Due to the lack of the SKIP directive in the output, if any of the parameterized test was skipped, the parser could not recognize that correctly and was marking the test as PASSED.
This can easily be seen by running the new subtest from patch 1:
$ ./tools/testing/kunit/kunit.py run \ --kunitconfig ./lib/kunit/.kunitconfig *.example_params*
[ ] Starting KUnit Kernel (1/1)... [ ] ============================================================ [ ] =================== example (1 subtest) ==================== [ ] =================== example_params_test =================== [ ] [PASSED] example value 2 [ ] [PASSED] example value 1 [ ] [PASSED] example value 0 [ ] =============== [PASSED] example_params_test =============== [ ] ===================== [PASSED] example ===================== [ ] ============================================================ [ ] Testing complete. Ran 3 tests: passed: 3
$ ./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 1..1 KTAP version 1 # Subtest: example_params_test # example_params_test: initializing ok 1 example value 2 # example_params_test: initializing ok 2 example value 1 # example_params_test: initializing ok 3 example value 0 # example_params_test: pass:2 fail:0 skip:1 total:3 ok 1 example_params_test # Totals: pass:2 fail:0 skip:1 total:3 ok 1 example
After adding the SKIP directive, the report looks as expected:
[ ] Starting KUnit Kernel (1/1)... [ ] ============================================================ [ ] =================== example (1 subtest) ==================== [ ] =================== example_params_test =================== [ ] [PASSED] example value 2 [ ] [PASSED] example value 1 [ ] [SKIPPED] example value 0 [ ] =============== [PASSED] example_params_test =============== [ ] ===================== [PASSED] example ===================== [ ] ============================================================ [ ] Testing complete. Ran 3 tests: passed: 2, skipped: 1
[ ] Starting KUnit Kernel (1/1)... KTAP version 1 1..1 # example: initializing suite KTAP version 1 # Subtest: example 1..1 KTAP version 1 # Subtest: example_params_test # example_params_test: initializing ok 1 example value 2 # example_params_test: initializing ok 2 example value 1 # example_params_test: initializing ok 3 example value 0 # SKIP unsupported param value # example_params_test: pass:2 fail:0 skip:1 total:3 ok 1 example_params_test # Totals: pass:2 fail:0 skip:1 total:3 ok 1 example
Cc: David Gow davidgow@google.com
Michal Wajdeczko (3): kunit/test: Add example test showing parameterized testing kunit: Fix reporting of the skipped parameterized tests kunit: Update reporting function to support results from subtests
lib/kunit/kunit-example-test.c | 34 ++++++++++++++++++++++++++++++++++ lib/kunit/test.c | 26 +++++++++++++++++--------- 2 files changed, 51 insertions(+), 9 deletions(-)
Use of parameterized testing is documented [1] but such use case is not present in demo kunit test. Add small subtest for that.
[1] https://kernel.org/doc/html/latest/dev-tools/kunit/usage.html#parameterized-...
Signed-off-by: Michal Wajdeczko michal.wajdeczko@intel.com Cc: David Gow davidgow@google.com --- lib/kunit/kunit-example-test.c | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+)
diff --git a/lib/kunit/kunit-example-test.c b/lib/kunit/kunit-example-test.c index cd8b7e51d02b..775443f77763 100644 --- a/lib/kunit/kunit-example-test.c +++ b/lib/kunit/kunit-example-test.c @@ -167,6 +167,39 @@ static void example_static_stub_test(struct kunit *test) KUNIT_EXPECT_EQ(test, add_one(1), 2); }
+static const struct example_param { + int value; +} example_params_array[] = { + { .value = 2, }, + { .value = 1, }, + { .value = 0, }, +}; + +static void example_param_get_desc(const struct example_param *p, char *desc) +{ + snprintf(desc, KUNIT_PARAM_DESC_SIZE, "example value %d", p->value); +} + +KUNIT_ARRAY_PARAM(example, example_params_array, example_param_get_desc); + +/* + * This test shows the use of params. + */ +static void example_params_test(struct kunit *test) +{ + const struct example_param *param = test->param_value; + + /* By design, param pointer will not be NULL */ + KUNIT_ASSERT_NOT_NULL(test, param); + + /* Test can be skipped on unsupported param values */ + if (!param->value) + kunit_skip(test, "unsupported param value"); + + /* You can use param values for parameterized testing */ + KUNIT_EXPECT_EQ(test, param->value % param->value, 0); +} + /* * Here we make a list of all the test cases we want to add to the test suite * below. @@ -183,6 +216,7 @@ static struct kunit_case example_test_cases[] = { KUNIT_CASE(example_mark_skipped_test), KUNIT_CASE(example_all_expect_macros_test), KUNIT_CASE(example_static_stub_test), + KUNIT_CASE_PARAM(example_params_test, example_gen_params), {} };
On Tue, Apr 11, 2023 at 12:01 PM Michal Wajdeczko michal.wajdeczko@intel.com wrote:
Use of parameterized testing is documented [1] but such use case is not present in demo kunit test. Add small subtest for that.
[1] https://kernel.org/doc/html/latest/dev-tools/kunit/usage.html#parameterized-...
Signed-off-by: Michal Wajdeczko michal.wajdeczko@intel.com Cc: David Gow davidgow@google.com
Hello!
This looks all pretty good to me! I only have one comment. In the KTAP output:
KTAP version 1 # Subtest: example_params_test # example_params_test: initializing ok 1 example value 2 # example_params_test: initializing ok 2 example value 1 # example_params_test: initializing ok 3 example value 0 # SKIP unsupported param value # example_params_test: pass:2 fail:0 skip:1 total:3 ok 6 example_params_test
The init method is causing the "# example_params_test: initializing" to print lines for each case. However, since they are not inline with the correct indentation and they don't include helpful test data, I would consider finding a way to remove these.
We could consider removing these lines from the test suite as a whole. However, they are helpful in that they show how to use the init function. Maybe check if the test is a param test case in the init function itself? Let me know what you think.
Thanks!
