/field_example/Plugin/Field/FieldWidget/TextWidget.php
--- b/field_example/lib/Drupal/field_example/Plugin/Field/FieldWidget/TextWidget.php
+++ b/field_example/lib/Drupal/field_example/Plugin/Field/FieldWidget/TextWidget.php
@@ -38,7 +38,7 @@
       '#maxlength' => 7,
       '#element_validate' => array('field_example_text_validate'),
     );
-    return $element;
+    return array('value' => $element);
   }
 
 }
reverted:
--- b/field_example/lib/Drupal/field_example/Tests/FieldExampleTest.php
+++ /dev/null
@@ -1,165 +0,0 @@
-<?php
-
-/**
- * @file
- * Definition of Drupal\field_example\Tests\FieldExampleTest.
- */
-
-namespace Drupal\field_example\Tests;
-
-use Drupal\simpletest\WebTestBase;
-
-class FieldExampleTest extends WebTestBase {
-
-  /**
-   * Modules to enable.
-   *
-   * @var array
-   */
-  public static $modules = array('field_ui', 'field_example');
-
-  public static function getInfo() {
-    return array(
-      'name' => 'Field Example',
-      'description' => 'Create a content type with example_field_rgb fields, create a node, check for correct values.',
-      'group' => 'Examples',
-    );
-  }
-
-  /**
-   * Test basic functionality of the example field.
-   *
-   * - Creates a content type.
-   * - Adds a single-valued field_example_rgb to it.
-   * - Adds a multivalued field_example_rgb to it.
-   * - Creates a node of the new type.
-   * - Populates the single-valued field.
-   * - Populates the multivalued field with two items.
-   * - Tests the result.
-   */
-  function testExampleFieldBasic() {
-    $content_type_machine = strtolower($this->randomName(10));
-    $title = $this->randomName(20);
-
-    // Create and login user.
-    $account = $this->drupalCreateUser(array('administer content types'));
-    $this->drupalLogin($account);
-
-    // Add a content type.
-    $this->drupalGet('admin/structure/types/add');
-    $edit = array(
-      'name' => $content_type_machine,
-      'type' => $content_type_machine,
-    );
-    $this->drupalPostForm(NULL, $edit, t('Save and manage fields'));
-    $this->assertText(t('The content type @name has been added.', array('@name' => $content_type_machine)));
-
-    $single_text_field = strtolower($this->randomName(10));
-    $single_colorpicker_field = strtolower($this->randomName(10));
-    $single_3text_field = strtolower($this->randomName(10));
-    $multivalue_3text_field = strtolower($this->randomName(10));
-
-    // Description of fields to be created;
-    $fields[$single_text_field] = array(
-      'widget' => 'field_example_text',
-      'cardinality' => '1',
-    );
-    $fields[$single_colorpicker_field] = array(
-      'widget' => 'field_example_colorpicker',
-      'cardinality' => 1,
-    );
-    $fields[$single_3text_field] = array(
-      'widget' => 'field_example_3text',
-      'cardinality' => 1,
-    );
-    $fields[$multivalue_3text_field] = array(
-      'widget' => 'field_example_3text',
-      'cardinality' => -1,
-    );
-
-    foreach ($fields as $fieldname => $details) {
-      $this->create_field($fieldname, $details['widget'], $details['cardinality']);
-    }
-
-    menu_router_rebuild();
-    $type_exists = db_query('SELECT 1 FROM {node_type} WHERE type = :type', array(':type' => $content_type_machine))->fetchField();
-    $this->assertTrue($type_exists, 'The new content type has been created in the database.');
-
-    $permission = 'create ' . $content_type_machine . ' content';
-    // Reset the permissions cache.
-    $this->checkPermissions(array($permission), TRUE);
-
-    // Now that we have a new content type, create a user that has privileges
-    // on the content type.
-    $account = $this->drupalCreateUser(array($permission));
-    $this->drupalLogin($account);
-
-    $this->drupalGet('node/add/' . $content_type_machine);
-
-    // Add a node.
