[PATCH v2] lib: Convert test_hexdump.c to KUnit

9 Aug 2020

Converts test lib/test_hexdump.c to KUnit.
More information about KUnit can be found at
https://www.kernel.org/doc/html/latest/dev-tools/kunit/index.html.
KUnit provides a common framework for unit tests in the kernel.
Signed-off-by: Arpitha Raghunandan 98.arpi@gmail.com
---
Changes v1->v2:
- Replace KUNIT_EXPECT_EQ() with KUNIT_EXPECT_EQ_MSG()
- Replace KUNIT_EXPECT_NE() with KUNIT_EXPECT_NE_MSG()
- Prints expected and real buffer values in case of test failure
lib/Kconfig.debug                       |  7 +-
 lib/Makefile                            |  2 +-
 lib/{test_hexdump.c => hexdump_kunit.c} | 85 ++++++++++---------------
 3 files changed, 40 insertions(+), 54 deletions(-)
 rename lib/{test_hexdump.c => hexdump_kunit.c} (74%)

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index a164785c3b48..20efea177e02 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -2003,9 +2003,6 @@ config ASYNC_RAID6_TEST
If unsure, say N.
-config TEST_HEXDUMP
-	tristate "Test functions located in the hexdump module at runtime"
-
 config TEST_STRING_HELPERS
    tristate "Test functions located in the string_helpers module at runtime"
@@ -2224,6 +2221,10 @@ config LINEAR_RANGES_TEST
If unsure, say N.
+config HEXDUMP_KUNIT_TEST
+	tristate "KUnit test for functions located in the hexdump module at runtime"
+	depends on KUNIT
+
 config TEST_UDELAY
    tristate "udelay test driver"
    help
diff --git a/lib/Makefile b/lib/Makefile
index f39962104036..73ae79e36cc9 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -53,7 +53,6 @@ obj-$(CONFIG_STRING_SELFTEST) += test_string.o
 obj-y += string_helpers.o
 obj-$(CONFIG_TEST_STRING_HELPERS) += test-string_helpers.o
 obj-y += hexdump.o
-obj-$(CONFIG_TEST_HEXDUMP) += test_hexdump.o
 obj-y += kstrtox.o
 obj-$(CONFIG_FIND_BIT_BENCHMARK) += find_bit_benchmark.o
 obj-$(CONFIG_TEST_BPF) += test_bpf.o
@@ -345,3 +344,4 @@ obj-$(CONFIG_PLDMFW) += pldmfw/
 # KUnit tests
 obj-$(CONFIG_LIST_KUNIT_TEST) += list-test.o
 obj-$(CONFIG_LINEAR_RANGES_TEST) += test_linear_ranges.o
+obj-$(CONFIG_HEXDUMP_KUNIT_TEST) += hexdump_kunit.o
diff --git a/lib/test_hexdump.c b/lib/hexdump_kunit.c
similarity index 74%
rename from lib/test_hexdump.c
rename to lib/hexdump_kunit.c
index 5144899d3c6b..fea074b8c2e5 100644
--- a/lib/test_hexdump.c
+++ b/lib/hexdump_kunit.c
@@ -3,6 +3,7 @@
  */
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+#include <kunit/test.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
@@ -61,10 +62,7 @@ static const char * const test_data_8_be[] __initconst = {
#define FILL_CHAR	'#'
-static unsigned total_tests __initdata;
-static unsigned failed_tests __initdata;
-
-static void __init test_hexdump_prepare_test(size_t len, int rowsize,
+static void test_hexdump_prepare_test(size_t len, int rowsize,
    				     int groupsize, char *test,
    				     size_t testlen, bool ascii)
 {
@@ -122,14 +120,12 @@ static void __init test_hexdump_prepare_test(size_t len, int rowsize,
#define TEST_HEXDUMP_BUF_SIZE		(32 * 3 + 2 + 32 + 1)
-static void __init test_hexdump(size_t len, int rowsize, int groupsize,
-				bool ascii)
+static void test_hexdump(struct kunit *kunittest, size_t len, int rowsize,
+				int groupsize, bool ascii)
 {
    char test[TEST_HEXDUMP_BUF_SIZE];
    char real[TEST_HEXDUMP_BUF_SIZE];
-	total_tests++;
-
    memset(real, FILL_CHAR, sizeof(real));
    hex_dump_to_buffer(data_b, len, rowsize, groupsize, real, sizeof(real),
    		   ascii);
@@ -138,28 +134,25 @@ static void __init test_hexdump(size_t len, int rowsize, int groupsize,
    test_hexdump_prepare_test(len, rowsize, groupsize, test, sizeof(test),
    			  ascii);
-	if (memcmp(test, real, TEST_HEXDUMP_BUF_SIZE)) {
-		pr_err("Len: %zu row: %d group: %d\n", len, rowsize, groupsize);
-		pr_err("Result: '%s'\n", real);
-		pr_err("Expect: '%s'\n", test);
-		failed_tests++;
-	}