Rae
lib/kunit/kunit-example-test.c | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+)
diff --git a/lib/kunit/kunit-example-test.c b/lib/kunit/kunit-example-test.c index cd8b7e51d02b..775443f77763 100644 --- a/lib/kunit/kunit-example-test.c +++ b/lib/kunit/kunit-example-test.c @@ -167,6 +167,39 @@ static void example_static_stub_test(struct kunit *test) KUNIT_EXPECT_EQ(test, add_one(1), 2); }
+static const struct example_param {
int value;+} example_params_array[] = {
{ .value = 2, },{ .value = 1, },{ .value = 0, },+};
+static void example_param_get_desc(const struct example_param *p, char *desc) +{
snprintf(desc, KUNIT_PARAM_DESC_SIZE, "example value %d", p->value);+}
+KUNIT_ARRAY_PARAM(example, example_params_array, example_param_get_desc);
+/*
- This test shows the use of params.
- */
+static void example_params_test(struct kunit *test) +{
const struct example_param *param = test->param_value;/* By design, param pointer will not be NULL */KUNIT_ASSERT_NOT_NULL(test, param);/* Test can be skipped on unsupported param values */if (!param->value)kunit_skip(test, "unsupported param value");/* You can use param values for parameterized testing */KUNIT_EXPECT_EQ(test, param->value % param->value, 0);+}
/*
- Here we make a list of all the test cases we want to add to the test suite
- below.
@@ -183,6 +216,7 @@ static struct kunit_case example_test_cases[] = { KUNIT_CASE(example_mark_skipped_test), KUNIT_CASE(example_all_expect_macros_test), KUNIT_CASE(example_static_stub_test),
KUNIT_CASE_PARAM(example_params_test, example_gen_params), {}};
-- 2.25.1
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On Thu, 13 Apr 2023 at 04:51, Rae Moar rmoar@google.com wrote:
On Tue, Apr 11, 2023 at 12:01 PM Michal Wajdeczko michal.wajdeczko@intel.com wrote:
Use of parameterized testing is documented [1] but such use case is not present in demo kunit test. Add small subtest for that.
[1] https://kernel.org/doc/html/latest/dev-tools/kunit/usage.html#parameterized-...
Signed-off-by: Michal Wajdeczko michal.wajdeczko@intel.com Cc: David Gow davidgow@google.com
Hello!
This looks all pretty good to me! I only have one comment. In the KTAP output:
KTAP version 1 # Subtest: example_params_test # example_params_test: initializing ok 1 example value 2 # example_params_test: initializing ok 2 example value 1 # example_params_test: initializing ok 3 example value 0 # SKIP unsupported param value # example_params_test: pass:2 fail:0 skip:1 total:3 ok 6 example_params_testThe init method is causing the "# example_params_test: initializing" to print lines for each case. However, since they are not inline with the correct indentation and they don't include helpful test data, I would consider finding a way to remove these.
I think this is probably a problem for the kunit_log() infrastructure, rather than init functions in general.
I'm not worried about them in relation to this particular test.
We could consider removing these lines from the test suite as a whole. However, they are helpful in that they show how to use the init function. Maybe check if the test is a param test case in the init function itself? Let me know what you think.
I'd rather keep these as-is: the idea is to have a very simple example of an init function, and complicating further by checking which test is running is needless complexity, IMO.
-- David
On Wed, 12 Apr 2023 at 00:01, Michal Wajdeczko michal.wajdeczko@intel.com wrote:
Use of parameterized testing is documented [1] but such use case is not present in demo kunit test. Add small subtest for that.
[1] https://kernel.org/doc/html/latest/dev-tools/kunit/usage.html#parameterized-...
Signed-off-by: Michal Wajdeczko michal.wajdeczko@intel.com Cc: David Gow davidgow@google.com
Thanks: this is a long-overdue addition to the KUnit examples.
Reviewed-by: David Gow davidgow@google.com
Cheers, -- David
lib/kunit/kunit-example-test.c | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+)
diff --git a/lib/kunit/kunit-example-test.c b/lib/kunit/kunit-example-test.c index cd8b7e51d02b..775443f77763 100644 --- a/lib/kunit/kunit-example-test.c +++ b/lib/kunit/kunit-example-test.c @@ -167,6 +167,39 @@ static void example_static_stub_test(struct kunit *test) KUNIT_EXPECT_EQ(test, add_one(1), 2); }
+static const struct example_param {
int value;+} example_params_array[] = {
{ .value = 2, },{ .value = 1, },{ .value = 0, },+};
+static void example_param_get_desc(const struct example_param *p, char *desc) +{
snprintf(desc, KUNIT_PARAM_DESC_SIZE, "example value %d", p->value);+}
+KUNIT_ARRAY_PARAM(example, example_params_array, example_param_get_desc);
+/*
- This test shows the use of params.
- */
+static void example_params_test(struct kunit *test) +{
const struct example_param *param = test->param_value;/* By design, param pointer will not be NULL */KUNIT_ASSERT_NOT_NULL(test, param);/* Test can be skipped on unsupported param values */if (!param->value)kunit_skip(test, "unsupported param value");/* You can use param values for parameterized testing */KUNIT_EXPECT_EQ(test, param->value % param->value, 0);+}
/*
- Here we make a list of all the test cases we want to add to the test suite
- below.
@@ -183,6 +216,7 @@ static struct kunit_case example_test_cases[] = { KUNIT_CASE(example_mark_skipped_test), KUNIT_CASE(example_all_expect_macros_test), KUNIT_CASE(example_static_stub_test),
KUNIT_CASE_PARAM(example_params_test, example_gen_params), {}};
-- 2.25.1
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Logs from the parameterized tests that were skipped don't include SKIP directive thus they are displayed as PASSED. Fix that.
