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Message-ID: <20230724162834.1354164-3-rmoar@google.com>
Date: Mon, 24 Jul 2023 16:28:22 +0000
From: Rae Moar <rmoar@...gle.com>
To: shuah@...nel.org, davidgow@...gle.com, dlatypov@...gle.com,
brendan.higgins@...ux.dev
Cc: linux-kselftest@...r.kernel.org, kunit-dev@...glegroups.com,
linux-kernel@...r.kernel.org, keescook@...omium.org,
linux-hardening@...r.kernel.org, jstultz@...gle.com,
tglx@...utronix.de, sboyd@...nel.org, Rae Moar <rmoar@...gle.com>
Subject: [PATCH v2 2/9] kunit: Add speed attribute
Add speed attribute to the test attribute API. This attribute will allow
users to mark tests with a category of speed.
Currently the categories of speed proposed are: normal, slow, and very_slow
(outlined in enum kunit_speed). These are outlined in the enum kunit_speed.
The assumed default speed for tests is "normal". This indicates that the
test takes a relatively trivial amount of time (less than 1 second),
regardless of the machine it is running on. Any test slower than this could
be marked as "slow" or "very_slow".
Add the macro KUNIT_CASE_SLOW to set a test as slow, as this is likely a
common use of the attributes API.
Add an example of marking a slow test to kunit-example-test.c.
Reviewed-by: David Gow <davidgow@...gle.com>
Signed-off-by: Rae Moar <rmoar@...gle.com>
---
Changes since v1:
- Change kunit_attr_list definition to fix compile error.
Changes since RFC v2:
- Fixup comment.
Changes since RFC v1:
- Remove the "fast" category of speed.
include/kunit/test.h | 32 ++++++++++++++++++++++++-
lib/kunit/attributes.c | 44 +++++++++++++++++++++++++++++++++-
lib/kunit/kunit-example-test.c | 9 +++++++
3 files changed, 83 insertions(+), 2 deletions(-)
diff --git a/include/kunit/test.h b/include/kunit/test.h
index 1fc9155988e9..ed5f5000a095 100644
--- a/include/kunit/test.h
+++ b/include/kunit/test.h
@@ -63,8 +63,27 @@ enum kunit_status {
KUNIT_SKIPPED,
};
+/* Attribute struct/enum definitions */
+
+/*
+ * Speed Attribute is stored as an enum and separated into categories of
+ * speed: very_slowm, slow, and normal. These speeds are relative to
+ * other KUnit tests.
+ *
+ * Note: unset speed attribute acts as default of KUNIT_SPEED_NORMAL.
+ */
+enum kunit_speed {
+ KUNIT_SPEED_UNSET,
+ KUNIT_SPEED_VERY_SLOW,
+ KUNIT_SPEED_SLOW,
+ KUNIT_SPEED_NORMAL,
+ KUNIT_SPEED_MAX = KUNIT_SPEED_NORMAL,
+};
+
/* Holds attributes for each test case and suite */
-struct kunit_attributes {};
+struct kunit_attributes {
+ enum kunit_speed speed;
+};
/**
* struct kunit_case - represents an individual test case.
@@ -150,6 +169,17 @@ static inline char *kunit_status_to_ok_not_ok(enum kunit_status status)
{ .run_case = test_name, .name = #test_name, \
.attr = attributes }
+/**
+ * KUNIT_CASE_SLOW - A helper for creating a &struct kunit_case
+ * with the slow attribute
+ *
+ * @test_name: a reference to a test case function.
+ */
+
+#define KUNIT_CASE_SLOW(test_name) \
+ { .run_case = test_name, .name = #test_name, \
+ .attr.speed = KUNIT_SPEED_SLOW }
+
/**
* KUNIT_CASE_PARAM - A helper for creation a parameterized &struct kunit_case
*
diff --git a/lib/kunit/attributes.c b/lib/kunit/attributes.c
index 9bda5a5f4030..ffd0d692b334 100644
--- a/lib/kunit/attributes.c
+++ b/lib/kunit/attributes.c
@@ -40,9 +40,51 @@ struct kunit_attr {
enum print_ops print;
};
+/* String Lists for enum Attributes */
+
+static const char * const speed_str_list[] = {"unset", "very_slow", "slow", "normal"};
+
+/* To String Methods */
+
+static const char *attr_enum_to_string(void *attr, const char * const str_list[], bool *to_free)
+{
+ long val = (long)attr;
+
+ *to_free = false;
+ if (!val)
+ return NULL;
+ return str_list[val];
+}
+
+static const char *attr_speed_to_string(void *attr, bool *to_free)
+{
+ return attr_enum_to_string(attr, speed_str_list, to_free);
+}
+
+/* Get Attribute Methods */
+
+static void *attr_speed_get(void *test_or_suite, bool is_test)
+{
+ struct kunit_suite *suite = is_test ? NULL : test_or_suite;
+ struct kunit_case *test = is_test ? test_or_suite : NULL;
+
+ if (test)
+ return ((void *) test->attr.speed);
+ else
+ return ((void *) suite->attr.speed);
+}
+
/* List of all Test Attributes */
-static struct kunit_attr kunit_attr_list[] = {};
+static struct kunit_attr kunit_attr_list[] = {
+ {
+ .name = "speed",
+ .get_attr = attr_speed_get,
+ .to_string = attr_speed_to_string,
+ .attr_default = (void *)KUNIT_SPEED_NORMAL,
+ .print = PRINT_ALWAYS,
+ },
+};
/* Helper Functions to Access Attributes */
diff --git a/lib/kunit/kunit-example-test.c b/lib/kunit/kunit-example-test.c
index b69b689ea850..01a769f35e1d 100644
--- a/lib/kunit/kunit-example-test.c
+++ b/lib/kunit/kunit-example-test.c
@@ -220,6 +220,14 @@ static void example_params_test(struct kunit *test)
KUNIT_EXPECT_EQ(test, param->value % param->value, 0);
}
+/*
+ * This test should always pass. Can be used to practice filtering attributes.
+ */
+static void example_slow_test(struct kunit *test)
+{
+ KUNIT_EXPECT_EQ(test, 1 + 1, 2);
+}
+
/*
* Here we make a list of all the test cases we want to add to the test suite
* below.
@@ -237,6 +245,7 @@ static struct kunit_case example_test_cases[] = {
KUNIT_CASE(example_all_expect_macros_test),
KUNIT_CASE(example_static_stub_test),
KUNIT_CASE_PARAM(example_params_test, example_gen_params),
+ KUNIT_CASE_SLOW(example_slow_test),
{}
};
--
2.41.0.487.g6d72f3e995-goog
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