-    $edit = array(
-      'title' => $title,
-      'field_' . $single_text_field . '[und][0][rgb]' => '#000001',
-      'field_' . $single_colorpicker_field . '[und][0][rgb]' => '#000002',
-
-      'field_' . $single_3text_field . '[und][0][rgb][r]' => '00',
-      'field_' . $single_3text_field . '[und][0][rgb][g]' => '00',
-      'field_' . $single_3text_field . '[und][0][rgb][b]' => '03',
-
-      'field_' . $multivalue_3text_field . '[und][0][rgb][r]' => '00',
-      'field_' . $multivalue_3text_field . '[und][0][rgb][g]' => '00',
-      'field_' . $multivalue_3text_field . '[und][0][rgb][b]' => '04',
-
-    );
-    // We want to add a 2nd item to the multivalue field, so hit "add another".
-    $this->drupalPostForm(NULL, $edit, t('Add another item'));
-
-    $edit = array(
-      'field_' . $multivalue_3text_field . '[und][1][rgb][r]' => '00',
-      'field_' . $multivalue_3text_field . '[und][1][rgb][g]' => '00',
-      'field_' . $multivalue_3text_field . '[und][1][rgb][b]' => '05',
-    );
-    // Now we can fill in the second item in the multivalue field and save.
-    $this->drupalPostForm(NULL, $edit, t('Save'));
-    $this->assertText(t('@content_type_machine @title has been created', array('@content_type_machine' => $content_type_machine, '@title' => $title)));
-
-
-    $output_strings = $this->xpath("//div[contains(@class,'field-type-field-example-rgb')]/div/div/p/text()");
-
-    $this->assertEqual((string)$output_strings[0], "The color code in this field is #000001");
-    $this->assertEqual((string)$output_strings[1], "The color code in this field is #000002");
-    $this->assertEqual((string)$output_strings[2], "The color code in this field is #000003");
-    $this->assertEqual((string)$output_strings[3], "The color code in this field is #000004");
-    $this->assertEqual((string)$output_strings[4], "The color code in this field is #000005");
-  }
-
-  /**
-   * Utility function to create fields on a content type.
-   * @param $field_name
-   *   Name of the field, like field_something
-   * @param $widget_type
-   *   Widget type, like field_example_3text
-   * @param $cardinality
-   *   Cardinality
-   */
-  protected function create_field($field_name, $widget_type, $cardinality) {
-        // Add a singleton field_example_text field.
-    $edit = array(
-      'fields[_add_new_field][label]' => $field_name,
-      'fields[_add_new_field][field_name]' => $field_name,
-      'fields[_add_new_field][type]' => 'field_example_rgb',
-      //'fields[_add_new_field][widget_type]' => $widget_type,
-    );
-    $this->drupalPostForm(NULL, $edit, t('Save'));
-
-    // There are no settings for this, so just press the button.
-    $this->drupalPostForm(NULL, array(), t('Save field settings'));
-
-    $edit = array('field[cardinality]' => (string)$cardinality);
-
-    // Using all the default settings, so press the button.
-    $this->drupalPostForm(NULL, $edit, t('Save settings'));
-    debug(t('Saved settings for field %field_name with widget %widget_type and cardinality %cardinality', array('%field_name' => $field_name, '%widget_type' => $widget_type, '%cardinality' => $cardinality)));
-    $this->assertText(t('Saved @name configuration.', array('@name' => $field_name)));
-  }
-}
only in patch2:
unchanged:
--- /dev/null
+++ b/field_example/lib/Drupal/field_example/Tests/FieldWebTestBase.php
@@ -0,0 +1,123 @@
+<?php
+
+/**
+ * @file
+ * Definition of Drupal\field_example\Tests\FieldWebTestBase.
+ */
+
+namespace Drupal\field_example\Tests;
+
+use Drupal\Core\Session\AccountInterface;
+use Drupal\simpletest\WebTestBase;
+
+class FieldWebTestBase extends WebTestBase {
+  /**
+   * @var string
+   */
+  protected $contentTypeName;
+
+  /**
+   * @var AccountInterface
+   */
+  protected $administratorAccount;
+
+  /**
+   * @var AccountInterface
+   */
+  protected $authorAccount;
+  /**
+   * @var string
+   */
+  protected $fieldName;
+  /**
+   * Modules to enable.
