[PATCH] kunit: Reset test status on each param iteration

[Michal Wajdeczko <michal.wajdeczko@xxxxxxxxx>]

If we skip one parametrized test case then test status remains
SKIP for all subsequent test params leading to wrong reports:

$ ./tools/testing/kunit/kunit.py run \
	--kunitconfig ./lib/kunit/.kunitconfig *.example_params*
	--raw_output \

[ ] Starting KUnit Kernel (1/1)...
KTAP version 1
1..1
    # example: initializing suite
    KTAP version 1
    # Subtest: example
    # module: kunit_example_test
    1..1
        KTAP version 1
        # Subtest: example_params_test
    # example_params_test: initializing
    # example_params_test: cleaning up
        ok 1 example value 3 # SKIP unsupported param value 3
    # example_params_test: initializing
    # example_params_test: cleaning up
        ok 2 example value 2 # SKIP unsupported param value 3
    # example_params_test: initializing
    # example_params_test: cleaning up
        ok 3 example value 1 # SKIP unsupported param value 3
    # example_params_test: initializing
    # example_params_test: cleaning up
        ok 4 example value 0 # SKIP unsupported param value 0
    # example_params_test: pass:0 fail:0 skip:4 total:4
    ok 1 example_params_test # SKIP unsupported param value 0
    # example: exiting suite
ok 1 example # SKIP

Reset test status and status comment after each param iteration
to avoid using stale results.

Signed-off-by: Michal Wajdeczko <michal.wajdeczko@xxxxxxxxx>
Cc: David Gow <davidgow@xxxxxxxxxx>
Cc: Rae Moar <rmoar@xxxxxxxxxx>
---
 lib/kunit/kunit-example-test.c | 5 +++--
 lib/kunit/test.c               | 6 ++++--
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/lib/kunit/kunit-example-test.c b/lib/kunit/kunit-example-test.c
index 01a769f35e1d..6bb5c2ef6696 100644
--- a/lib/kunit/kunit-example-test.c
+++ b/lib/kunit/kunit-example-test.c
@@ -190,6 +190,7 @@ static void example_static_stub_test(struct kunit *test)
 static const struct example_param {
 	int value;
 } example_params_array[] = {
+	{ .value = 3, },
 	{ .value = 2, },
 	{ .value = 1, },
 	{ .value = 0, },
@@ -213,8 +214,8 @@ static void example_params_test(struct kunit *test)
 	KUNIT_ASSERT_NOT_NULL(test, param);
 
 	/* Test can be skipped on unsupported param values */
-	if (!param->value)
-		kunit_skip(test, "unsupported param value");
+	if (!is_power_of_2(param->value))
+		kunit_skip(test, "unsupported param value %d", param->value);
 
 	/* You can use param values for parameterized testing */
 	KUNIT_EXPECT_EQ(test, param->value % param->value, 0);
diff --git a/lib/kunit/test.c b/lib/kunit/test.c
index 49698a168437..a53fd7e6d5bf 100644
--- a/lib/kunit/test.c
+++ b/lib/kunit/test.c
@@ -648,12 +648,14 @@ int kunit_run_tests(struct kunit_suite *suite)
 						      param_desc,
 						      test.status_comment);
 
+				kunit_update_stats(&param_stats, test.status);
+
 				/* Get next param. */
 				param_desc[0] = '\0';
 				test.param_value = test_case->generate_params(test.param_value, param_desc);
 				test.param_index++;
-
-				kunit_update_stats(&param_stats, test.status);
+				test.status = KUNIT_SUCCESS;
+				test.status_comment[0] = '\0';
 			}
 		}
 
-- 
2.25.1