[LTP] [PATCH] test_macros: TST_EXP_EXPR() add auto stringification

[Cyril Hrubis]

This unifies the behavior with the rest of the TST_EXP_*() macros that
auto-stringify their parameters in case that no format string is
supplied.

It's actually useful in cases where there is clear from the variables
what has been asserted such as:

static void run(void)
{
	siginfo_t infop;

	...

	TST_EXP_EXPR(infop.si_pid == child_pid);

	...
}

Signed-off-by: Cyril Hrubis <chrubis@suse.cz>
---
 include/tst_test_macros.h | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/include/tst_test_macros.h b/include/tst_test_macros.h
index 8893dbf0e..3b3b1b17e 100644
--- a/include/tst_test_macros.h
+++ b/include/tst_test_macros.h
@@ -211,7 +211,10 @@ extern void *TST_RET_PTR;
 #define TST_EXP_FAIL2_SILENT(SCALL, ERRNO, ...) \
 	TST_EXP_FAIL_SILENT_(TST_RET >= 0, SCALL, #SCALL, ERRNO, ##__VA_ARGS__)
 
-#define TST_EXP_EXPR(EXPR, FMT, ...)						\
-	tst_res_(__FILE__, __LINE__, (EXPR) ? TPASS : TFAIL, "Expect: " FMT, ##__VA_ARGS__);
+#define TST_EXP_EXPR_(EXPR, SEXPR, ...) \
+	tst_res_(__FILE__, __LINE__, (EXPR) ? TPASS : TFAIL, \
+		TST_FMT_("Expect: " TST_2_(dummy, ##__VA_ARGS__, SEXPR), __VA_ARGS__))
+
+#define TST_EXP_EXPR(EXPR, ...) TST_EXP_EXPR_(EXPR, #EXPR, ##__VA_ARGS__)
 
 #endif	/* TST_TEST_MACROS_H__ */
-- 
2.34.1