Signed-off-by: Michal Wajdeczko michal.wajdeczko@intel.com Cc: David Gow davidgow@google.com --- lib/kunit/test.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/lib/kunit/test.c b/lib/kunit/test.c index c9e15bb60058..5679197b5f8a 100644 --- a/lib/kunit/test.c +++ b/lib/kunit/test.c @@ -556,9 +556,11 @@ int kunit_run_tests(struct kunit_suite *suite)
kunit_log(KERN_INFO, &test, KUNIT_SUBTEST_INDENT KUNIT_SUBTEST_INDENT - "%s %d %s", + "%s %d %s%s%s", kunit_status_to_ok_not_ok(test.status), - test.param_index + 1, param_desc); + test.param_index + 1, param_desc, + test.status == KUNIT_SKIPPED ? " # SKIP " : "", + test.status == KUNIT_SKIPPED ? test.status_comment : "");
/* Get next param. */ param_desc[0] = '\0';
On Tue, Apr 11, 2023 at 12:01 PM Michal Wajdeczko michal.wajdeczko@intel.com wrote:
Logs from the parameterized tests that were skipped don't include SKIP directive thus they are displayed as PASSED. Fix that.
Hi Michal!
This fix looks good to me. Thanks for fixing this!
The only comment I would have for this patch is if we should consider using an altered version of kunit_print_ok_not_ok() here instead. However, it seems you address this in the next patch.
Thanks again, Rae
Reviewed-by: Rae Moar rmoar@google.com
Signed-off-by: Michal Wajdeczko michal.wajdeczko@intel.com Cc: David Gow davidgow@google.com
lib/kunit/test.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/lib/kunit/test.c b/lib/kunit/test.c index c9e15bb60058..5679197b5f8a 100644 --- a/lib/kunit/test.c +++ b/lib/kunit/test.c @@ -556,9 +556,11 @@ int kunit_run_tests(struct kunit_suite *suite)
kunit_log(KERN_INFO, &test, KUNIT_SUBTEST_INDENT KUNIT_SUBTEST_INDENT
"%s %d %s",
"%s %d %s%s%s", kunit_status_to_ok_not_ok(test.status),
test.param_index + 1, param_desc);
test.param_index + 1, param_desc,test.status == KUNIT_SKIPPED ? " # SKIP " : "",test.status == KUNIT_SKIPPED ? test.status_comment : ""); /* Get next param. */ param_desc[0] = '\0';-- 2.25.1
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On Wed, 12 Apr 2023 at 00:01, Michal Wajdeczko michal.wajdeczko@intel.com wrote:
Logs from the parameterized tests that were skipped don't include SKIP directive thus they are displayed as PASSED. Fix that.
Signed-off-by: Michal Wajdeczko michal.wajdeczko@intel.com Cc: David Gow davidgow@google.com
Nice catch, thanks!
Reviewed-by: David Gow davidgow@google.com
Cheers, -- David
lib/kunit/test.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/lib/kunit/test.c b/lib/kunit/test.c index c9e15bb60058..5679197b5f8a 100644 --- a/lib/kunit/test.c +++ b/lib/kunit/test.c @@ -556,9 +556,11 @@ int kunit_run_tests(struct kunit_suite *suite)
kunit_log(KERN_INFO, &test, KUNIT_SUBTEST_INDENT KUNIT_SUBTEST_INDENT
"%s %d %s",
"%s %d %s%s%s", kunit_status_to_ok_not_ok(test.status),
test.param_index + 1, param_desc);
test.param_index + 1, param_desc,test.status == KUNIT_SKIPPED ? " # SKIP " : "",test.status == KUNIT_SKIPPED ? test.status_comment : ""); /* Get next param. */ param_desc[0] = '\0';-- 2.25.1
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There is function to report status of either suite or test, but it doesn't support parameterized subtests that have to log report on its own. Extend it to also accept subtest level results to avoid code duplication.
Signed-off-by: Michal Wajdeczko michal.wajdeczko@intel.com Cc: David Gow davidgow@google.com --- lib/kunit/test.c | 28 +++++++++++++++++----------- 1 file changed, 17 insertions(+), 11 deletions(-)
diff --git a/lib/kunit/test.c b/lib/kunit/test.c index 5679197b5f8a..692fce258c5b 100644 --- a/lib/kunit/test.c +++ b/lib/kunit/test.c @@ -154,8 +154,14 @@ static void kunit_print_suite_start(struct kunit_suite *suite) kunit_suite_num_test_cases(suite)); }
+enum kunit_test_or_suite { + KUNIT_SUITE = 0, + KUNIT_TEST, + KUNIT_SUBTEST, +}; + static void kunit_print_ok_not_ok(void *test_or_suite, - bool is_test, + enum kunit_test_or_suite is_test, enum kunit_status status, size_t test_number, const char *description, @@ -180,7 +186,9 @@ static void kunit_print_ok_not_ok(void *test_or_suite, (status == KUNIT_SKIPPED) ? directive : ""); else kunit_log(KERN_INFO, test, - KUNIT_SUBTEST_INDENT "%s %zd %s%s%s", + "%.*s%s %zd %s%s%s", + (int) strlen(KUNIT_SUBTEST_INDENT) * is_test, + KUNIT_SUBTEST_INDENT KUNIT_SUBTEST_INDENT, kunit_status_to_ok_not_ok(status), test_number, description, directive_header, (status == KUNIT_SKIPPED) ? directive : ""); @@ -209,7 +217,7 @@ static size_t kunit_suite_counter = 1;
static void kunit_print_suite_end(struct kunit_suite *suite) { - kunit_print_ok_not_ok((void *)suite, false, + kunit_print_ok_not_ok((void *)suite, KUNIT_SUITE, kunit_suite_has_succeeded(suite), kunit_suite_counter++, suite->name, @@ -554,13 +562,11 @@ int kunit_run_tests(struct kunit_suite *suite) "param-%d", test.param_index); }
- kunit_log(KERN_INFO, &test, - KUNIT_SUBTEST_INDENT KUNIT_SUBTEST_INDENT - "%s %d %s%s%s", - kunit_status_to_ok_not_ok(test.status), - test.param_index + 1, param_desc, - test.status == KUNIT_SKIPPED ? " # SKIP " : "", - test.status == KUNIT_SKIPPED ? test.status_comment : ""); + kunit_print_ok_not_ok(&test, KUNIT_SUBTEST, + test.status, + test.param_index + 1, + param_desc, + test.status_comment);
/* Get next param. */ param_desc[0] = '\0'; @@ -574,7 +580,7 @@ int kunit_run_tests(struct kunit_suite *suite)
kunit_print_test_stats(&test, param_stats);
- kunit_print_ok_not_ok(&test, true, test_case->status, + kunit_print_ok_not_ok(&test, KUNIT_TEST, test_case->status, kunit_test_case_num(suite, test_case), test_case->name, test.status_comment);
On Tue, Apr 11, 2023 at 12:01 PM Michal Wajdeczko michal.wajdeczko@intel.com wrote:
There is function to report status of either suite or test, but it doesn't support parameterized subtests that have to log report on its own. Extend it to also accept subtest level results to avoid code duplication.
