[PATCH v3 2/4] t/unit-tests: convert oid-array test to use clar test framework

[Seyi Kuforiji <kuforiji98@gmail.com>]

Adapt oid-array test script to clar framework by using clar assertions
where necessary. Remove descriptions from macros to reduce
redundancy, and move test input arrays to global scope for reuse across
multiple test functions. Introduce `test_oid_array__initialize()` to
explicitly initialize the hash algorithm.

These changes streamline the test suite, making individual tests
self-contained and reducing redundant code.

Mentored-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Seyi Kuforiji <kuforiji98@gmail.com>
---
 Makefile                                      |   2 +-
 t/meson.build                                 |   2 +-
 t/unit-tests/{t-oid-array.c => u-oid-array.c} | 125 +++++++++---------
 3 files changed, 66 insertions(+), 63 deletions(-)
 rename t/unit-tests/{t-oid-array.c => u-oid-array.c} (34%)

diff --git a/Makefile b/Makefile
index 81799488f0..c9b0320fcb 100644
--- a/Makefile
+++ b/Makefile
@@ -1356,6 +1356,7 @@ CLAR_TEST_SUITES += u-example-decorate
 CLAR_TEST_SUITES += u-hash
 CLAR_TEST_SUITES += u-hashmap
 CLAR_TEST_SUITES += u-mem-pool
+CLAR_TEST_SUITES += u-oid-array
 CLAR_TEST_SUITES += u-prio-queue
 CLAR_TEST_SUITES += u-reftable-tree
 CLAR_TEST_SUITES += u-strbuf
@@ -1367,7 +1368,6 @@ CLAR_TEST_OBJS += $(UNIT_TEST_DIR)/clar/clar.o
 CLAR_TEST_OBJS += $(UNIT_TEST_DIR)/unit-test.o
 CLAR_TEST_OBJS += $(UNIT_TEST_DIR)/lib-oid.o
 
-UNIT_TEST_PROGRAMS += t-oid-array
 UNIT_TEST_PROGRAMS += t-oidmap
 UNIT_TEST_PROGRAMS += t-oidtree
 UNIT_TEST_PROGRAMS += t-reftable-basics
diff --git a/t/meson.build b/t/meson.build
index 862cf1cfd4..1b17a53acc 100644
--- a/t/meson.build
+++ b/t/meson.build
@@ -4,6 +4,7 @@ clar_test_suites = [
   'unit-tests/u-hash.c',
   'unit-tests/u-hashmap.c',
   'unit-tests/u-mem-pool.c',
+  'unit-tests/u-oid-array.c',
   'unit-tests/u-prio-queue.c',
   'unit-tests/u-reftable-tree.c',
   'unit-tests/u-strbuf.c',
@@ -49,7 +50,6 @@ clar_unit_tests = executable('unit-tests',
 test('unit-tests', clar_unit_tests)
 
 unit_test_programs = [
-  'unit-tests/t-oid-array.c',
   'unit-tests/t-oidmap.c',
   'unit-tests/t-oidtree.c',
   'unit-tests/t-reftable-basics.c',
diff --git a/t/unit-tests/t-oid-array.c b/t/unit-tests/u-oid-array.c
similarity index 34%
rename from t/unit-tests/t-oid-array.c
rename to t/unit-tests/u-oid-array.c
index 45b59a2a51..e48a433f21 100644
--- a/t/unit-tests/t-oid-array.c
+++ b/t/unit-tests/u-oid-array.c
@@ -1,22 +1,19 @@
 #define USE_THE_REPOSITORY_VARIABLE
 
-#include "test-lib.h"
+#include "unit-test.h"
 #include "lib-oid.h"
 #include "oid-array.h"
 #include "hex.h"
 
-static int fill_array(struct oid_array *array, const char *hexes[], size_t n)
+static void fill_array(struct oid_array *array, const char *hexes[], size_t n)
 {
 	for (size_t i = 0; i < n; i++) {
 		struct object_id oid;
 
-		if (!check_int(get_oid_arbitrary_hex(hexes[i], &oid), ==, 0))
-			return -1;
+		cl_parse_any_oid(hexes[i], &oid);
 		oid_array_append(array, &oid);
 	}
-	if (!check_uint(array->nr, ==, n))
-		return -1;
-	return 0;
+	cl_assert_equal_i(array->nr, n);
 }
 
 static int add_to_oid_array(const struct object_id *oid, void *data)
@@ -34,30 +31,22 @@ static void t_enumeration(const char **input_args, size_t input_sz,
 			 actual = OID_ARRAY_INIT;
 	size_t i;
 
-	if (fill_array(&input, input_args, input_sz))
-		return;
-	if (fill_array(&expect, expect_args, expect_sz))
-		return;
+	fill_array(&input, input_args, input_sz);
+	fill_array(&expect, expect_args, expect_sz);
 
 	oid_array_for_each_unique(&input, add_to_oid_array, &actual);
-	if (!check_uint(actual.nr, ==, expect.nr))
-		return;
-
-	for (i = 0; i < actual.nr; i++) {
-		if (!check(oideq(&actual.oid[i], &expect.oid[i])))
-			test_msg("expected: %s\n       got: %s\n     index: %" PRIuMAX,
-				 oid_to_hex(&expect.oid[i]), oid_to_hex(&actual.oid[i]),
-				 (uintmax_t)i);
-	}
+	cl_assert_equal_i(actual.nr, expect.nr);
+
+	for (i = 0; i < actual.nr; i++)
+		cl_assert(oideq(&actual.oid[i], &expect.oid[i]));
 
 	oid_array_clear(&actual);
 	oid_array_clear(&input);
 	oid_array_clear(&expect);
 }
 
