[libpeas] Check that the plugin is loaded before creating an extension

[Steve Frécinaux <sfre src gnome org>]

commit 7b82c470e7429d9f123feef2d8da1801e3ad4132
Author: Garrett Regier <alias301 gmail com>
Date:   Sun Feb 6 03:13:17 2011 -0800

    Check that the plugin is loaded before creating an extension
    
    This also fixes a test that was disguised as a resident modules issue.

 libpeas/peas-engine.c                     |    1 +
 tests/libpeas-gtk/plugin-manager.c        |    4 +++-
 tests/libpeas/testing/testing-extension.c |    5 +----
 3 files changed, 5 insertions(+), 5 deletions(-)
---
diff --git a/libpeas/peas-engine.c b/libpeas/peas-engine.c
index a1a0530..2e5b8d2 100644
--- a/libpeas/peas-engine.c
+++ b/libpeas/peas-engine.c
@@ -943,6 +943,7 @@ peas_engine_create_extensionv (PeasEngine     *engine,
 
   g_return_val_if_fail (PEAS_IS_ENGINE (engine), NULL);
   g_return_val_if_fail (info != NULL, NULL);
+  g_return_val_if_fail (peas_plugin_info_is_loaded (info), NULL);
 
   loader = get_plugin_loader (engine, info);
   return peas_plugin_loader_create_extension (loader, info, extension_type,
diff --git a/tests/libpeas-gtk/plugin-manager.c b/tests/libpeas-gtk/plugin-manager.c
index df6e38c..f8e6634 100644
--- a/tests/libpeas-gtk/plugin-manager.c
+++ b/tests/libpeas-gtk/plugin-manager.c
@@ -330,10 +330,12 @@ test_gtk_plugin_manager_configure_dialog (TestFixture *fixture)
 
   info = peas_engine_get_plugin_info (fixture->engine, "configurable");
 
+  peas_engine_load_plugin (fixture->engine, info);
+
   testing_get_iter_for_plugin_info (fixture->view, info, &iter);
   gtk_tree_selection_select_iter (fixture->selection, &iter);
 
-  /* Must be first so we the window is added to the window group */
+  /* Must be first so the window is added to the window group */
   gtk_button_clicked (GTK_BUTTON (fixture->configure_button));
 
   window = find_window_by_title (GTK_WINDOW (fixture->window), "Configurable");
diff --git a/tests/libpeas/testing/testing-extension.c b/tests/libpeas/testing/testing-extension.c
index d54b797..354e3db 100644
--- a/tests/libpeas/testing/testing-extension.c
+++ b/tests/libpeas/testing/testing-extension.c
@@ -100,12 +100,9 @@ testing_extension_create_invalid_ (PeasEngine *engine)
       extension = peas_engine_create_extension (engine, info,
                                                 INTROSPECTION_TYPE_CALLABLE,
                                                 NULL);
-      /* Resident Modules */
-      g_object_unref (extension);
       exit (0);
     }
-  /* Resident modules cause this to fail?
-  g_test_trap_assert_failed ();*/
+  g_test_trap_assert_failed ();
 
   g_assert (peas_engine_load_plugin (engine, info));