+	KUNIT_EXPECT_EQ_MSG(kunittest, 0, memcmp(test, real, TEST_HEXDUMP_BUF_SIZE),
+			"Len: %zu row: %d group: %d\nResult: '%s'\nExpect: '%s'\n",
+			len, rowsize, groupsize, real, test);
 }
-static void __init test_hexdump_set(int rowsize, bool ascii)
+static void test_hexdump_set(struct kunit *test, int rowsize, bool ascii)
 {
    size_t d = min_t(size_t, sizeof(data_b), rowsize);
    size_t len = get_random_int() % d + 1;
-	test_hexdump(len, rowsize, 4, ascii);
-	test_hexdump(len, rowsize, 2, ascii);
-	test_hexdump(len, rowsize, 8, ascii);
-	test_hexdump(len, rowsize, 1, ascii);
+	test_hexdump(test, len, rowsize, 4, ascii);
+	test_hexdump(test, len, rowsize, 2, ascii);
+	test_hexdump(test, len, rowsize, 8, ascii);
+	test_hexdump(test, len, rowsize, 1, ascii);
 }
-static void __init test_hexdump_overflow(size_t buflen, size_t len,
-					 int rowsize, int groupsize,
-					 bool ascii)
+static void test_hexdump_overflow(struct kunit *kunittest, size_t buflen,
+					size_t len, int rowsize,
+					int groupsize, bool ascii)
 {
    char test[TEST_HEXDUMP_BUF_SIZE];
    char buf[TEST_HEXDUMP_BUF_SIZE];
@@ -167,8 +160,6 @@ static void __init test_hexdump_overflow(size_t buflen, size_t len,
    int ae, he, e, f, r;
    bool a;
-	total_tests++;
-
    memset(buf, FILL_CHAR, sizeof(buf));
r = hex_dump_to_buffer(data_b, len, rs, gs, buf, buflen, ascii);
@@ -196,16 +187,12 @@ static void __init test_hexdump_overflow(size_t buflen, size_t len,
buf[sizeof(buf) - 1] = '\0';
-	if (!a) {
-		pr_err("Len: %zu buflen: %zu strlen: %zu\n",
-			len, buflen, strnlen(buf, sizeof(buf)));
-		pr_err("Result: %d '%s'\n", r, buf);
-		pr_err("Expect: %d '%s'\n", e, test);
-		failed_tests++;
-	}
+	KUNIT_EXPECT_NE_MSG(kunittest, 0, a,
+			"Len: %zu buflen: %zu strlen: %zu\nResult: %d '%s'\nExpect: %d '%s",
+			len, buflen, strnlen(buf, sizeof(buf)), r, buf, e, test);
 }
-static void __init test_hexdump_overflow_set(size_t buflen, bool ascii)
+static void test_hexdump_overflow_set(struct kunit *test, size_t buflen, bool ascii)
 {
    unsigned int i = 0;
    int rs = (get_random_int() % 2 + 1) * 16;
@@ -214,43 +201,41 @@ static void __init test_hexdump_overflow_set(size_t buflen, bool ascii)
    	int gs = 1 << i;
    	size_t len = get_random_int() % rs + gs;
-		test_hexdump_overflow(buflen, rounddown(len, gs), rs, gs, ascii);
+		test_hexdump_overflow(test, buflen, rounddown(len, gs), rs, gs, ascii);
    } while (i++ < 3);
 }
-static int __init test_hexdump_init(void)
+static void test_hexdump_init(struct kunit *test)
 {
    unsigned int i;
    int rowsize;
rowsize = (get_random_int() % 2 + 1) * 16;
    for (i = 0; i < 16; i++)
-		test_hexdump_set(rowsize, false);
+		test_hexdump_set(test, rowsize, false);
rowsize = (get_random_int() % 2 + 1) * 16;
    for (i = 0; i < 16; i++)
-		test_hexdump_set(rowsize, true);
+		test_hexdump_set(test, rowsize, true);
for (i = 0; i <= TEST_HEXDUMP_BUF_SIZE; i++)
-		test_hexdump_overflow_set(i, false);
+		test_hexdump_overflow_set(test, i, false);
for (i = 0; i <= TEST_HEXDUMP_BUF_SIZE; i++)
-		test_hexdump_overflow_set(i, true);
+		test_hexdump_overflow_set(test, i, true);
+}
-	if (failed_tests == 0)
-		pr_info("all %u tests passed\n", total_tests);
-	else
-		pr_err("failed %u out of %u tests\n", failed_tests, total_tests);
+static struct kunit_case hexdump_test_cases[] = {
+	KUNIT_CASE(test_hexdump_init),
+	{}
+};
-	return failed_tests ? -EINVAL : 0;
-}
-module_init(test_hexdump_init);
+static struct kunit_suite hexdump_test_suite = {
+	.name = "hexdump-kunit-test",
+	.test_cases = hexdump_test_cases,
+};
-static void __exit test_hexdump_exit(void)
-{
-	/* do nothing */
-}
-module_exit(test_hexdump_exit);
+kunit_test_suite(hexdump_test_suite);
MODULE_AUTHOR("Andy Shevchenko andriy.shevchenko@linux.intel.com");
 MODULE_LICENSE("Dual BSD/GPL");
-- 
2.25.1


    

2024

2023

2022

2021

2020

2019

2018

2017

[PATCH v2] lib: Convert test_hexdump.c to KUnit