diff --git a/core/modules/simpletest/src/AssertContentTrait.php b/core/modules/simpletest/src/AssertContentTrait.php
index 00898be..87e6c66 100644
--- a/core/modules/simpletest/src/AssertContentTrait.php
+++ b/core/modules/simpletest/src/AssertContentTrait.php
@@ -1173,6 +1173,44 @@ protected function assertNoFieldById($id, $value = '', $message = '', $group = '
   }
 
   /**
+   * Asserts that a field in the current page is enabled.
+   *
+   * @param string $name
+   *   Name of field to assert.
+   * @param string $message
+   *   (optional) A message to display with the assertion. Do not translate
+   *   messages: use \Drupal\Component\Utility\SafeMarkup::format() to embed
+   *   variables in the message text, not t(). If left blank, a default message
+   *   will be displayed.
+   *
+   * @return bool
+   *   TRUE on pass, FALSE on fail.
+   */
+  protected function assertFieldEnabled($name, $message = '') {
+    $elements = $this->xpath($this->constructFieldXpath('name', $name));
+    return $this->assertTrue(isset($elements[0]) && empty($elements[0]['disabled']), $message ? $message : t('Field %name is enabled.', array('%name' => $name)), t('Browser'));
+  }
+
+  /**
+   * Asserts that a field in the current page is disabled.
+   *
+   * @param string $name
+   *   Name of field to assert.
+   * @param string $message
+   *   (optional) A message to display with the assertion. Do not translate
+   *   messages: use \Drupal\Component\Utility\SafeMarkup::format() to embed
+   *   variables in the message text, not t(). If left blank, a default message
+   *   will be displayed.
+   *
+   * @return bool
+   *   TRUE on pass, FALSE on fail.
+   */
+  protected function assertFieldDisabled($name, $message = '') {
+    $elements = $this->xpath($this->constructFieldXpath('name', $name));
+    return $this->assertTrue(isset($elements[0]) && !empty($elements[0]['disabled']), $message ? $message : t('Field %name is disabled.', array('%name' => $name)), t('Browser'));
+  }
+
+  /**
    * Asserts that a checkbox field in the current page is checked.
    *
    * @param string $id