Fix Error: usrsocktest_basic_connect.c:112:7: error: variable 'ret' set but not used

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
diff --git a/examples/usrsocktest/usrsocktest_basic_connect.c b/examples/usrsocktest/usrsocktest_basic_connect.c
index 215cdee..0f63985 100644
--- a/examples/usrsocktest/usrsocktest_basic_connect.c
+++ b/examples/usrsocktest/usrsocktest_basic_connect.c
@@ -114,13 +114,13 @@
   if (sd >= 0)
     {
       ret = close(sd);
-      assert(ret >= 0);
+      TEST_ASSERT_TRUE(ret >= 0);
     }
 
   if (started)
     {
       ret = usrsocktest_daemon_stop();
-      assert(ret == OK);
+      TEST_ASSERT_EQUAL(OK, ret);
     }
 }