Signed-off-by: Michal Wajdeczko michal.wajdeczko@intel.com Cc: David Gow davidgow@google.com
lib/kunit/test.c | 28 +++++++++++++++++----------- 1 file changed, 17 insertions(+), 11 deletions(-)
diff --git a/lib/kunit/test.c b/lib/kunit/test.c index 5679197b5f8a..692fce258c5b 100644 --- a/lib/kunit/test.c +++ b/lib/kunit/test.c @@ -154,8 +154,14 @@ static void kunit_print_suite_start(struct kunit_suite *suite) kunit_suite_num_test_cases(suite)); }
+enum kunit_test_or_suite {
KUNIT_SUITE = 0,KUNIT_TEST,KUNIT_SUBTEST,+};
Hi Michal!
Since KUnit's goal is to progress toward supporting arbitrary levels of testing, I like the idea of starting to adjust these helper functions to allow for greater levels of testing.
However, I'm not sure about this kunit_test_or_suite enum. If our goal is to support an arbitrary number of levels of tests then this enum still limits us to a finite number of levels. However, if we only want to focus on supporting parameterized tests (which is our direct goal), this could be the right solution.
Maybe instead we could use an integer denoting the test level instead? This would remove the limit but would also remove the nice names of the levels.
I'm curious what others opinions are on these ideas?
A bit of a nit: if we do use this enum I wonder if we could clarify the name to be kunit_test_level as the current name of kunit_test_or_suite seems to indicate to me a binary of two options rather than three.
static void kunit_print_ok_not_ok(void *test_or_suite,
bool is_test,
enum kunit_test_or_suite is_test,
Similar to above, I think the name of is_test could be clarified. It is currently a bit confusing to me as they are all tests. Maybe test_level?
enum kunit_status status, size_t test_number, const char *description,@@ -180,7 +186,9 @@ static void kunit_print_ok_not_ok(void *test_or_suite, (status == KUNIT_SKIPPED) ? directive : ""); else kunit_log(KERN_INFO, test,
KUNIT_SUBTEST_INDENT "%s %zd %s%s%s",
"%.*s%s %zd %s%s%s",(int) strlen(KUNIT_SUBTEST_INDENT) * is_test,
I would consider saving the length of KUNIT_SUBTEST_INDENT as a macro. Maybe KUNIT_INDENT_LEN?
KUNIT_SUBTEST_INDENT KUNIT_SUBTEST_INDENT, kunit_status_to_ok_not_ok(status), test_number, description, directive_header, (status == KUNIT_SKIPPED) ? directive : "");@@ -209,7 +217,7 @@ static size_t kunit_suite_counter = 1;
static void kunit_print_suite_end(struct kunit_suite *suite) {
kunit_print_ok_not_ok((void *)suite, false,
kunit_print_ok_not_ok((void *)suite, KUNIT_SUITE, kunit_suite_has_succeeded(suite), kunit_suite_counter++, suite->name,@@ -554,13 +562,11 @@ int kunit_run_tests(struct kunit_suite *suite) "param-%d", test.param_index); }
kunit_log(KERN_INFO, &test,KUNIT_SUBTEST_INDENT KUNIT_SUBTEST_INDENT"%s %d %s%s%s",kunit_status_to_ok_not_ok(test.status),test.param_index + 1, param_desc,test.status == KUNIT_SKIPPED ? " # SKIP " : "",test.status == KUNIT_SKIPPED ? test.status_comment : "");
kunit_print_ok_not_ok(&test, KUNIT_SUBTEST,test.status,test.param_index + 1,param_desc,test.status_comment); /* Get next param. */ param_desc[0] = '\0';@@ -574,7 +580,7 @@ int kunit_run_tests(struct kunit_suite *suite)
kunit_print_test_stats(&test, param_stats);
kunit_print_ok_not_ok(&test, true, test_case->status,
kunit_print_ok_not_ok(&test, KUNIT_TEST, test_case->status, kunit_test_case_num(suite, test_case), test_case->name, test.status_comment);-- 2.25.1
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On Thu, 13 Apr 2023 at 04:28, Rae Moar rmoar@google.com wrote:
On Tue, Apr 11, 2023 at 12:01 PM Michal Wajdeczko michal.wajdeczko@intel.com wrote:
There is function to report status of either suite or test, but it doesn't support parameterized subtests that have to log report on its own. Extend it to also accept subtest level results to avoid code duplication.
Signed-off-by: Michal Wajdeczko michal.wajdeczko@intel.com Cc: David Gow davidgow@google.com
lib/kunit/test.c | 28 +++++++++++++++++----------- 1 file changed, 17 insertions(+), 11 deletions(-)
diff --git a/lib/kunit/test.c b/lib/kunit/test.c index 5679197b5f8a..692fce258c5b 100644 --- a/lib/kunit/test.c +++ b/lib/kunit/test.c @@ -154,8 +154,14 @@ static void kunit_print_suite_start(struct kunit_suite *suite) kunit_suite_num_test_cases(suite)); }
+enum kunit_test_or_suite {
KUNIT_SUITE = 0,KUNIT_TEST,KUNIT_SUBTEST,+};
Hi Michal!
Since KUnit's goal is to progress toward supporting arbitrary levels of testing, I like the idea of starting to adjust these helper functions to allow for greater levels of testing.
However, I'm not sure about this kunit_test_or_suite enum. If our goal is to support an arbitrary number of levels of tests then this enum still limits us to a finite number of levels. However, if we only want to focus on supporting parameterized tests (which is our direct goal), this could be the right solution.
