1 files changed, 56 insertions, 0 deletions
diff --git a/tests/test37.c b/tests/test37.c
new file mode 100644
index 000000000..ea5209fd8
--- /dev/null
+++ b/tests/test37.c
@@ -0,0 +1,56 @@
+#include "uthash.h"
+#include <stdlib.h>   /* malloc */
+#include <stdio.h>    /* printf */
+
+typedef struct {
+    int id;
+    UT_hash_handle hh;
+    UT_hash_handle ah;
+} example_user_t;
+
+#define EVENS(x) ((((example_user_t*)(x))->id % 2) == 0)
+
+static int idcmp(void *_a, void *_b)
+{
+    example_user_t *a = (example_user_t*)_a;
+    example_user_t *b = (example_user_t*)_b;
+    return (a->id - b->id);
+}
+
+int main()
+{
+    int i;
+    example_user_t *user, *users=NULL, *ausers=NULL;
+
+    /* create elements */
+    for(i=0; i<10; i++) {
+        user = (example_user_t*)malloc(sizeof(example_user_t));
+        if (user == NULL) {
+            exit(-1);
+        }
+        user->id = i;
+        HASH_ADD_INT(users,id,user);
+    }
+
+    for(user=users; user!=NULL; user=(example_user_t*)(user->hh.next)) {
+        printf("user %d\n", user->id);
+    }
+    printf("users count: %u\n", HASH_CNT(hh,users));
+
+    /* now select some users into ausers */
+    HASH_SELECT(ah,ausers,hh,users,EVENS);
+    HASH_SRT(ah,ausers,idcmp);
+
+    for(user=ausers; user!=NULL; user=(example_user_t*)(user->ah.next)) {
+        printf("auser %d\n", user->id);
+    }
+    printf("ausers count: %u\n", HASH_CNT(ah,ausers));
+    HASH_CLEAR(ah,ausers);
+    printf("cleared ausers.\n");
+    printf("ausers count: %u\n", HASH_CNT(ah,ausers));
+    for(user=ausers; user!=NULL; user=(example_user_t*)(user->ah.next)) {
+        printf("auser %d\n", user->id);
+    }
+    printf("users count: %u\n", HASH_CNT(hh,users));
+    return 0;
+}