修复bug，这就是单元测试的意义吧！

src/heap.c

@@ -283,5 +283,5 @@ void heap_free(heap_t* heap)
         (*heap)->destory(*heap);
         free(*heap);
     }
-    heap = NULL;
+    *heap = NULL;
 }

src/list.c

@@ -227,5 +227,5 @@ void list_free(list_t* list)
         (*list)->destory(*list);
         free(*list);
     }
-    list = NULL;
+    *list = NULL;
 }

src/queue.c

@@ -347,5 +347,5 @@ void queue_free(queue_t* queue)
         (*queue)->destory(*queue);
         free(*queue);
     }
-    queue = NULL;
+    *queue = NULL;
 }

src/tree.c

@@ -1539,5 +1539,5 @@ void tree_free(tree_t* tree)
         (*tree)->destory(*tree);
         free(*tree);
     }
-    tree = NULL;
+    *tree = NULL;
 }

test/demo_queue.c

@@ -0,0 +1,27 @@
+/**
+ * @file demo_queue.c
+ * @author wenjf (Orig5826@163.com)
+ * @brief 
+ * @version 0.1
+ * @date 2024-08-28
+ * 
+ * @copyright Copyright (c) 2024
+ * 
+ */
+#include "test.h"
+
+static void test_queue_destory(void)
+{
+    queue_t queue = NULL;
+    queue = queue_new();
+    TEST_ASSERT_TRUE(queue_init(queue, sizeof(int)));
+    TEST_ASSERT_NOT_NULL(queue);
+
+    queue_free(&queue);
+    TEST_ASSERT_NULL(queue);
+}
+
+void test_queue(void)
+{
+    RUN_TEST(test_queue_destory);
+}

test/test.c

@@ -74,6 +74,7 @@ int main(int argc, char const *argv[])
     UNITY_BEGIN();
 
     test_stack();
+    test_queue();
     
     UNITY_END();
     return 0;