The patch titled
Subject: lib/cmdline_kunit: add a new test suite for cmdline API
has been added to the -mm tree. Its filename is
lib-cmdline_kunit-add-a-new-test-suite-for-cmdline-api.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/lib-cmdline_kunit-add-a-new-test-suite-for-cmdline-api.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/lib-cmdline_kunit-add-a-new-test-suite-for-cmdline-api.patch
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------------------------------------------------------
From: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Subject: lib/cmdline_kunit: add a new test suite for cmdline API
Test get_option() for a starter which is provided by cmdline.c.
Link: https://lkml.kernel.org/r/20201112180732.75589-6-andriy.shevchenko@xxxxxxxxxxxxxxx
Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Cc: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx>
Cc: Vitor Massaru Iha <vitor@xxxxxxxxxxx>
Cc: Mark Brown <broonie@xxxxxxxxxx>
Cc: Brendan Higgins <brendanhiggins@xxxxxxxxxx>
Cc: David Gow <davidgow@xxxxxxxxxx>
Cc: Matti Vaittinen <matti.vaittinen@xxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
lib/Kconfig.debug | 11 ++++
lib/Makefile | 1
lib/cmdline_kunit.c | 98 ++++++++++++++++++++++++++++++++++++++++++
3 files changed, 110 insertions(+)
--- /dev/null
+++ a/lib/cmdline_kunit.c
@@ -0,0 +1,98 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Test cases for API provided by cmdline.c
+ */
+
+#include <kunit/test.h>
+#include <linux/kernel.h>
+#include <linux/random.h>
+#include <linux/string.h>
+
+static const char *cmdline_test_strings[] = {
+ "\"\"", "" , "=" , "\"-", "," , "-," , ",-" , "-" ,
+ "+," , "--", ",,", "''" , "\"\",", "\",\"", "-\"\"", "\"",
+};
+
+static const char *cmdline_test_values[] = {
+ 1, 1, 1, 1, 2, 3, 2, 3,
+ 1, 3, 2, 1, 1, 1, 3, 1,
+};
+
+static void cmdline_do_one_test(struct kunit *test, char *in, int rc, int offset)
+{
+ const char *fmt = "Pattern: %s";
+ char *out = in;
+ int dummy;
+ int ret;
+
+ ret = get_option(&out, &dummy);
+
+ KUNIT_EXPECT_EQ_MSG(test, ret, rc, fmt, in);
+ KUNIT_EXPECT_PTR_EQ_MSG(test, out, in + offset, fmt, in);
+}
+
+static void cmdline_test_noint(struct kunit *test)
+{
+ unsigned int i = 0;
+
+ do {
+ const char *str = cmdline_test_strings[i];
+ int rc = 0;
+ int offset;
+
+ /* Only first and leading '-' will advance the pointer */
+ offset = !!(*str == '-');
+ cmdline_do_one_test(test, str, rc, offset);
+ } while (++i < ARRAY_SIZE(cmdline_test_strings));
+}
+
+static void cmdline_test_lead_int(struct kunit *test)
+{
+ unsigned int i = 0;
+ char in[32];
+
+ do {
+ const char *str = cmdline_test_strings[i];
+ int rc = cmdline_test_values[i];
+ int offset;
+
+ sprintf(in, "%u%s", get_random_int() % 256, str);
+ /* Only first '-' after the number will advance the pointer */
+ offset = strlen(in) - strlen(str) + !!(rc == 2);
+ cmdline_do_one_test(test, in, rc, offset);
+ } while (++i < ARRAY_SIZE(cmdline_test_strings));
+}
+
+static void cmdline_test_tail_int(struct kunit *test)
+{
+ unsigned int i = 0;
+ char in[32];
+
+ do {
+ const char *str = cmdline_test_strings[i];
+ /* When "" or "-" the result will be valid integer */
+ int rc = strcmp(str, "") ? (strcmp(str, "-") ? 0 : 1) : 1;
+ int offset;
+
+ sprintf(in, "%s%u", str, get_random_int() % 256);
+ /*
+ * Only first and leading '-' not followed by integer
+ * will advance the pointer.
+ */
+ offset = rc ? strlen(in) : !!(*str == '-');
+ cmdline_do_one_test(test, in, rc, offset);
+ } while (++i < ARRAY_SIZE(cmdline_test_strings));
+}
+
+static struct kunit_case cmdline_test_cases[] = {
+ KUNIT_CASE(cmdline_test_noint),
+ KUNIT_CASE(cmdline_test_lead_int),
+ KUNIT_CASE(cmdline_test_tail_int),
+ {}
+};
+
+static struct kunit_suite cmdline_test_suite = {
+ .name = "cmdline",
+ .test_cases = cmdline_test_cases,
+};
+kunit_test_suite(cmdline_test_suite);
--- a/lib/Kconfig.debug~lib-cmdline_kunit-add-a-new-test-suite-for-cmdline-api
+++ a/lib/Kconfig.debug
@@ -2276,6 +2276,17 @@ config LINEAR_RANGES_TEST
If unsure, say N.
+config CMDLINE_KUNIT_TEST
+ tristate "KUnit test for cmdline API"
+ depends on KUNIT
+ help
+ This builds the cmdline API unit test.
+ Tests the logic of API provided by cmdline.c.
+ For more information on KUnit and unit tests in general please refer
+ to the KUnit documentation in Documentation/dev-tools/kunit/.
+
+ If unsure, say N.
+
config BITS_TEST
tristate "KUnit test for bits.h"
depends on KUNIT
--- a/lib/Makefile~lib-cmdline_kunit-add-a-new-test-suite-for-cmdline-api
+++ a/lib/Makefile
@@ -350,5 +350,6 @@ obj-$(CONFIG_PLDMFW) += pldmfw/
# KUnit tests
obj-$(CONFIG_BITFIELD_KUNIT) += bitfield_kunit.o
obj-$(CONFIG_BITS_TEST) += bits_kunit.o
+obj-$(CONFIG_CMDLINE_KUNIT_TEST) += cmdline_kunit.o
obj-$(CONFIG_LINEAR_RANGES_TEST) += linear_ranges_kunit.o
obj-$(CONFIG_LIST_KUNIT_TEST) += list_kunit.o
_
Patches currently in -mm which might be from andriy.shevchenko@xxxxxxxxxxxxxxx are
kernelh-split-out-mathematical-helpers.patch
bitmap-convert-bitmap_empty-bitmap_full-to-return-boolean.patch
lib-list_kunit-follow-new-file-name-convention-for-kunit-tests.patch
lib-linear_ranges_kunit-follow-new-file-name-convention-for-kunit-tests.patch
lib-bits_kunit-follow-new-file-name-convention-for-kunit-tests.patch
lib-cmdline-fix-get_option-for-strings-starting-with-hyphen.patch
lib-cmdline-allow-null-to-be-an-output-for-get_option.patch
lib-cmdline_kunit-add-a-new-test-suite-for-cmdline-api.patch
