Added some test code.

libkonaclient-test/main.c

@@ -1,7 +1,35 @@
 #include <stdio.h>
+#include "konaimage.h"
+
+void cb_meta_changed(KonaImage* ki) {
+    kona_image_meta *meta;
+    meta = kona_image_get_meta_from_konaimage(ki);
+    printf("%s: META.ID = %d\n", __func__, meta->id);
+}
 
 int main(int argc, char *argv[])
 {
-    printf("Hello world!\n");
+    KonaImage *ki;
+
+    ki = kona_image_new();
+    g_signal_connect(ki, "notify::meta", (GCallback)cb_meta_changed, NULL);
+
+    /* Testing callbacks */
+    GValue val = G_VALUE_INIT;
+    GValue sval = G_VALUE_INIT;
+    kona_image_meta meta;
+    meta.height = 100;
+    meta.width = 200;
+    meta.id = 42;
+    meta.image_url = "http://meow.cat/fullpic.png";
+
+    g_value_init(&sval, G_TYPE_STRING);
+    g_value_set_string(&sval, "/path/to/file.png");
+    g_object_set_property((GObject*) ki, "previewFile", &sval);
+
+    g_value_init(&val, G_TYPE_POINTER);
+    g_value_set_pointer(&val, (gpointer) &meta);
+    g_object_set_property((GObject*) ki, "meta", &val);
+
     return 0;
 }