Re: [PATCH v9 2/2] fs: ext4: Modify inode-test.c to use KUnit parameterized testing feature

From: Marco Elver
Date: Mon Nov 16 2020 - 03:51:34 EST

On Mon, 16 Nov 2020 at 06:42, Arpitha Raghunandan <98.arpi@xxxxxxxxx> wrote:
>
> Modify fs/ext4/inode-test.c to use the parameterized testing
> feature of KUnit.
>
> Signed-off-by: Arpitha Raghunandan <98.arpi@xxxxxxxxx>
> Signed-off-by: Marco Elver <elver@xxxxxxxxxx>

Reviewed-by: Marco Elver <elver@xxxxxxxxxx>

Thank you!

> ---
> Changes v8->v9:
> - Replace strncpy() with strscpy() in timestamp_expectation_to_desc()
> Changes v7->v8:
> - Replace strcpy() with strncpy() in timestamp_expectation_to_desc()
> Changes v6->v7:
> - Introduce timestamp_expectation_to_desc() to convert param to
> description.
> Changes v5->v6:
> - No change to this patch of the patch series
> Changes v4->v5:
> - No change to this patch of the patch series
> Changes v3->v4:
> - Modification based on latest implementation of KUnit parameterized testing
> Changes v2->v3:
> - Marked hardcoded test data const
> - Modification based on latest implementation of KUnit parameterized testing
> Changes v1->v2:
> - Modification based on latest implementation of KUnit parameterized testing
>
> fs/ext4/inode-test.c | 320 ++++++++++++++++++++++---------------------
> 1 file changed, 164 insertions(+), 156 deletions(-)
>
> diff --git a/fs/ext4/inode-test.c b/fs/ext4/inode-test.c
> index d62d802c9c12..7935ea6cf92c 100644
> --- a/fs/ext4/inode-test.c
> +++ b/fs/ext4/inode-test.c
> @@ -80,6 +80,145 @@ struct timestamp_expectation {
> bool lower_bound;
> };
>
> +static const struct timestamp_expectation test_data[] = {
> + {
> + .test_case_name = LOWER_BOUND_NEG_NO_EXTRA_BITS_CASE,
> + .msb_set = true,
> + .lower_bound = true,
> + .extra_bits = 0,
> + .expected = {.tv_sec = -0x80000000LL, .tv_nsec = 0L},
> + },
> +
> + {
> + .test_case_name = UPPER_BOUND_NEG_NO_EXTRA_BITS_CASE,
> + .msb_set = true,
> + .lower_bound = false,
> + .extra_bits = 0,
> + .expected = {.tv_sec = -1LL, .tv_nsec = 0L},
> + },
> +
> + {
> + .test_case_name = LOWER_BOUND_NONNEG_NO_EXTRA_BITS_CASE,
> + .msb_set = false,
> + .lower_bound = true,
> + .extra_bits = 0,
> + .expected = {0LL, 0L},
> + },
> +
> + {
> + .test_case_name = UPPER_BOUND_NONNEG_NO_EXTRA_BITS_CASE,
> + .msb_set = false,
> + .lower_bound = false,
> + .extra_bits = 0,
> + .expected = {.tv_sec = 0x7fffffffLL, .tv_nsec = 0L},
> + },
> +
> + {
> + .test_case_name = LOWER_BOUND_NEG_LO_1_CASE,
> + .msb_set = true,
> + .lower_bound = true,
> + .extra_bits = 1,
> + .expected = {.tv_sec = 0x80000000LL, .tv_nsec = 0L},
> + },
> +
> + {
> + .test_case_name = UPPER_BOUND_NEG_LO_1_CASE,
> + .msb_set = true,
> + .lower_bound = false,
> + .extra_bits = 1,
> + .expected = {.tv_sec = 0xffffffffLL, .tv_nsec = 0L},
> + },
> +
> + {
> + .test_case_name = LOWER_BOUND_NONNEG_LO_1_CASE,
> + .msb_set = false,
> + .lower_bound = true,
> + .extra_bits = 1,
> + .expected = {.tv_sec = 0x100000000LL, .tv_nsec = 0L},
> + },
> +
> + {
> + .test_case_name = UPPER_BOUND_NONNEG_LO_1_CASE,
> + .msb_set = false,
> + .lower_bound = false,
> + .extra_bits = 1,
> + .expected = {.tv_sec = 0x17fffffffLL, .tv_nsec = 0L},
> + },
> +
> + {
> + .test_case_name = LOWER_BOUND_NEG_HI_1_CASE,
> + .msb_set = true,
> + .lower_bound = true,
> + .extra_bits = 2,
> + .expected = {.tv_sec = 0x180000000LL, .tv_nsec = 0L},
> + },
> +
> + {