Maybe instead we could use an integer denoting the test level instead? This would remove the limit but would also remove the nice names of the levels.
I'm curious what others opinions are on these ideas?
A bit of a nit: if we do use this enum I wonder if we could clarify the name to be kunit_test_level as the current name of kunit_test_or_suite seems to indicate to me a binary of two options rather than three.
static void kunit_print_ok_not_ok(void *test_or_suite,
bool is_test,
enum kunit_test_or_suite is_test,Similar to above, I think the name of is_test could be clarified. It is currently a bit confusing to me as they are all tests. Maybe test_level?
I agree with Rae that this is not the ideal long-term solution.
We're basically encoding two things here: - Are we dealing with a 'struct kunit_suite' or a 'struct kunit'? - How nested the test is.
Given KUnit originally only had a 2-level nesting (suite->test), and now has 3-level nesting (always suite->test[->param]), this works, but the KTAP format permits arbitrary nesting of tests, and we'll want to have something like that in KUnit going forward. We don't have a design for that yet, but it could conceivably allow nested suites, thus breaking the rule that nesting level 0 is always a suite, and the rest are all tests.
So there's definitely a part of me that would prefer to pass those two pieces of information in separate arguments, rather than relying on an enum like this.
That being said, this is all very fuzzy future plans, rather than anything concrete, and this will all likely need reworking if we do anything drastic anyway, so I'm not worried if we go with this for now, and change it when we need to. I do think it's an improvement over what we're doing currently. (For example, another possible implementation for nested tests could be to get rid of the distinction between tests and suites completely: or at least have them share 'struct kunit', so this wouldn't need passing in separately.)
Cheers, -- David
enum kunit_status status, size_t test_number, const char *description,@@ -180,7 +186,9 @@ static void kunit_print_ok_not_ok(void *test_or_suite, (status == KUNIT_SKIPPED) ? directive : ""); else kunit_log(KERN_INFO, test,
KUNIT_SUBTEST_INDENT "%s %zd %s%s%s",
"%.*s%s %zd %s%s%s",(int) strlen(KUNIT_SUBTEST_INDENT) * is_test,I would consider saving the length of KUNIT_SUBTEST_INDENT as a macro. Maybe KUNIT_INDENT_LEN?
KUNIT_SUBTEST_INDENT KUNIT_SUBTEST_INDENT, kunit_status_to_ok_not_ok(status), test_number, description, directive_header, (status == KUNIT_SKIPPED) ? directive : "");@@ -209,7 +217,7 @@ static size_t kunit_suite_counter = 1;
static void kunit_print_suite_end(struct kunit_suite *suite) {
kunit_print_ok_not_ok((void *)suite, false,
kunit_print_ok_not_ok((void *)suite, KUNIT_SUITE, kunit_suite_has_succeeded(suite), kunit_suite_counter++, suite->name,@@ -554,13 +562,11 @@ int kunit_run_tests(struct kunit_suite *suite) "param-%d", test.param_index); }
kunit_log(KERN_INFO, &test,KUNIT_SUBTEST_INDENT KUNIT_SUBTEST_INDENT"%s %d %s%s%s",kunit_status_to_ok_not_ok(test.status),test.param_index + 1, param_desc,test.status == KUNIT_SKIPPED ? " # SKIP " : "",test.status == KUNIT_SKIPPED ? test.status_comment : "");
kunit_print_ok_not_ok(&test, KUNIT_SUBTEST,test.status,test.param_index + 1,param_desc,test.status_comment); /* Get next param. */ param_desc[0] = '\0';@@ -574,7 +580,7 @@ int kunit_run_tests(struct kunit_suite *suite)
kunit_print_test_stats(&test, param_stats);
kunit_print_ok_not_ok(&test, true, test_case->status,
kunit_print_ok_not_ok(&test, KUNIT_TEST, test_case->status, kunit_test_case_num(suite, test_case), test_case->name, test.status_comment);-- 2.25.1
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On 13.04.2023 08:31, David Gow wrote:
On Thu, 13 Apr 2023 at 04:28, Rae Moar rmoar@google.com wrote:
On Tue, Apr 11, 2023 at 12:01 PM Michal Wajdeczko michal.wajdeczko@intel.com wrote:
There is function to report status of either suite or test, but it doesn't support parameterized subtests that have to log report on its own. Extend it to also accept subtest level results to avoid code duplication.
Signed-off-by: Michal Wajdeczko michal.wajdeczko@intel.com Cc: David Gow davidgow@google.com
lib/kunit/test.c | 28 +++++++++++++++++----------- 1 file changed, 17 insertions(+), 11 deletions(-)
diff --git a/lib/kunit/test.c b/lib/kunit/test.c index 5679197b5f8a..692fce258c5b 100644 --- a/lib/kunit/test.c +++ b/lib/kunit/test.c @@ -154,8 +154,14 @@ static void kunit_print_suite_start(struct kunit_suite *suite) kunit_suite_num_test_cases(suite)); }
+enum kunit_test_or_suite {
KUNIT_SUITE = 0,KUNIT_TEST,KUNIT_SUBTEST,+};
Hi Michal!
Since KUnit's goal is to progress toward supporting arbitrary levels of testing, I like the idea of starting to adjust these helper functions to allow for greater levels of testing.
However, I'm not sure about this kunit_test_or_suite enum. If our goal is to support an arbitrary number of levels of tests then this enum still limits us to a finite number of levels. However, if we only want to focus on supporting parameterized tests (which is our direct goal), this could be the right solution.
Maybe instead we could use an integer denoting the test level instead? This would remove the limit but would also remove the nice names of the levels.
we can use integer as param but at the same time we can also have define or anonymous enum as nice aliases to currently known/used levels:
/* Currently supported test levels */ enum { KUNIT_LEVEL_SUITE = 0, KUNIT_LEVEL_TEST, KUNIT_LEVEL_PARAMTEST, };
/* Future levels are TBD */ #define KUNIT_LEVEL_SUBTEST(n) (KUNIT_LEVEL_TEST + (n))
I'm curious what others opinions are on these ideas?
