Add AM_CONTAINER_OF() unit test

Author: adel-mamin

CHANGELOG.md

@@ -17,6 +17,7 @@ and this project adheres to [0-based versioning](https://0ver.org/).
 - [Cigarette Smokers Problem](https://en.wikipedia.org/wiki/Cigarette_smokers_problem) solution.
 - New `AM_ATOMIC_FETCH_ADD()` macro for atomic addition.
 - Clarification examples to FSM and HSW return macros.
+- `AM_CONTAINER_OF()` macro unit test.x
 
 ### Changed
 

libs/common/test.c

@@ -83,8 +83,19 @@ static void test_align(void) {
     }
 }
 
+static void test_container_of(void) {
+    struct foo {
+        int a;
+        int b;
+    };
+    struct foo foo = {.a = 1, .b = 2};
+    int *bp = &foo.b;
+    AM_ASSERT(1 == AM_CONTAINER_OF(bp, struct foo, b)->a);
+}
+
 int main(void) {
     test_align();
+    test_container_of();
 
     return 0;
 }