diff --git modules/simpletest/tests/ajax.test modules/simpletest/tests/ajax.test
index c70e7e4..d5a4fc8 100644
--- modules/simpletest/tests/ajax.test
+++ modules/simpletest/tests/ajax.test
@@ -3,13 +3,90 @@
 
 class AJAXTestCase extends DrupalWebTestCase {
   function setUp() {
-    parent::setUp('ajax_test');
+    parent::setUp('ajax_test', 'ajax_forms_test');
   }
 
   function drupalGetAJAX($path, $query = array()) {
     $this->drupalGet($path, array('query' => $query));
     return json_decode($this->content, TRUE);
   }
+
+
+  /**
+   * Execute a POST request on an AJAX path (normally system/ajax).
+   * It will be done as usual POST request with SimpleBrowser.
+   *
+   * @param $path
+   *   Location of the post form. A Drupal path.
+   * @param  $edit
+   *   Field data in an associative array. Changes the current input fields
+   *   (where possible) to the values indicated. A checkbox can be set to
+   *   TRUE to be checked and FALSE to be unchecked. Note that when a form
+   *   contains file upload fields, other fields cannot start with the '@'
+   *   character.
+   *
+   *   Multiple select fields can be set using name[] and setting each of the
+   *   possible values. Example:
+   *   $edit = array();
+   *   $edit['name[]'] = array('value1', 'value2');
+   * @param $triggering_element
+   *   Name of the element that triggered the AJAX operation.
+   * @param $ajax_path
+   *   Path to which to post the AJAX request.
+   * @param $options
+   *   Options to be forwarded to url().
+   * @param $headers
+   *   An array containing additional HTTP request headers, each formatted as
+   *   "name: value".
+   */
+  protected function AJAXPost($path, $edit, $triggering_element, $ajax_path = 'system/ajax', array $options = array(), array $headers = array()) {
+    if (isset($path)) {
+      $html = $this->drupalGet($path, $options);
+    }
+
+    if ($this->parse()) {
+      $edit_save = $edit;
+      // Let's iterate over all the forms.
+      $forms = $this->xpath('//form');
+      foreach ($forms as $form) {
+        // We try to set the fields of this form as specified in $edit.
+        $edit = $edit_save;
+        $post = array();
+        $upload = array();
+        $this->handleForm($post, $edit, $upload, NULL, $form);
+        $action = $this->getAbsoluteUrl($ajax_path);
+        $post_array = $post;
+        foreach ($post as $key => $value) {
+          // Encode according to application/x-www-form-urlencoded
+          // Both names and values needs to be urlencoded, according to
+          // http://www.w3.org/TR/html4/interact/forms.html#h-17.13.4.1
+          $post[$key] = urlencode($key) . '=' . urlencode($value);
+        }
+        $post['ajax_triggering_element'] = 'ajax_triggering_element=' . urlencode($triggering_element);
+        $post = implode('&', $post);
+        // debug($post, "POST data");
+        $out = $this->curlExec(array(CURLOPT_URL => $action, CURLOPT_POST => TRUE, CURLOPT_POSTFIELDS => $post, CURLOPT_HTTPHEADER => $headers));
+        // Ensure that any changes to variables in the other thread are picked up.
+        $this->refreshVariables();
+
+        // Replace original page output with new output from redirected page(s).
+        if (($new = $this->checkForMetaRefresh())) {
+          $out = $new;
+        }
+        $this->verbose('POST request to: ' . $ajax_path .
+                         '<hr />Ending URL: ' . $this->getUrl() .
+                         '<hr />Fields: ' . highlight_string('<?php ' . var_export($post_array, TRUE), TRUE) .
+                         '<hr />' . $out);
+        return json_decode($out, TRUE);
+
+      }
+      // We have not found a form which contained all fields of $edit.
+      foreach ($edit as $name => $value) {
+        $this->fail(t('Failed to set field @name to @value', array('@name' => $name, '@value' => $value)));
+      }
+    }
+  }
+
 }
 
 /**
@@ -78,3 +155,52 @@ class AJAXCommandsTestCase extends AJAXTestCase {
   }
 }
 
