From d22ffffb379ebda21bf792bf18ed9e1324e8902b Mon Sep 17 00:00:00 2001
From: "Douglas B. Rumbaugh" <doug@douglasrumbaugh.com>
Date: Sun, 2 Nov 2025 17:52:13 -0500
Subject: tests: added test to validate the emptying of the free list

---
 tests/liballoc_tests.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

(limited to 'tests/liballoc_tests.c')

diff --git a/tests/liballoc_tests.c b/tests/liballoc_tests.c
index ad45636..6e6b537 100644
--- a/tests/liballoc_tests.c
+++ b/tests/liballoc_tests.c
@@ -68,6 +68,23 @@ START_TEST(basic_release) {
 }
 END_TEST
 
+START_TEST(free_list_emptying) {
+  void *memory = allocate(ALIGNMENT * 3);
+  ck_assert_ptr_nonnull(memory);
+
+  release(memory);
+
+  free_nd *list_head = free_list_head();
+  ck_assert_ptr_nonnull(list_head);
+  ck_assert_ptr_eq(list_head, memory);
+  ck_assert_int_eq(list_head->size, ALIGNMENT*3);
+  ck_assert_ptr_null(list_head->next);
+
+  void *memory2 = allocate(ALIGNMENT *3);
+  ck_assert_ptr_eq(memory, memory2);
+  ck_assert_ptr_null(free_list_head());
+}
+
 START_TEST(release_null) {
   /* releasing NULL should take no action */
   release(NULL);
@@ -186,6 +203,7 @@ Suite *liballoc_suite(void) {
   tcase_add_test(unit, unaligned_allocation);
   tcase_add_test(unit, basic_release);
   tcase_add_test(unit, release_null);
+  tcase_add_test(unit, free_list_emptying);
   tcase_add_test(unit, free_list_reuse);
   tcase_add_test(unit, free_list_coalesce_forward);
   tcase_add_test(unit, free_list_coalesce_backward);
-- 
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