A bit of a nit: if we do use this enum I wonder if we could clarify the name to be kunit_test_level as the current name of kunit_test_or_suite seems to indicate to me a binary of two options rather than three.
static void kunit_print_ok_not_ok(void *test_or_suite,
bool is_test,
enum kunit_test_or_suite is_test,Similar to above, I think the name of is_test could be clarified. It is currently a bit confusing to me as they are all tests. Maybe test_level?
ok
I agree with Rae that this is not the ideal long-term solution.
We're basically encoding two things here:
- Are we dealing with a 'struct kunit_suite' or a 'struct kunit'?
- How nested the test is.
Given KUnit originally only had a 2-level nesting (suite->test), and now has 3-level nesting (always suite->test[->param]), this works, but the KTAP format permits arbitrary nesting of tests, and we'll want to have something like that in KUnit going forward. We don't have a design for that yet, but it could conceivably allow nested suites, thus breaking the rule that nesting level 0 is always a suite, and the rest are all tests.
I guess "We don't have a design for that yet" is a key here
So there's definitely a part of me that would prefer to pass those two pieces of information in separate arguments, rather than relying on an enum like this.
That being said, this is all very fuzzy future plans, rather than anything concrete, and this will all likely need reworking if we do anything drastic anyway, so I'm not worried if we go with this for now, and change it when we need to. I do think it's an improvement over what we're doing currently. (For example, another possible implementation for nested tests could be to get rid of the distinction between tests and suites completely: or at least have them share 'struct kunit', so this wouldn't need passing in separately.)
maybe the problem will go away once we just replace this untyped param:
kunit_print_ok_not_ok(void *test_or_suite, ...
with proper type:
kunit_print_ok_not_ok(struct kunit *test, ...
and treat NULL as indication that we just want to print raw results (as it looks function is not using any suite attributes directly, all input is passed explicitly and kunit_log() expects test only)
Thanks, Michal
Cheers, -- David
enum kunit_status status, size_t test_number, const char *description,@@ -180,7 +186,9 @@ static void kunit_print_ok_not_ok(void *test_or_suite, (status == KUNIT_SKIPPED) ? directive : ""); else kunit_log(KERN_INFO, test,
KUNIT_SUBTEST_INDENT "%s %zd %s%s%s",
"%.*s%s %zd %s%s%s",(int) strlen(KUNIT_SUBTEST_INDENT) * is_test,I would consider saving the length of KUNIT_SUBTEST_INDENT as a macro. Maybe KUNIT_INDENT_LEN?
KUNIT_SUBTEST_INDENT KUNIT_SUBTEST_INDENT, kunit_status_to_ok_not_ok(status), test_number, description, directive_header, (status == KUNIT_SKIPPED) ? directive : "");@@ -209,7 +217,7 @@ static size_t kunit_suite_counter = 1;
static void kunit_print_suite_end(struct kunit_suite *suite) {
kunit_print_ok_not_ok((void *)suite, false,
kunit_print_ok_not_ok((void *)suite, KUNIT_SUITE, kunit_suite_has_succeeded(suite), kunit_suite_counter++, suite->name,@@ -554,13 +562,11 @@ int kunit_run_tests(struct kunit_suite *suite) "param-%d", test.param_index); }
kunit_log(KERN_INFO, &test,KUNIT_SUBTEST_INDENT KUNIT_SUBTEST_INDENT"%s %d %s%s%s",kunit_status_to_ok_not_ok(test.status),test.param_index + 1, param_desc,test.status == KUNIT_SKIPPED ? " # SKIP " : "",test.status == KUNIT_SKIPPED ? test.status_comment : "");
kunit_print_ok_not_ok(&test, KUNIT_SUBTEST,test.status,test.param_index + 1,param_desc,test.status_comment); /* Get next param. */ param_desc[0] = '\0';@@ -574,7 +580,7 @@ int kunit_run_tests(struct kunit_suite *suite)
kunit_print_test_stats(&test, param_stats);
kunit_print_ok_not_ok(&test, true, test_case->status,
kunit_print_ok_not_ok(&test, KUNIT_TEST, test_case->status, kunit_test_case_num(suite, test_case), test_case->name, test.status_comment);-- 2.25.1
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On Thu, 13 Apr 2023 at 21:15, Michal Wajdeczko michal.wajdeczko@intel.com wrote:
On 13.04.2023 08:31, David Gow wrote:
On Thu, 13 Apr 2023 at 04:28, Rae Moar rmoar@google.com wrote:
On Tue, Apr 11, 2023 at 12:01 PM Michal Wajdeczko michal.wajdeczko@intel.com wrote:
There is function to report status of either suite or test, but it doesn't support parameterized subtests that have to log report on its own. Extend it to also accept subtest level results to avoid code duplication.
Signed-off-by: Michal Wajdeczko michal.wajdeczko@intel.com Cc: David Gow davidgow@google.com
lib/kunit/test.c | 28 +++++++++++++++++----------- 1 file changed, 17 insertions(+), 11 deletions(-)
diff --git a/lib/kunit/test.c b/lib/kunit/test.c index 5679197b5f8a..692fce258c5b 100644 --- a/lib/kunit/test.c +++ b/lib/kunit/test.c @@ -154,8 +154,14 @@ static void kunit_print_suite_start(struct kunit_suite *suite) kunit_suite_num_test_cases(suite)); }
+enum kunit_test_or_suite {
KUNIT_SUITE = 0,KUNIT_TEST,KUNIT_SUBTEST,+};
Hi Michal!
Since KUnit's goal is to progress toward supporting arbitrary levels of testing, I like the idea of starting to adjust these helper functions to allow for greater levels of testing.
However, I'm not sure about this kunit_test_or_suite enum. If our goal is to support an arbitrary number of levels of tests then this enum still limits us to a finite number of levels. However, if we only want to focus on supporting parameterized tests (which is our direct goal), this could be the right solution.
Maybe instead we could use an integer denoting the test level instead? This would remove the limit but would also remove the nice names of the levels.
we can use integer as param but at the same time we can also have define or anonymous enum as nice aliases to currently known/used levels:
/* Currently supported test levels */ enum { KUNIT_LEVEL_SUITE = 0, KUNIT_LEVEL_TEST, KUNIT_LEVEL_PARAMTEST, };
/* Future levels are TBD */ #define KUNIT_LEVEL_SUBTEST(n) (KUNIT_LEVEL_TEST + (n))
This sounds good to me!
