diff -r 95e42a963520 -r 75ae1dccd101 test/test_list.c
--- a/test/test_list.c	Tue Oct 05 13:04:20 2021 +0200
+++ b/test/test_list.c	Tue Oct 05 16:33:11 2021 +0200
@@ -146,6 +146,82 @@
     CU_ASSERT_PTR_EQUAL(cx_linked_list_last(&third, loc), &third)
 }
 
+void test_linked_list_size(void) {
+    struct node {
+        void *next;
+    };
+    ptrdiff_t loc = offsetof(struct node, next);
+
+    struct node first = {NULL};
+    struct node second = {NULL};
+    struct node third = {NULL};
+
+    CU_ASSERT_PTR_EQUAL(cx_linked_list_size(NULL, loc), 0)
+    CU_ASSERT_PTR_EQUAL(cx_linked_list_size(&first, loc), 1)
+    first.next = &second;
+    CU_ASSERT_PTR_EQUAL(cx_linked_list_size(&first, loc), 2)
+    second.next = &third;
+    CU_ASSERT_PTR_EQUAL(cx_linked_list_size(&first, loc), 3)
+    CU_ASSERT_PTR_EQUAL(cx_linked_list_size(&second, loc), 2)
+}
+
+void test_linked_list_sort(void) {
+    struct node {
+        void *prev;
+        void *next;
+        int data;
+    };
+
+    int expected[] = {
+            14, 30, 151, 163, 227, 300, 315, 317, 363, 398, 417, 424, 438, 446, 508, 555, 605, 713, 716, 759, 761, 880,
+            894, 1034, 1077, 1191, 1231, 1264, 1297, 1409, 1423, 1511, 1544, 1659, 1686, 1707, 1734, 1771, 1874, 1894,
+            1976, 2079, 2124, 2130, 2135, 2266, 2338, 2358, 2430, 2500, 2540, 2542, 2546, 2711, 2733, 2754, 2764, 2797,
+            2888, 2900, 3020, 3053, 3109, 3244, 3275, 3302, 3362, 3363, 3364, 3441, 3515, 3539, 3579, 3655, 3675, 3677,
+            3718, 3724, 3757, 3866, 3896, 3906, 3941, 3984, 3994, 4016, 4085, 4121, 4254, 4319, 4366, 4459, 4514, 4681,
+            4785, 4791, 4801, 4859, 4903, 4973
+    };
+    int scrambled[] = {
+            759, 716, 880, 761, 2358, 2542, 2500, 2540, 2546, 2711, 2430, 1707, 1874, 1771, 1894, 1734, 1976, 2079,
+            2124, 2130, 2135, 2266, 2338, 2733, 2754, 2764, 2797, 3362, 3363, 3364, 3441, 3515, 3539, 3579, 3655, 2888,
+            2900, 3020, 3053, 3109, 3244, 3275, 3302, 438, 446, 508, 555, 605, 713, 14, 30, 151, 163, 227, 300,
+            894, 1034, 1077, 1191, 1231, 1264, 1297, 1409, 1423, 1511, 1544, 1659, 1686, 315, 317, 363, 398, 417, 424,
+            3675, 3677, 3718, 3724, 3757, 3866, 3896, 3906, 3941, 3984, 3994, 4785, 4791, 4801, 4859, 4903, 4973,
+            4016, 4085, 4121, 4254, 4319, 4366, 4459, 4514, 4681
+    };
+
+    struct node *nodes = calloc(100, sizeof(struct node));
+    for (int i = 0; i < 100; i++) {
+        nodes[i].prev = i == 0 ? NULL : &nodes[i - 1];
+        nodes[i].next = i == 99 ? NULL : &nodes[i + 1];
+        nodes[i].data = scrambled[i];
+    }
+
+    struct node *begin = &nodes[0];
+    struct node *end = &nodes[99];
+
+    cx_linked_list_sort((void **) &begin, (void **) &end,
+                        offsetof(struct node, prev),
+                        offsetof(struct node, next),
+                        offsetof(struct node, data),
+                        0, (CxListComparator) cmp_int);
+
+    CU_ASSERT_PTR_NULL(begin->prev)
+    CU_ASSERT_EQUAL(begin->data, expected[0])
+    struct node *check = begin;
+    struct node *check_last = NULL;
+    for (int i = 0 ; i < 100 ; i++) {
+        CU_ASSERT_EQUAL(check->data, expected[i])
+        CU_ASSERT_PTR_EQUAL(check->prev, check_last)
+        if (i < 99) {
+            CU_ASSERT_PTR_NOT_NULL(check->next)
+        }
+        check_last = check;
+        check = check->next;
+    }
+    CU_ASSERT_PTR_NULL(check)
+    CU_ASSERT_EQUAL(end->data, expected[99])
+}
+
 
 void test_hl_linked_list_create(void) {
     cxTestingAllocatorReset();
@@ -494,6 +570,8 @@
     cu_add_test(suite, test_linked_list_at);
     cu_add_test(suite, test_linked_list_add);
     cu_add_test(suite, test_linked_list_last);
+    cu_add_test(suite, test_linked_list_size);
+    cu_add_test(suite, test_linked_list_sort);
 
     suite = CU_add_suite("high level linked list", NULL, NULL);