[PATCH v2 4/4] t/unit-tests: convert strcmp-offset test to use clar test framework

[Seyi Kuforiji <kuforiji98@xxxxxxxxx>]

Adapt strcmp-offset test script to clar framework by using clar
assertions where necessary. Introduce `test_strcmp_offset__empty()` to
verify `check_strcmp_offset()` behavior when both input strings are
empty. This ensures the function correctly handles edge cases and
returns expected values.

Mentored-by: Patrick Steinhardt <ps@xxxxxx>
Signed-off-by: Seyi Kuforiji <kuforiji98@xxxxxxxxx>
---
 Makefile                                      |  2 +-
 t/meson.build                                 |  2 +-
 .../{t-strcmp-offset.c => u-strcmp-offset.c}  | 36 ++++++++++++-------
 3 files changed, 25 insertions(+), 15 deletions(-)
 rename t/unit-tests/{t-strcmp-offset.c => u-strcmp-offset.c} (39%)

diff --git a/Makefile b/Makefile
index 358193597f..76b5de4fdd 100644
--- a/Makefile
+++ b/Makefile
@@ -1345,6 +1345,7 @@ CLAR_TEST_SUITES += u-mem-pool
 CLAR_TEST_SUITES += u-prio-queue
 CLAR_TEST_SUITES += u-reftable-tree
 CLAR_TEST_SUITES += u-strbuf
+CLAR_TEST_SUITES += u-strcmp-offset
 CLAR_TEST_SUITES += u-strvec
 CLAR_TEST_PROG = $(UNIT_TEST_BIN)/unit-tests$(X)
 CLAR_TEST_OBJS = $(patsubst %,$(UNIT_TEST_DIR)/%.o,$(CLAR_TEST_SUITES))
@@ -1362,7 +1363,6 @@ UNIT_TEST_PROGRAMS += t-reftable-reader
 UNIT_TEST_PROGRAMS += t-reftable-readwrite
 UNIT_TEST_PROGRAMS += t-reftable-record
 UNIT_TEST_PROGRAMS += t-reftable-stack
-UNIT_TEST_PROGRAMS += t-strcmp-offset
 UNIT_TEST_PROGRAMS += t-trailer
 UNIT_TEST_PROGRAMS += t-urlmatch-normalization
 UNIT_TEST_PROGS = $(patsubst %,$(UNIT_TEST_BIN)/%$X,$(UNIT_TEST_PROGRAMS))
diff --git a/t/meson.build b/t/meson.build
index 6cb72842b1..3935782bbb 100644
--- a/t/meson.build
+++ b/t/meson.build
@@ -7,6 +7,7 @@ clar_test_suites = [
   'unit-tests/u-prio-queue.c',
   'unit-tests/u-reftable-tree.c',
   'unit-tests/u-strbuf.c',
+  'unit-tests/u-strcmp-offset.c',
   'unit-tests/u-strvec.c',
 ]
 
@@ -58,7 +59,6 @@ unit_test_programs = [
   'unit-tests/t-reftable-readwrite.c',
   'unit-tests/t-reftable-record.c',
   'unit-tests/t-reftable-stack.c',
-  'unit-tests/t-strcmp-offset.c',
   'unit-tests/t-trailer.c',
   'unit-tests/t-urlmatch-normalization.c',
 ]
diff --git a/t/unit-tests/t-strcmp-offset.c b/t/unit-tests/u-strcmp-offset.c
similarity index 39%
rename from t/unit-tests/t-strcmp-offset.c
rename to t/unit-tests/u-strcmp-offset.c
index 6880f21161..7e8e9acf3c 100644
--- a/t/unit-tests/t-strcmp-offset.c
+++ b/t/unit-tests/u-strcmp-offset.c
@@ -1,4 +1,4 @@
-#include "test-lib.h"
+#include "unit-test.h"
 #include "read-cache-ll.h"
 
 static void check_strcmp_offset(const char *string1, const char *string2,
@@ -15,21 +15,31 @@ static void check_strcmp_offset(const char *string1, const char *string2,
 			result > 0 ? 1 :
 			0);
 
-	check_int(result, ==, expect_result);
-	check_uint((uintmax_t)offset, ==, expect_offset);
+	cl_assert_equal_i(result, expect_result);
+	cl_assert_equal_i((uintmax_t)offset, expect_offset);
 }
 
-#define TEST_STRCMP_OFFSET(string1, string2, expect_result, expect_offset) \
-	TEST(check_strcmp_offset(string1, string2, expect_result,          \
-				 expect_offset),                           \
-	     "strcmp_offset(%s, %s) works", #string1, #string2)
+void test_strcmp_offset__empty(void)
+{
+	check_strcmp_offset("", "", 0, 0);
+}
+
+void test_strcmp_offset__equal(void)
+{
+	check_strcmp_offset("abc", "abc", 0, 3);
+}
 
-int cmd_main(int argc UNUSED, const char **argv UNUSED)
+void test_strcmp_offset__different(void)
 {
-	TEST_STRCMP_OFFSET("abc", "abc", 0, 3);
-	TEST_STRCMP_OFFSET("abc", "def", -1, 0);
-	TEST_STRCMP_OFFSET("abc", "abz", -1, 2);
-	TEST_STRCMP_OFFSET("abc", "abcdef", -1, 3);
+	check_strcmp_offset("abc", "def", -1, 0);
+}
 
-	return test_done();
+void test_strcmp_offset__mismatch(void)
+{
+	check_strcmp_offset("abc", "abz", -1, 2);
+}
+
+void test_strcmp_offset__different_length(void)
+{
+	check_strcmp_offset("abc", "abcdef", -1, 3);
 }
-- 
2.47.0.86.g15030f9556