+   *
+   * @var array
+   */
+  public static $modules = array('node', 'field_ui', 'field_example');
+
+  /**
+   * {@inheritdoc}
+   *
+   * Once installed, a content type with the desired field is created
+   */
+  protected function setUp() {
+    // Install Drupal.
+    parent::setUp();
+
+    // Create and login a user that creates the content type.
+    $permissions = array(
+      'administer content types',
+      'administer node fields',
+      'administer node form display',
+    );
+    $this->administratorAccount = $this->drupalCreateUser($permissions);
+    parent::drupalLogin($this->administratorAccount);
+
+    // Prepare a new content type where the field will be added.
+    $this->contentTypeName = strtolower($this->randomName(10));
+    $this->drupalGet('admin/structure/types/add');
+    $edit = array(
+      'name' => $this->contentTypeName,
+      'type' => $this->contentTypeName,
+    );
+    $this->drupalPostForm(NULL, $edit, t('Save and manage fields'));
+    $this->assertText(t('The content type @name has been added.', array('@name' => $this->contentTypeName)));
+
+    // Reset the permission cache.
+    $create_permission = 'create ' . $this->contentTypeName . ' content';
+    $this->checkPermissions(array($create_permission), TRUE);
+
+    // Now that we have a new content type, create a user that has privileges
+    // on the content type.
+    $this->authorAccount = $this->drupalCreateUser(array($create_permission));
+  }
+
+  /**
+   * Create a field on the content type created during setUp().
+   *
+   * @param string $type
+   *   The storage field type to create
+   * @param string $widget_type
+   *   The widget to use when editing this field
+   * @param int|string $cardinality
+   *   Cardinality of the field.
+   *
+   * @return string
+   *   Name of the field, like field_something
+   */
+  protected function createField($type = 'field_example_rgb', $widget_type = 'field_example_text', $cardinality = 'number') {
+    $this->drupalGet('admin/structure/types/manage/' . $this->contentTypeName . '/fields');
+
+    $field_name = strtolower($this->randomName(10));
+    // Add a singleton field_example_text field.
+    $edit = array(
+      'fields[_add_new_field][label]' => $field_name,
+      'fields[_add_new_field][field_name]' => $field_name,
+      'fields[_add_new_field][type]' => $type,
+    );
+    $this->drupalPostForm(NULL, $edit, t('Save'));
+
+    $edit = array('field[cardinality]' => (string) $cardinality);
+
+    // Using all the default settings, so press the button.
+    $this->drupalPostForm(NULL, $edit, t('Save field settings'));
+    debug(t('Saved settings for field %field_name with widget %widget_type and cardinality %cardinality',
+        array(
+          '%field_name' => $field_name,
+          '%widget_type' => $widget_type,
+          '%cardinality' => $cardinality,
+        )
+      ));
+    $this->assertText(t('Updated field @name field settings.', array('@name' => $field_name)));
+
+    // Set the widget type for the newly created field.
+    $this->drupalGet('admin/structure/types/manage/' . $this->contentTypeName . '/form-display');
+    $edit = array(
+      'fields[field_' . $field_name . '][type]' => $widget_type,
+    );
+    $this->drupalPostForm(NULL, $edit, t('Save'));
+
+    return $field_name;
+  }
+}
only in patch2:
unchanged:
--- /dev/null
+++ b/field_example/lib/Drupal/field_example/Tests/Text3WidgetTest.php
@@ -0,0 +1,108 @@
+<?php
+
+/**
+ * @file
+ * Definition of Drupal\field_example\Tests\Text3WidgetTest.
+ */
+
+namespace Drupal\field_example\Tests;
+
+class Text3WidgetTest extends FieldWebTestBase {
+  /**
+   * {@inheritdoc}
+   */
+  public static function getInfo() {
+    return array(
+      'name' => 'Field Example with Text3Widget',
+      'description' => 'Create a content type with a example_field_rgb field, configure it with the field_example_text-widget, create a node and check for correct values.',
+      'group' => 'Examples',
+    );
+  }
+
+  /**
+   * Test basic functionality of the example field.
