Provide additional information on test failures.

1 files changed, 9 insertions, 6 deletions

diff --git a/include/tests.h b/include/tests.h
index 3adba18..79e1575 100644
--- a/include/tests.h
+++ b/include/tests.h
@@ -19,16 +19,19 @@
                         fail("%s", #predicate);                 \
         } while (0)
 
-#define SYSCALL(call)                                   \
-        do {                                            \
-                if ((call) < 0)                         \
-                        fail("%s, %m", #call);          \
+#define SYSCALL(call)                                                   \
+        do {                                                            \
+                int __test_ret = (call);                                \
+                if (__test_ret < 0)                                     \
+                        fail("%s -> %d, %m", #call, __test_ret);        \
         } while (0)
 
 #define SYSCALL_FAILS(expected, call)                                   \
         do {                                                            \
-                if ((call) == 0 || errno != (expected))                 \
-                        fail("%s, %m (expected: %s)", #call, #expected); \
+                int __test_ret = (call);                                \
+                if (__test_ret == 0 || errno != (expected))             \
+                        fail("%s -> %d, %m (expected: %s)",             \
+                             #call, __test_ret, #expected);             \
         } while (0)