+/**
+ * Test that $form_state['values'] is properly delivered to $ajax['callback'].
+ * @author rfay
+ *
+ */
+class AJAXFormValuesTestCase extends AJAXTestCase {
+
+  public static function getInfo() {
+    return array(
+      'name' => 'AJAX Form Values in command',
+      'description' => 'Creates a form, then POSTS to system/ajax to change the form via pseudo-ajax.',
+      'group' => 'AJAX',
+    );
+  }
+
+  function setUp() {
+    parent::setUp('ajax_forms_test');
+  }
+
+  /**
+   * Create a simple form with a select, then POST a change to it.
+   */
+  function testSimpleAJAXFormValue() {
+    $form_path = 'ajax_forms_test_get_form';
+    $web_user = $this->drupalCreateUser(array('access content'));
+    $this->drupalLogin($web_user);
+    // $page_data = $this->drupalGet($form_path);
+
+    $edit = array();
+
+    $selects_to_test = array('red', 'green', 'blue');
+    foreach($selects_to_test as $item) {
+      $edit['select'] = $item;
+      $commands = $this->AJAXPost($form_path, $edit, 'select');
+      $data_command = $commands[2];
+      $this->assertTrue($data_command['value'] == $edit['select'], "Expected form_state['values'] == '{$edit['select']}') and received '{$data_command['value']}'");
+    }
+
+    $values_to_test = array(FALSE,TRUE);
+    foreach($values_to_test as $item) {
+      $edit['checkbox'] = $item;
+      $commands = $this->AJAXPost($form_path, $edit, 'checkbox');
+      $data_command = $commands[2];
+      $value_expected = (int)$item;
+      $value_received = (int)$data_command['value'];
+      $this->assertTrue($value_received == $value_expected, "Expected form_state['values'] == '$value_expected') and received '{$value_received}'");
+    }
+  }
+}
diff --git modules/simpletest/tests/ajax_forms_test.info modules/simpletest/tests/ajax_forms_test.info
new file mode 100644
index 0000000..367d088
--- /dev/null
+++ modules/simpletest/tests/ajax_forms_test.info
@@ -0,0 +1,8 @@
+; $Id: database_test.info,v 1.2 2008/10/09 22:51:40 webchick Exp $
+name = "AJAX form test mock module"
+description = "Test for AJAX form calls."
+core = 7.x
+package = Testing
+files[] = ajax_forms_test.module
+version = VERSION
+;hidden = TRUE
diff --git modules/simpletest/tests/ajax_forms_test.module modules/simpletest/tests/ajax_forms_test.module
new file mode 100644
index 0000000..7bcdc99
--- /dev/null
+++ modules/simpletest/tests/ajax_forms_test.module
@@ -0,0 +1,65 @@
+<?php
+// $Id: $
+
+/**
+ * @file
+ *   Simpletest mock module for AJAX forms testing.
+ */
+
+function ajax_forms_test_menu() {
+  $items = array();
+  $items['ajax_forms_test_get_form'] = array(
+    'title' => 'AJAX Forms Simple Form Test',
+    'page callback' => 'ajax_forms_test_get_form',
+    'access callback' => TRUE,
+  );
+  return $items;
+}
+
+function ajax_forms_test_get_form() {
+  $form = drupal_get_form('ajax_forms_test_simple_form');
+
+  $output[] = array('#markup' => "#form_id={$form['#form_id']} and #build_id={$form['#build_id']}.");
+  $output[] = $form;
+  return $output;
+
+}
+function ajax_forms_test_simple_form($form, &$form_state) {
+  $form = array();
+  $form['select'] = array(
+    '#type' => 'select',
+    '#options' => array('red' => 'red', 'green' => 'green', 'blue' => 'blue'),
+    '#ajax' => array(
+      'callback' => 'ajax_forms_test_simple_form_select_callback',
+    ),
+    '#suffix' => "<div id='ajax_selected_color'>No color yet selected</div>",
+  );
+
+  $form['checkbox'] = array(
+    '#type' => 'checkbox',
+    '#title' => 'Test checkbox',
+    '#ajax' => array(
+       'callback' => 'ajax_forms_test_simple_form_checkbox_callback',
+    ),
+    '#suffix' => '<div id="ajax_checkbox_value">No action yet</div>',
+  );
+  $form['submit'] = array(
+    '#type' => 'submit',
+    '#value' => 'submit',
+  );
+  return $form;
+}
+
+function ajax_forms_test_simple_form_select_callback($form, $form_state) {
+  $commands = array();
+  $commands[] = ajax_command_html('#ajax_selected_color', $form_state['values']['select']);
+  $commands[] = ajax_command_data('#ajax_selected_color', 'form_state_value_select', $form_state['values']['select']);
+  return array('#type' => 'ajax_commands', '#ajax_commands' => $commands);
+}
+
+function ajax_forms_test_simple_form_checkbox_callback($form, $form_state) {
+  $commands = array();
+  $commands[] = ajax_command_html('#ajax_checkbox_value', (int)$form_state['values']['checkbox']);
+  $commands[] = ajax_command_data('#ajax_checkbox_value', 'form_state_value_select', (int)$form_state['values']['checkbox']);
+  return array('#type' => 'ajax_commands', '#ajax_commands' => $commands);
+}
\ No newline at end of file
