lib/test_bits.c: add tests of GENMASK (6d511020) · Commits · 戴 / test

lib/Kconfig.debug

+11 −0

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		@@ -2236,6 +2236,17 @@ config LINEAR_RANGES_TEST

		If unsure, say N.

		config BITS_TEST
		tristate "KUnit test for bits.h"
		depends on KUNIT
		help
		This builds the bits unit test.
		Tests the logic of macros defined in bits.h.
		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 TEST_UDELAY
		tristate "udelay test driver"
		help

lib/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -342,3 +342,4 @@ obj-$(CONFIG_PLDMFW) += pldmfw/
		# KUnit tests
		obj-$(CONFIG_LIST_KUNIT_TEST) += list-test.o
		obj-$(CONFIG_LINEAR_RANGES_TEST) += test_linear_ranges.o
		obj-$(CONFIG_BITS_TEST) += test_bits.o

lib/test_bits.c

0 → 100644

+75 −0

Original line number	Diff line number	Diff line
		// SPDX-License-Identifier: GPL-2.0+
		/*
		* Test cases for functions and macros in bits.h
		*/

		#include <kunit/test.h>
		#include <linux/bits.h>


		static void genmask_test(struct kunit *test)
		{
		KUNIT_EXPECT_EQ(test, 1ul, GENMASK(0, 0));
		KUNIT_EXPECT_EQ(test, 3ul, GENMASK(1, 0));
		KUNIT_EXPECT_EQ(test, 6ul, GENMASK(2, 1));
		KUNIT_EXPECT_EQ(test, 0xFFFFFFFFul, GENMASK(31, 0));

		#ifdef TEST_GENMASK_FAILURES
		/* these should fail compilation */
		GENMASK(0, 1);
		GENMASK(0, 10);
		GENMASK(9, 10);
		#endif


		}

		static void genmask_ull_test(struct kunit *test)
		{
		KUNIT_EXPECT_EQ(test, 1ull, GENMASK_ULL(0, 0));
		KUNIT_EXPECT_EQ(test, 3ull, GENMASK_ULL(1, 0));
		KUNIT_EXPECT_EQ(test, 0x000000ffffe00000ull, GENMASK_ULL(39, 21));
		KUNIT_EXPECT_EQ(test, 0xffffffffffffffffull, GENMASK_ULL(63, 0));

		#ifdef TEST_GENMASK_FAILURES
		/* these should fail compilation */
		GENMASK_ULL(0, 1);
		GENMASK_ULL(0, 10);
		GENMASK_ULL(9, 10);
		#endif
		}

		static void genmask_input_check_test(struct kunit *test)
		{
		unsigned int x, y;
		int z, w;

		/* Unknown input */
		KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(x, 0));
		KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(0, x));
		KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(x, y));

		KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(z, 0));
		KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(0, z));
		KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(z, w));

		/* Valid input */
		KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(1, 1));
		KUNIT_EXPECT_EQ(test, 0, GENMASK_INPUT_CHECK(39, 21));
		}


		static struct kunit_case bits_test_cases[] = {
		KUNIT_CASE(genmask_test),
		KUNIT_CASE(genmask_ull_test),
		KUNIT_CASE(genmask_input_check_test),
		{}
		};

		static struct kunit_suite bits_test_suite = {
		.name = "bits-test",
		.test_cases = bits_test_cases,
		};
		kunit_test_suite(bits_test_suite);

		MODULE_LICENSE("GPL");

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