+   *
+   * - Creates a content type.
+   * - Adds a single-valued field_example_rgb to it.
+   * - Adds a multivalued field_example_rgb to it.
+   * - Creates a node of the new type.
+   * - Populates the single-valued field.
+   * - Populates the multivalued field with two items.
+   * - Tests the result.
+   */
+  public function testSingleValueField() {
+    // Add a single field as administrator user.
+    $this->drupalLogin($this->administratorAccount);
+    $this->fieldName = $this->createField('field_example_rgb', 'field_example_3text', 'number');
+    // Post-condition: Content type now has the desired field.
+
+    // Switch to the author user to create content with this type and field.
+    $this->drupalLogin($this->authorAccount);
+    $this->drupalGet('node/add/' . $this->contentTypeName);
+
+    // Fill the create form.
+    $title = $this->randomName(20);
+    $edit = array(
+      'title[0][value]' => $title,
+      'field_' . $this->fieldName . '[0][value][r]' => '00',
+      'field_' . $this->fieldName . '[0][value][g]' => '0a',
+      'field_' . $this->fieldName . '[0][value][b]' => '01',
+    );
+
+    // Create the content.
+    $this->drupalPostForm(NULL, $edit, t('Save'));
+    $this->assertText(t('@type @title has been created', array('@type' => $this->contentTypeName, '@title' => $title)));
+
+    // Verify the value is shown when viewing this node.
+    $output_strings = $this->xpath("//div[contains(@class,'field-type-field-example-rgb')]/div/div/p/text()");
+    $this->assertEqual((string) $output_strings[0], "The color code in this field is #000a01");
+  }
+
+  /**
+   * Test basic functionality of the example field.
+   *
+   * - Creates a content type.
+   * - Adds a single-valued field_example_rgb to it.
+   * - Adds a multivalued field_example_rgb to it.
+   * - Creates a node of the new type.
+   * - Populates the single-valued field.
+   * - Populates the multivalued field with two items.
+   * - Tests the result.
+   */
+  public function testMultiValueField() {
+    // Add a single field as administrator user.
+    $this->drupalLogin($this->administratorAccount);
+    $this->fieldName = $this->createField('field_example_rgb', 'field_example_3text', '-1');
+    // Post-condition: Content type now has the desired field.
+
+    // Switch to the author user to create content with this type and field.
+    $this->drupalLogin($this->authorAccount);
+    $this->drupalGet('node/add/' . $this->contentTypeName);
+
+    // Fill the create form.
+    $title = $this->randomName(20);
+    $edit = array(
+      'title[0][value]' => $title,
+      'field_' . $this->fieldName . '[0][value][r]' => '00',
+      'field_' . $this->fieldName . '[0][value][g]' => 'ff',
+      'field_' . $this->fieldName . '[0][value][b]' => '00',
+    );
+
+    // Add a 2nd item to the multivalue field, so hit "add another".
+    $this->drupalPostForm(NULL, $edit, t('Add another item'));
+    $edit = array(
+      'field_' . $this->fieldName . '[1][value][r]' => 'ff',
+      'field_' . $this->fieldName . '[1][value][g]' => 'ff',
+      'field_' . $this->fieldName . '[1][value][b]' => 'ff',
+    );
+
+    // Create the content.
+    $this->drupalPostForm(NULL, $edit, t('Save'));
+    $this->assertText(t('@type @title has been created', array('@type' => $this->contentTypeName, '@title' => $title)));
+
+    // Verify the values are shown when viewing this node.
+    $output_strings = $this->xpath("//div[contains(@class,'field-type-field-example-rgb')]/div/div/p/text()");
+    $this->assertEqual((string) $output_strings[0], "The color code in this field is #00ff00");
+    $this->assertEqual((string) $output_strings[1], "The color code in this field is #ffffff");
+  }
+}
only in patch2:
unchanged:
--- /dev/null
+++ b/field_example/lib/Drupal/field_example/Tests/TextWidgetTest.php
@@ -0,0 +1,101 @@
+<?php
+
+/**
+ * @file
+ * Definition of Drupal\field_example\Tests\TextWidgetTest.