> + .test_case_name = UPPER_BOUND_NEG_HI_1_CASE,
> + .msb_set = true,
> + .lower_bound = false,
> + .extra_bits = 2,
> + .expected = {.tv_sec = 0x1ffffffffLL, .tv_nsec = 0L},
> + },
> +
> + {
> + .test_case_name = LOWER_BOUND_NONNEG_HI_1_CASE,
> + .msb_set = false,
> + .lower_bound = true,
> + .extra_bits = 2,
> + .expected = {.tv_sec = 0x200000000LL, .tv_nsec = 0L},
> + },
> +
> + {
> + .test_case_name = UPPER_BOUND_NONNEG_HI_1_CASE,
> + .msb_set = false,
> + .lower_bound = false,
> + .extra_bits = 2,
> + .expected = {.tv_sec = 0x27fffffffLL, .tv_nsec = 0L},
> + },
> +
> + {
> + .test_case_name = UPPER_BOUND_NONNEG_HI_1_NS_1_CASE,
> + .msb_set = false,
> + .lower_bound = false,
> + .extra_bits = 6,
> + .expected = {.tv_sec = 0x27fffffffLL, .tv_nsec = 1L},
> + },
> +
> + {
> + .test_case_name = LOWER_BOUND_NONNEG_HI_1_NS_MAX_CASE,
> + .msb_set = false,
> + .lower_bound = true,
> + .extra_bits = 0xFFFFFFFF,
> + .expected = {.tv_sec = 0x300000000LL,
> + .tv_nsec = MAX_NANOSECONDS},
> + },
> +
> + {
> + .test_case_name = LOWER_BOUND_NONNEG_EXTRA_BITS_1_CASE,
> + .msb_set = false,
> + .lower_bound = true,
> + .extra_bits = 3,
> + .expected = {.tv_sec = 0x300000000LL, .tv_nsec = 0L},
> + },
> +
> + {
> + .test_case_name = UPPER_BOUND_NONNEG_EXTRA_BITS_1_CASE,
> + .msb_set = false,
> + .lower_bound = false,
> + .extra_bits = 3,
> + .expected = {.tv_sec = 0x37fffffffLL, .tv_nsec = 0L},
> + }
> +};
> +
> +static void timestamp_expectation_to_desc(const struct timestamp_expectation *t,
> + char *desc)
> +{
> + strscpy(desc, t->test_case_name, KUNIT_PARAM_DESC_SIZE);
> +}
> +
> +KUNIT_ARRAY_PARAM(ext4_inode, test_data, timestamp_expectation_to_desc);
> +
> static time64_t get_32bit_time(const struct timestamp_expectation * const test)
> {
> if (test->msb_set) {
> @@ -101,166 +240,35 @@ static time64_t get_32bit_time(const struct timestamp_expectation * const test)
> */
> static void inode_test_xtimestamp_decoding(struct kunit *test)
> {
> - const struct timestamp_expectation test_data[] = {
> - {
> - .test_case_name = LOWER_BOUND_NEG_NO_EXTRA_BITS_CASE,
> - .msb_set = true,
> - .lower_bound = true,
> - .extra_bits = 0,
> - .expected = {.tv_sec = -0x80000000LL, .tv_nsec = 0L},
> - },
> -
> - {
> - .test_case_name = UPPER_BOUND_NEG_NO_EXTRA_BITS_CASE,
> - .msb_set = true,
> - .lower_bound = false,
> - .extra_bits = 0,
> - .expected = {.tv_sec = -1LL, .tv_nsec = 0L},
> - },
> -
> - {
> - .test_case_name = LOWER_BOUND_NONNEG_NO_EXTRA_BITS_CASE,
> - .msb_set = false,
> - .lower_bound = true,
> - .extra_bits = 0,
> - .expected = {0LL, 0L},
> - },
> -
> - {
> - .test_case_name = UPPER_BOUND_NONNEG_NO_EXTRA_BITS_CASE,
> - .msb_set = false,
> - .lower_bound = false,
> - .extra_bits = 0,
> - .expected = {.tv_sec = 0x7fffffffLL, .tv_nsec = 0L},
> - },
> -
> - {
> - .test_case_name = LOWER_BOUND_NEG_LO_1_CASE,
> - .msb_set = true,
> - .lower_bound = true,
> - .extra_bits = 1,
> - .expected = {.tv_sec = 0x80000000LL, .tv_nsec = 0L},
> - },
> -
> - {
> - .test_case_name = UPPER_BOUND_NEG_LO_1_CASE,
> - .msb_set = true,
> - .lower_bound = false,
> - .extra_bits = 1,
> - .expected = {.tv_sec = 0xffffffffLL, .tv_nsec = 0L},
> - },
> -
> - {
> - .test_case_name = LOWER_BOUND_NONNEG_LO_1_CASE,
> - .msb_set = false,
> - .lower_bound = true,
> - .extra_bits = 1,
> - .expected = {.tv_sec = 0x100000000LL, .tv_nsec = 0L},
> - },
> -
> - {