I'm curious what others opinions are on these ideas?
A bit of a nit: if we do use this enum I wonder if we could clarify the name to be kunit_test_level as the current name of kunit_test_or_suite seems to indicate to me a binary of two options rather than three.
static void kunit_print_ok_not_ok(void *test_or_suite,
bool is_test,
enum kunit_test_or_suite is_test,Similar to above, I think the name of is_test could be clarified. It is currently a bit confusing to me as they are all tests. Maybe test_level?
ok
I agree with Rae that this is not the ideal long-term solution.
We're basically encoding two things here:
- Are we dealing with a 'struct kunit_suite' or a 'struct kunit'?
- How nested the test is.
Given KUnit originally only had a 2-level nesting (suite->test), and now has 3-level nesting (always suite->test[->param]), this works, but the KTAP format permits arbitrary nesting of tests, and we'll want to have something like that in KUnit going forward. We don't have a design for that yet, but it could conceivably allow nested suites, thus breaking the rule that nesting level 0 is always a suite, and the rest are all tests.
I guess "We don't have a design for that yet" is a key here
Yeah: I wouldn't worry too much about what the future design would bring, tbh. As long as we don't totally paint ourselves into a corner (and I don't think anything in this patch is at risk of doing that), then doing whatever is sensible for the way things are now works.
So there's definitely a part of me that would prefer to pass those two pieces of information in separate arguments, rather than relying on an enum like this.
That being said, this is all very fuzzy future plans, rather than anything concrete, and this will all likely need reworking if we do anything drastic anyway, so I'm not worried if we go with this for now, and change it when we need to. I do think it's an improvement over what we're doing currently. (For example, another possible implementation for nested tests could be to get rid of the distinction between tests and suites completely: or at least have them share 'struct kunit', so this wouldn't need passing in separately.)
maybe the problem will go away once we just replace this untyped param:
kunit_print_ok_not_ok(void *test_or_suite, ...with proper type:
kunit_print_ok_not_ok(struct kunit *test, ...and treat NULL as indication that we just want to print raw results (as it looks function is not using any suite attributes directly, all input is passed explicitly and kunit_log() expects test only)
Yeah: I think that makes sense. Suite results are still handled separately in debugfs as well.
Cheers, -- David
On Wed, 12 Apr 2023 at 00:01, Michal Wajdeczko michal.wajdeczko@intel.com wrote:
There is function to report status of either suite or test, but it doesn't support parameterized subtests that have to log report on its own. Extend it to also accept subtest level results to avoid code duplication.
Signed-off-by: Michal Wajdeczko michal.wajdeczko@intel.com Cc: David Gow davidgow@google.com
Thanks: this is definitely an improvement on how we handle this.
There's definitely more we can do, particularly looking forward to supporting more complex test hierarchies in the future, but getting everything under kunit_print_ok_not_ok is an improvement regardless of when happens down the line.
My only real concern is that the way the indent is printed is a bit subtle and difficult to understand fully on first glance. I've added some notes below.
lib/kunit/test.c | 28 +++++++++++++++++----------- 1 file changed, 17 insertions(+), 11 deletions(-)
diff --git a/lib/kunit/test.c b/lib/kunit/test.c index 5679197b5f8a..692fce258c5b 100644 --- a/lib/kunit/test.c +++ b/lib/kunit/test.c @@ -154,8 +154,14 @@ static void kunit_print_suite_start(struct kunit_suite *suite) kunit_suite_num_test_cases(suite)); }
+enum kunit_test_or_suite {
KUNIT_SUITE = 0,KUNIT_TEST,KUNIT_SUBTEST,+};
As Rae notes, this probably won't be how this code eventually evolves. I don't think it's a problem to have it now, though.
static void kunit_print_ok_not_ok(void *test_or_suite,
bool is_test,
enum kunit_test_or_suite is_test, enum kunit_status status, size_t test_number, const char *description,@@ -180,7 +186,9 @@ static void kunit_print_ok_not_ok(void *test_or_suite, (status == KUNIT_SKIPPED) ? directive : ""); else kunit_log(KERN_INFO, test,
KUNIT_SUBTEST_INDENT "%s %zd %s%s%s",
"%.*s%s %zd %s%s%s",(int) strlen(KUNIT_SUBTEST_INDENT) * is_test,KUNIT_SUBTEST_INDENT KUNIT_SUBTEST_INDENT,
This feels a little bit _too_ clever here: I feel it at the very least needs a comment, and maybe it'd make more sense to either: - Make is_test explicitly a "nesting depth" integer, and calculate the indent based on that. - Have is_test as an enum, and then just explicitly handle each value separately. (Like we do with suite vs test).
I think that the former is probably the right long-term solution (it's much more extensible to more levels of nesting), but the latter is definitely easier given the differences between suites and tests at the moment.
If we do continue to share a codepath between tests and subtests, I'd prefer it if we either didn't use strlen(), or went to some greater effort to document how that works (hopefully we can guarantee that the compiler will treat this as a constant). Equally, a comment or something noting that this will read invalid memory if is_test > 2, due to the hardcoded two KUNIT_SUBTEST_INDENT, would be nice.
kunit_status_to_ok_not_ok(status), test_number, description, directive_header, (status == KUNIT_SKIPPED) ? directive : "");@@ -209,7 +217,7 @@ static size_t kunit_suite_counter = 1;
static void kunit_print_suite_end(struct kunit_suite *suite) {
kunit_print_ok_not_ok((void *)suite, false,
kunit_print_ok_not_ok((void *)suite, KUNIT_SUITE, kunit_suite_has_succeeded(suite), kunit_suite_counter++, suite->name,@@ -554,13 +562,11 @@ int kunit_run_tests(struct kunit_suite *suite) "param-%d", test.param_index); }
kunit_log(KERN_INFO, &test,KUNIT_SUBTEST_INDENT KUNIT_SUBTEST_INDENT"%s %d %s%s%s",kunit_status_to_ok_not_ok(test.status),test.param_index + 1, param_desc,test.status == KUNIT_SKIPPED ? " # SKIP " : "",test.status == KUNIT_SKIPPED ? test.status_comment : "");
kunit_print_ok_not_ok(&test, KUNIT_SUBTEST,test.status,test.param_index + 1,param_desc,test.status_comment); /* Get next param. */ param_desc[0] = '\0';@@ -574,7 +580,7 @@ int kunit_run_tests(struct kunit_suite *suite)
kunit_print_test_stats(&test, param_stats);
kunit_print_ok_not_ok(&test, true, test_case->status,
kunit_print_ok_not_ok(&test, KUNIT_TEST, test_case->status, kunit_test_case_num(suite, test_case), test_case->name, test.status_comment);-- 2.25.1
Otherwise, this all looks good to me. Thanks very much!
