Sorry for the delay, I was on vacation. (I still am, but I was too ;-).)
On Tue, Jan 7, 2020 at 3:52 AM SeongJae Park sjpark@amazon.com wrote:
On Fri, 27 Dec 2019 13:52:27 +0100 Bernd Petrovitsch bernd@petrovitsch.priv.at wrote:
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Hi all!
On 27/12/2019 13:39, SeongJae Park wrote: [...]
I have a function returning 'unsigned long', and would like to write a =
kunit
test for the function, as below. =20 unsigned long foo(void) { return 42; } =20 static void foo_test(struct kunit *test) { KUNIT_EXPECT_EQ(test, 42, foo()); }
For this case: shouldn't=20 ---- snip ---- static void foo_test(struct kunit *test) { KUNIT_EXPECT_EQ(test, 42ul, foo()); } ---- snip ---- do the trick?
Unfortunately, it doesn't works.
[13:04:58] Building KUnit Kernel ... In file included from /.../linux/include/linux/list.h:9:0, from /.../linux/include/linux/wait.h:7, from /.../linux/include/linux/wait_bit.h:8, from /.../linux/include/linux/fs.h:6, from /.../linux/include/linux/debugfs.h:15, from /.../linux/mm/damon.c:12: /.../linux/mm/damon-test.h: In function ‘damon_test_foo’: /.../linux/include/linux/kernel.h:842:29: warning: comparison of distinct pointer types lacks a cast (!!(sizeof((typeof(x) *)1 == (typeof(y) *)1))) ^ /.../linux/include/kunit/test.h:493:9: note: in expansion of macro ‘__typecheck’ ((void)__typecheck(__left, __right)); \ ^~~~~~~~~~~ /.../linux/include/kunit/test.h:517:2: note: in expansion of macro ‘KUNIT_BASE_BINARY_ASSERTION’ KUNIT_BASE_BINARY_ASSERTION(test, \ ^~~~~~~~~~~~~~~~~~~~~~~~~~~ /.../linux/include/kunit/test.h:606:2: note: in expansion of macro ‘KUNIT_BASE_EQ_MSG_ASSERTION’ KUNIT_BASE_EQ_MSG_ASSERTION(test, \ ^~~~~~~~~~~~~~~~~~~~~~~~~~~ /.../linux/include/kunit/test.h:616:2: note: in expansion of macro ‘KUNIT_BINARY_EQ_MSG_ASSERTION’ KUNIT_BINARY_EQ_MSG_ASSERTION(test, \ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ /.../linux/include/kunit/test.h:979:2: note: in expansion of macro ‘KUNIT_BINARY_EQ_ASSERTION’ KUNIT_BINARY_EQ_ASSERTION(test, KUNIT_EXPECTATION, left, right) ^~~~~~~~~~~~~~~~~~~~~~~~~ /.../linux/mm/damon-test.h:565:2: note: in expansion of macro ‘KUNIT_EXPECT_EQ’ KUNIT_EXPECT_EQ(test, 42ul, (int)foo()); ^~~~~~~~~~~~~~~
Isn't the issue here that you fixed the 42, but are now casting the result of foo() to an int?
Or have you fixed that now too?
Worst case (gross) scenario, you could just cast 42 to whatever type foo() returns.
Some other thoughts?
Thanks, SeongJae Park
MfG, Bernd --=20 "I dislike type abstraction if it has no real reason. And saving on typing is not a good reason - if your typing speed is the main issue when you're coding, you're doing something seriously wrong." - Linus Torvalds