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

From: Arpitha Raghunandan
Date: Mon Nov 16 2020 - 00:46:01 EST

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>
---
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