+ */
+
+namespace Drupal\field_example\Tests;
+
+class TextWidgetTest extends FieldWebTestBase {
+  /**
+   * {@inheritdoc}
+   */
+  public static function getInfo() {
+    return array(
+      'name' => 'Field Example with Text Widget',
+      'description' => 'Create a content type with a example_field_rgb field, configure it with the field_example_text-widget, create a node and check for correct values.',
+      'group' => 'Examples',
+    );
+  }
+
+  /**
+   * Test basic functionality of the example field.
+   *
+   * - Creates a content type.
+   * - Adds a single-valued field_example_rgb to it.
+   * - Adds a multivalued field_example_rgb to it.
+   * - Creates a node of the new type.
+   * - Populates the single-valued field.
+   * - Populates the multivalued field with two items.
+   * - Tests the result.
+   */
+  public function testSingleValueField() {
+    // Add a single field as administrator user.
+    $this->drupalLogin($this->administratorAccount);
+    $this->fieldName = $this->createField('field_example_rgb', 'field_example_text', 'number');
+
+    // Now that we have a content type with the desired field, switch to the author user to create content with it.
+    $this->drupalLogin($this->authorAccount);
+    $this->drupalGet('node/add/' . $this->contentTypeName);
+
+    // Add a node.
+    $title = $this->randomName(20);
+    $edit = array(
+      'title[0][value]' => $title,
+      'field_' . $this->fieldName . '[0][value]' => '#000001',
+    );
+
+    // Create the content.
+    $this->drupalPostForm(NULL, $edit, t('Save'));
+    $this->assertText(t('@type @title has been created', array('@type' => $this->contentTypeName, '@title' => $title)));
+
+    // Verify the value is shown when viewing this node.
+    $output_strings = $this->xpath("//div[contains(@class,'field-type-field-example-rgb')]/div/div/p/text()");
+    $this->assertEqual((string) $output_strings[0], "The color code in this field is #000001");
+  }
+
+  /**
+   * Test basic functionality of the example field.
+   *
+   * - Creates a content type.
+   * - Adds a single-valued field_example_rgb to it.
+   * - Adds a multivalued field_example_rgb to it.
+   * - Creates a node of the new type.
+   * - Populates the single-valued field.
+   * - Populates the multivalued field with two items.
+   * - Tests the result.
+   */
+  public function testMultiValueField() {
+    // Add a single field as administrator user.
+    $this->drupalLogin($this->administratorAccount);
+    $this->fieldName = $this->createField('field_example_rgb', 'field_example_text', '-1');
+
+    // Now that we have a content type with the desired field, switch to the author user to create content with it.
+    $this->drupalLogin($this->authorAccount);
+    $this->drupalGet('node/add/' . $this->contentTypeName);
+
+    // Add a node.
+    $title = $this->randomName(20);
+    $edit = array(
+      'title[0][value]' => $title,
+      'field_' . $this->fieldName . '[0][value]' => '#00ff00',
+    );
+
+    // We want to add a 2nd item to the multivalue field, so hit "add another".
+    $this->drupalPostForm(NULL, $edit, t('Add another item'));
+
+    $edit = array(
+      'field_' . $this->fieldName . '[1][value]' => '#ffffff',
+    );
+
+    // Now we can fill in the second item in the multivalue field and save.
+    $this->drupalPostForm(NULL, $edit, t('Save'));
+    $this->assertText(t('@type @title has been created', array('@type' => $this->contentTypeName, '@title' => $title)));
+
+    // Verify the value is shown when viewing this node.
+    $output_strings = $this->xpath("//div[contains(@class,'field-type-field-example-rgb')]/div/div/p/text()");
+    $this->assertEqual((string) $output_strings[0], "The color code in this field is #00ff00");
+    $this->assertEqual((string) $output_strings[1], "The color code in this field is #ffffff");
+  }
+}