> - .test_case_name = UPPER_BOUND_NONNEG_LO_1_CASE,
> - .msb_set = false,
> - .lower_bound = false,
> - .extra_bits = 1,
> - .expected = {.tv_sec = 0x17fffffffLL, .tv_nsec = 0L},
> - },
> -
> - {
> - .test_case_name = LOWER_BOUND_NEG_HI_1_CASE,
> - .msb_set = true,
> - .lower_bound = true,
> - .extra_bits = 2,
> - .expected = {.tv_sec = 0x180000000LL, .tv_nsec = 0L},
> - },
> -
> - {
> - .test_case_name = UPPER_BOUND_NEG_HI_1_CASE,
> - .msb_set = true,
> - .lower_bound = false,
> - .extra_bits = 2,
> - .expected = {.tv_sec = 0x1ffffffffLL, .tv_nsec = 0L},
> - },
> -
> - {
> - .test_case_name = LOWER_BOUND_NONNEG_HI_1_CASE,
> - .msb_set = false,
> - .lower_bound = true,
> - .extra_bits = 2,
> - .expected = {.tv_sec = 0x200000000LL, .tv_nsec = 0L},
> - },
> -
> - {
> - .test_case_name = UPPER_BOUND_NONNEG_HI_1_CASE,
> - .msb_set = false,
> - .lower_bound = false,
> - .extra_bits = 2,
> - .expected = {.tv_sec = 0x27fffffffLL, .tv_nsec = 0L},
> - },
> -
> - {
> - .test_case_name = UPPER_BOUND_NONNEG_HI_1_NS_1_CASE,
> - .msb_set = false,
> - .lower_bound = false,
> - .extra_bits = 6,
> - .expected = {.tv_sec = 0x27fffffffLL, .tv_nsec = 1L},
> - },
> -
> - {
> - .test_case_name = LOWER_BOUND_NONNEG_HI_1_NS_MAX_CASE,
> - .msb_set = false,
> - .lower_bound = true,
> - .extra_bits = 0xFFFFFFFF,
> - .expected = {.tv_sec = 0x300000000LL,
> - .tv_nsec = MAX_NANOSECONDS},
> - },
> -
> - {
> - .test_case_name = LOWER_BOUND_NONNEG_EXTRA_BITS_1_CASE,
> - .msb_set = false,
> - .lower_bound = true,
> - .extra_bits = 3,
> - .expected = {.tv_sec = 0x300000000LL, .tv_nsec = 0L},
> - },
> -
> - {
> - .test_case_name = UPPER_BOUND_NONNEG_EXTRA_BITS_1_CASE,
> - .msb_set = false,
> - .lower_bound = false,
> - .extra_bits = 3,
> - .expected = {.tv_sec = 0x37fffffffLL, .tv_nsec = 0L},
> - }
> - };
> -
> struct timespec64 timestamp;
> - int i;
> -
> - for (i = 0; i < ARRAY_SIZE(test_data); ++i) {
> - timestamp.tv_sec = get_32bit_time(&test_data[i]);
> - ext4_decode_extra_time(&timestamp,
> - cpu_to_le32(test_data[i].extra_bits));
> -
> - KUNIT_EXPECT_EQ_MSG(test,
> - test_data[i].expected.tv_sec,
> - timestamp.tv_sec,
> - CASE_NAME_FORMAT,
> - test_data[i].test_case_name,
> - test_data[i].msb_set,
> - test_data[i].lower_bound,
> - test_data[i].extra_bits);
> - KUNIT_EXPECT_EQ_MSG(test,
> - test_data[i].expected.tv_nsec,
> - timestamp.tv_nsec,
> - CASE_NAME_FORMAT,
> - test_data[i].test_case_name,
> - test_data[i].msb_set,
> - test_data[i].lower_bound,
> - test_data[i].extra_bits);
> - }
> +
> + struct timestamp_expectation *test_param =
> + (struct timestamp_expectation *)(test->param_value);
> +
> + timestamp.tv_sec = get_32bit_time(test_param);
> + ext4_decode_extra_time(&timestamp,
> + cpu_to_le32(test_param->extra_bits));
> +
> + KUNIT_EXPECT_EQ_MSG(test,
> + test_param->expected.tv_sec,
> + timestamp.tv_sec,
> + CASE_NAME_FORMAT,
> + test_param->test_case_name,
> + test_param->msb_set,
> + test_param->lower_bound,
> + test_param->extra_bits);
> + KUNIT_EXPECT_EQ_MSG(test,
> + test_param->expected.tv_nsec,
> + timestamp.tv_nsec,
> + CASE_NAME_FORMAT,
> + test_param->test_case_name,
> + test_param->msb_set,
> + test_param->lower_bound,
> + test_param->extra_bits);
> }
>
> static struct kunit_case ext4_inode_test_cases[] = {
> - KUNIT_CASE(inode_test_xtimestamp_decoding),
> + KUNIT_CASE_PARAM(inode_test_xtimestamp_decoding, ext4_inode_gen_params),
> {}
> };
>
> --
> 2.25.1
>