[dia] [unit test] implement trivial DiaObject::draw() test

[Hans Breuer <hans src gnome org>]

commit adc125e6f6ad2633a510b995f297ab5e8c08c8f7
Author: Hans Breuer <hans breuer org>
Date:   Sun Oct 14 15:26:01 2012 +0200

    [unit test] implement trivial DiaObject::draw() test
    
    This is testing the new path renderer as well as the object's
    draw method. Currently it is a just-doesn't-crash test, but with
    a more reliable path renderer we might introduce checks e.g.
    against the bounding box calculation of the object.
    
    Also added dia_object_set_string() call to
    _test_connectionpoint_consistency() to have some more realistic
    object state to test.

 tests/test-objects.c |   25 +++++++++++++++++++++++++
 1 files changed, 25 insertions(+), 0 deletions(-)
---
diff --git a/tests/test-objects.c b/tests/test-objects.c
index 2a60a39..76220a6 100644
--- a/tests/test-objects.c
+++ b/tests/test-objects.c
@@ -33,6 +33,7 @@
 #include "dialib.h"
 #include "create.h"
 #include "properties.h"
+#include "diapathrenderer.h"
 
 /* allows to select specific objects for testing */
 static gchar *_type_name = NULL;
@@ -361,8 +362,12 @@ _test_connectionpoint_consistency (const DiaObjectType *type)
   Point pos = {0, 0};
   Point center;
   DiaObject *o = type->ops->create (&pos, type->default_user_data, &h1, &h2);
+  ObjectChange *change;
   int i;
 
+  change = dia_object_set_string (o, NULL, "Test me!");
+  _object_change_free (change);
+
   pos = o->position;
   center.x = (o->bounding_box.right + o->bounding_box.left) / 2;
   center.y = (o->bounding_box.bottom + o->bounding_box.top) / 2;
@@ -486,6 +491,22 @@ _test_object_menu (const DiaObjectType *type)
   g_free (o);
 }
 
+static void
+_test_draw (const DiaObjectType *type)
+{
+  Handle *h1 = NULL, *h2 = NULL;
+  Point from = {0, 0};
+  DiaObject *o = type->ops->create (&from, type->default_user_data, &h1, &h2);
+
+  DiaRenderer *renderer = g_object_new (DIA_TYPE_PATH_RENDERER, 0);
+
+  o->ops->draw (o, renderer);
+  /* finally */
+  o->ops->destroy (o);  
+  g_free (o);
+  g_object_unref (renderer);
+}
+
 /*
  * A dictionary interface to all registered object(-types)
  */
@@ -528,6 +549,10 @@ _ot_item (gpointer key,
   g_test_add_data_func (testpath, type, _test_object_menu);
   g_free (testpath);
 
+  testpath = g_strdup_printf ("%s/%s/%s", base, name, "Draw");
+  g_test_add_data_func (testpath, type, _test_draw);
+  g_free (testpath);
+
   ++num_objects;
 }