-#define TEST_ENUMERATION(input, expect, desc)                                     \
-	TEST(t_enumeration(input, ARRAY_SIZE(input), expect, ARRAY_SIZE(expect)), \
-			   desc " works")
+#define TEST_ENUMERATION(input, expect)                                     \
+	t_enumeration(input, ARRAY_SIZE(input), expect, ARRAY_SIZE(expect));
 
 static void t_lookup(const char **input_hexes, size_t n, const char *query_hex,
 		     int lower_bound, int upper_bound)
@@ -66,61 +55,75 @@ static void t_lookup(const char **input_hexes, size_t n, const char *query_hex,
 	struct object_id oid_query;
 	int ret;
 
-	if (!check_int(get_oid_arbitrary_hex(query_hex, &oid_query), ==, 0))
-		return;
-	if (fill_array(&array, input_hexes, n))
-		return;
+	cl_parse_any_oid(query_hex, &oid_query);
+	fill_array(&array, input_hexes, n);
 	ret = oid_array_lookup(&array, &oid_query);
 
-	if (!check_int(ret, <=, upper_bound) ||
-	    !check_int(ret, >=, lower_bound))
-		test_msg("oid query for lookup: %s", oid_to_hex(&oid_query));
+	cl_assert(ret <= upper_bound);
+	cl_assert(ret >= lower_bound);
 
 	oid_array_clear(&array);
 }
 
-#define TEST_LOOKUP(input_hexes, query, lower_bound, upper_bound, desc) \
-	TEST(t_lookup(input_hexes, ARRAY_SIZE(input_hexes), query,      \
-		      lower_bound, upper_bound),                        \
-	     desc " works")
+#define TEST_LOOKUP(input_hexes, query, lower_bound, upper_bound) \
+	t_lookup(input_hexes, ARRAY_SIZE(input_hexes), query,      \
+		      lower_bound, upper_bound);
 
-static void setup(void)
+void test_oid_array__initialize(void)
 {
 	/* The hash algo is used by oid_array_lookup() internally */
-	int algo = init_hash_algo();
-	if (check_int(algo, !=, GIT_HASH_UNKNOWN))
-		repo_set_hash_algo(the_repository, algo);
+	int algo = cl_setup_hash_algo();
+	repo_set_hash_algo(the_repository, algo);
 }
 
-int cmd_main(int argc UNUSED, const char **argv UNUSED)
+static const char *arr_input[] = { "88", "44", "aa", "55" };
+static const char *arr_input_dup[] = { "88", "44", "aa", "55",
+				       "88", "44", "aa", "55",
+				       "88", "44", "aa", "55" };
+static const char *res_sorted[] = { "44", "55", "88", "aa" };
+
+void test_oid_array__enumerate_unique(void)
 {
-	const char *arr_input[] = { "88", "44", "aa", "55" };
-	const char *arr_input_dup[] = { "88", "44", "aa", "55",
-					"88", "44", "aa", "55",
-					"88", "44", "aa", "55" };
-	const char *res_sorted[] = { "44", "55", "88", "aa" };
-	const char *nearly_55;
+	TEST_ENUMERATION(arr_input, res_sorted);
+}
+
+void test_oid_array__enumerate_duplicate(void)
+{
+	TEST_ENUMERATION(arr_input_dup, res_sorted);
+}
+
+void test_oid_array__lookup(void)
+{
+	TEST_LOOKUP(arr_input, "55", 1, 1);
+}
 
-	if (!TEST(setup(), "setup"))
-		test_skip_all("hash algo initialization failed");
+void test_oid_array__lookup_non_existent(void)
+{
+	TEST_LOOKUP(arr_input, "33", INT_MIN, -1);
+}
+
+void test_oid_array__lookup_duplicates(void)
+{
+	TEST_LOOKUP(arr_input_dup, "55", 3, 5);
+}
 
-	TEST_ENUMERATION(arr_input, res_sorted, "ordered enumeration");
-	TEST_ENUMERATION(arr_input_dup, res_sorted,
-			 "ordered enumeration with duplicate suppression");
+void test_oid_array__lookup_non_existent_dup(void)
+{
+	TEST_LOOKUP(arr_input_dup, "66", INT_MIN, -1);
+}
 
-	TEST_LOOKUP(arr_input, "55", 1, 1, "lookup");
-	TEST_LOOKUP(arr_input, "33", INT_MIN, -1, "lookup non-existent entry");
-	TEST_LOOKUP(arr_input_dup, "55", 3, 5, "lookup with duplicates");
-	TEST_LOOKUP(arr_input_dup, "66", INT_MIN, -1,
-		    "lookup non-existent entry with duplicates");
+void test_oid_array__lookup_almost_dup(void)
+{
+	const char *nearly_55;
 
-	nearly_55 = init_hash_algo() == GIT_HASH_SHA1 ?
+	nearly_55 = cl_setup_hash_algo() == GIT_HASH_SHA1 ?
 			"5500000000000000000000000000000000000001" :
 			"5500000000000000000000000000000000000000000000000000000000000001";
-	TEST_LOOKUP(((const char *[]){ "55", nearly_55 }), "55", 0, 0,
-		    "lookup with almost duplicate values");
-	TEST_LOOKUP(((const char *[]){ "55", "55" }), "55", 0, 1,
-		    "lookup with single duplicate value");
 
-	return test_done();
+	TEST_LOOKUP(((const char *[]){ "55", nearly_55 }), "55", 0, 0);
+}
+
+void test_oid_array__lookup_single_dup(void)
+{
+	TEST_LOOKUP(((const char *[]){ "55", "55" }), "55", 0, 1);
 }
-- 
2.47.0.86.g15030f9556