1 files changed, 63 insertions, 0 deletions
diff --git a/tests/test17.c b/tests/test17.c
new file mode 100644
index 000000000..cb6300128
--- /dev/null
+++ b/tests/test17.c
@@ -0,0 +1,63 @@
+#include "uthash.h"
+#include <stdlib.h>   /* malloc */
+#include <stdio.h>    /* printf */
+
+typedef struct example_user_t {
+    int id;
+    int cookie;
+    UT_hash_handle hh;
+} example_user_t;
+
+static int rev(void *_a, void *_b)
+{
+    example_user_t *a = (example_user_t*)_a;
+    example_user_t *b = (example_user_t*)_b;
+    printf("called for a:%d, b:%d\n",a->id, b->id);
+    return (a->id - b->id);
+}
+
+int main()
+{
+    int i;
+    example_user_t *user, *users=NULL;
+
+    /* create elements */
+    for(i=9; i>=0; i--) {
+        user = (example_user_t*)malloc(sizeof(example_user_t));
+        if (user == NULL) {
+            exit(-1);
+        }
+        user->id = i;
+        user->cookie = i*i;
+        HASH_ADD_INT(users,id,user);
+    }
+
+    for(user=users; user != NULL; user=(example_user_t*)user->hh.next) {
+        printf("user %d, cookie %d\n", user->id, user->cookie);
+    }
+    printf("sorting\n");
+    HASH_SORT(users,rev);
+    for(user=users; user != NULL; user=(example_user_t*)user->hh.next) {
+        printf("user %d, cookie %d\n", user->id, user->cookie);
+    }
+
+    printf("adding 10-20\n");
+    for(i=20; i>=10; i--) {
+        user = (example_user_t*)malloc(sizeof(example_user_t));
+        if (user == NULL) {
+            exit(-1);
+        }
+        user->id = i;
+        user->cookie = i*i;
+        HASH_ADD_INT(users,id,user);
+    }
+    for(user=users; user != NULL; user=(example_user_t*)user->hh.next) {
+        printf("user %d, cookie %d\n", user->id, user->cookie);
+    }
+    printf("sorting\n");
+    HASH_SORT(users,rev);
+    for(user=users; user != NULL; user=(example_user_t*)user->hh.next) {
+        printf("user %d, cookie %d\n", user->id, user->cookie);
+    }
+    return 0;
+}