Cheers, -- David
On 13.04.2023 08:38, David Gow wrote:
On Wed, 12 Apr 2023 at 00:01, Michal Wajdeczko michal.wajdeczko@intel.com wrote:
There is function to report status of either suite or test, but it doesn't support parameterized subtests that have to log report on its own. Extend it to also accept subtest level results to avoid code duplication.
Signed-off-by: Michal Wajdeczko michal.wajdeczko@intel.com Cc: David Gow davidgow@google.com
Thanks: this is definitely an improvement on how we handle this.
There's definitely more we can do, particularly looking forward to supporting more complex test hierarchies in the future, but getting everything under kunit_print_ok_not_ok is an improvement regardless of when happens down the line.
My only real concern is that the way the indent is printed is a bit subtle and difficult to understand fully on first glance. I've added some notes below.
lib/kunit/test.c | 28 +++++++++++++++++----------- 1 file changed, 17 insertions(+), 11 deletions(-)
diff --git a/lib/kunit/test.c b/lib/kunit/test.c index 5679197b5f8a..692fce258c5b 100644 --- a/lib/kunit/test.c +++ b/lib/kunit/test.c @@ -154,8 +154,14 @@ static void kunit_print_suite_start(struct kunit_suite *suite) kunit_suite_num_test_cases(suite)); }
+enum kunit_test_or_suite {
KUNIT_SUITE = 0,KUNIT_TEST,KUNIT_SUBTEST,+};
As Rae notes, this probably won't be how this code eventually evolves. I don't think it's a problem to have it now, though.
static void kunit_print_ok_not_ok(void *test_or_suite,
bool is_test,
enum kunit_test_or_suite is_test, enum kunit_status status, size_t test_number, const char *description,@@ -180,7 +186,9 @@ static void kunit_print_ok_not_ok(void *test_or_suite, (status == KUNIT_SKIPPED) ? directive : ""); else kunit_log(KERN_INFO, test,
KUNIT_SUBTEST_INDENT "%s %zd %s%s%s",
"%.*s%s %zd %s%s%s",(int) strlen(KUNIT_SUBTEST_INDENT) * is_test,KUNIT_SUBTEST_INDENT KUNIT_SUBTEST_INDENT,This feels a little bit _too_ clever here: I feel it at the very least needs a comment, and maybe it'd make more sense to either:
- Make is_test explicitly a "nesting depth" integer, and calculate the
indent based on that.
- Have is_test as an enum, and then just explicitly handle each value
separately. (Like we do with suite vs test).
I think that the former is probably the right long-term solution (it's much more extensible to more levels of nesting), but the latter is definitely easier given the differences between suites and tests at the moment.
If we do continue to share a codepath between tests and subtests, I'd prefer it if we either didn't use strlen(), or went to some greater
Rae suggested to define KUNIT_INDENT_LEN 4 and I will put it in test.h
effort to document how that works (hopefully we can guarantee that the compiler will treat this as a constant). Equally, a comment or something noting that this will read invalid memory if is_test > 2, due to the hardcoded two KUNIT_SUBTEST_INDENT, would be nice.
that shouldn't happen as %.*s specifies precision and it's used here to clamp string with more than needed indents, it will not try to read beyond terminating \0
but since you plan for arbitrary level of testing I could change that to a little simpler variant %*s which should always with any level:
kunit_log(KERN_INFO, test, "%*s%s %zd %s%s%s", KUNIT_INDENT_LEN * test_level, "",
will that be _simple_ enough ?
Thanks, Michal
kunit_status_to_ok_not_ok(status), test_number, description, directive_header, (status == KUNIT_SKIPPED) ? directive : "");@@ -209,7 +217,7 @@ static size_t kunit_suite_counter = 1;
static void kunit_print_suite_end(struct kunit_suite *suite) {
kunit_print_ok_not_ok((void *)suite, false,
kunit_print_ok_not_ok((void *)suite, KUNIT_SUITE, kunit_suite_has_succeeded(suite), kunit_suite_counter++, suite->name,@@ -554,13 +562,11 @@ int kunit_run_tests(struct kunit_suite *suite) "param-%d", test.param_index); }
kunit_log(KERN_INFO, &test,KUNIT_SUBTEST_INDENT KUNIT_SUBTEST_INDENT"%s %d %s%s%s",kunit_status_to_ok_not_ok(test.status),test.param_index + 1, param_desc,test.status == KUNIT_SKIPPED ? " # SKIP " : "",test.status == KUNIT_SKIPPED ? test.status_comment : "");
kunit_print_ok_not_ok(&test, KUNIT_SUBTEST,test.status,test.param_index + 1,param_desc,test.status_comment); /* Get next param. */ param_desc[0] = '\0';@@ -574,7 +580,7 @@ int kunit_run_tests(struct kunit_suite *suite)
kunit_print_test_stats(&test, param_stats);
kunit_print_ok_not_ok(&test, true, test_case->status,
kunit_print_ok_not_ok(&test, KUNIT_TEST, test_case->status, kunit_test_case_num(suite, test_case), test_case->name, test.status_comment);-- 2.25.1
Otherwise, this all looks good to me. Thanks very much!
Cheers, -- David
linux-kselftest-mirror@lists.linaro.org
-
David Gow -
Michal Wajdeczko -
Rae Moar