Index: themes/tests/test_theme/template.php
===================================================================
RCS file: /cvs/drupal/drupal/themes/tests/test_theme/template.php,v
retrieving revision 1.2
diff -u -p -F '^f' -r1.2 template.php
--- themes/tests/test_theme/template.php	22 Aug 2010 12:46:21 -0000	1.2
+++ themes/tests/test_theme/template.php	15 Nov 2010 09:36:14 -0000
@@ -20,3 +20,24 @@ function test_theme_breadcrumb__suggesti
 function test_theme_theme_test_alter_alter(&$data) {
   $data = 'test_theme_theme_test_alter_alter was invoked';
 }
+
+
+/**
+ * Tests that theme hook suggestions provided by a module in a preprocess
+ * function are available to the theme.  These suggestions are created in
+ * template_preprocess_node().
+ */
+function test_theme_preprocess_node(&$variables) {
+  // You should see node__TYPE, node__ID.
+  print_r($variables['theme_hook_suggestions']);
+}
+
+/**
+ * Tests that theme hook suggestions provided by a module in a render element
+ * are available to the theme. The exposed_filters__user suggestion is created
+ * in user_filter_form().
+ */
+function test_theme_preprocess_exposed_filters(&$variables) {
+  // You should see exposed_filters__user.  You get nothing.
+  print_r($variables['theme_hook_suggestions']);
+}