t-reftable-basics: use if_test

The macro TEST takes a single expression.  If a test requires multiple
statements then they need to be placed in a function that's called in
the TEST expression.

Remove the overhead of defining and calling single-use functions by
using if_test instead.

Run the tests in the order of definition.  We can reorder them like that
because they are independent.  Technically this changes the output, but
retains the meaning of a full run and allows for easier review e.g. with
diff option --ignore-all-space.

Signed-off-by: René Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Author: rscharfe

t/unit-tests/t-reftable-basics.c

@@ -20,141 +20,125 @@ static int integer_needle_lesseq(size_t i, void *_args)
 	return args->needle <= args->haystack[i];
 }
 
-static void test_binsearch(void)
+int cmd_main(int argc, const char *argv[])
 {
-	int haystack[] = { 2, 4, 6, 8, 10 };
-	struct {
-		int needle;
-		size_t expected_idx;
-	} testcases[] = {
-		{-9000, 0},
-		{-1, 0},
-		{0, 0},
-		{2, 0},
-		{3, 1},
-		{4, 1},
-		{7, 3},
-		{9, 4},
-		{10, 4},
-		{11, 5},
-		{9000, 5},
-	};
-
-	for (size_t i = 0; i < ARRAY_SIZE(testcases); i++) {
-		struct integer_needle_lesseq_args args = {
-			.haystack = haystack,
-			.needle = testcases[i].needle,
+	if_test ("binary search with binsearch works") {
+		int haystack[] = { 2, 4, 6, 8, 10 };
+		struct {
+			int needle;
+			size_t expected_idx;
+		} testcases[] = {
+			{-9000, 0},
+			{-1, 0},
+			{0, 0},
+			{2, 0},
+			{3, 1},
+			{4, 1},
+			{7, 3},
+			{9, 4},
+			{10, 4},
+			{11, 5},
+			{9000, 5},
 		};
-		size_t idx;
 
-		idx = binsearch(ARRAY_SIZE(haystack), &integer_needle_lesseq, &args);
-		check_int(idx, ==, testcases[i].expected_idx);
+		for (size_t i = 0; i < ARRAY_SIZE(testcases); i++) {
+			struct integer_needle_lesseq_args args = {
+				.haystack = haystack,
+				.needle = testcases[i].needle,
+			};
+			size_t idx;
+
+			idx = binsearch(ARRAY_SIZE(haystack),
+					&integer_needle_lesseq, &args);
+			check_int(idx, ==, testcases[i].expected_idx);
+		}
 	}
-}
 
-static void test_names_length(void)
-{
-	const char *a[] = { "a", "b", NULL };
-	check_int(names_length(a), ==, 2);
-}
-
-static void test_names_equal(void)
-{
-	const char *a[] = { "a", "b", "c", NULL };
-	const char *b[] = { "a", "b", "d", NULL };
-	const char *c[] = { "a", "b", NULL };
+	if_test ("names_length retuns size of a NULL-terminated string array") {
+		const char *a[] = { "a", "b", NULL };
+		check_int(names_length(a), ==, 2);
+	}
 
-	check(names_equal(a, a));
-	check(!names_equal(a, b));
-	check(!names_equal(a, c));
-}
+	if_test ("names_equal compares NULL-terminated string arrays") {
+		const char *a[] = { "a", "b", "c", NULL };
+		const char *b[] = { "a", "b", "d", NULL };
+		const char *c[] = { "a", "b", NULL };
 
-static void test_parse_names_normal(void)
-{
-	char in1[] = "line\n";
-	char in2[] = "a\nb\nc";
-	char **out = NULL;
-	parse_names(in1, strlen(in1), &out);
-	check_str(out[0], "line");
-	check(!out[1]);
-	free_names(out);
-
-	parse_names(in2, strlen(in2), &out);
-	check_str(out[0], "a");
-	check_str(out[1], "b");
-	check_str(out[2], "c");
-	check(!out[3]);
-	free_names(out);
-}
+		check(names_equal(a, a));
+		check(!names_equal(a, b));
+		check(!names_equal(a, c));
+	}
 
-static void test_parse_names_drop_empty(void)
-{
-	char in[] = "a\n\nb\n";
-	char **out = NULL;
-	parse_names(in, strlen(in), &out);
-	check_str(out[0], "a");
-	/* simply '\n' should be dropped as empty string */
-	check_str(out[1], "b");
-	check(!out[2]);
-	free_names(out);
-}
+	if_test ("parse_names works for basic input") {
+		char in1[] = "line\n";
+		char in2[] = "a\nb\nc";
+		char **out = NULL;
+		parse_names(in1, strlen(in1), &out);
+		check_str(out[0], "line");
+		check(!out[1]);
+		free_names(out);
+
+		parse_names(in2, strlen(in2), &out);
+		check_str(out[0], "a");
+		check_str(out[1], "b");
+		check_str(out[2], "c");
+		check(!out[3]);
+		free_names(out);
+	}
 
-static void test_common_prefix(void)
-{
-	struct strbuf a = STRBUF_INIT;
-	struct strbuf b = STRBUF_INIT;
-	struct {
-		const char *a, *b;
-		int want;
-	} cases[] = {
-		{"abcdef", "abc", 3},
-		{ "abc", "ab", 2 },
-		{ "", "abc", 0 },
-		{ "abc", "abd", 2 },
-		{ "abc", "pqr", 0 },
-	};
-
-	for (size_t i = 0; i < ARRAY_SIZE(cases); i++) {
-		strbuf_addstr(&a, cases[i].a);
-		strbuf_addstr(&b, cases[i].b);
-		check_int(common_prefix_size(&a, &b), ==, cases[i].want);
-		strbuf_reset(&a);
-		strbuf_reset(&b);
+	if_test ("parse_names drops empty string") {
+		char in[] = "a\n\nb\n";
+		char **out = NULL;
+		parse_names(in, strlen(in), &out);
+		check_str(out[0], "a");
+		/* simply '\n' should be dropped as empty string */
+		check_str(out[1], "b");
+		check(!out[2]);
+		free_names(out);
 	}
-	strbuf_release(&a);
-	strbuf_release(&b);
-}
 
-static void test_u24_roundtrip(void)
-{
-	uint32_t in = 0x112233;
-	uint8_t dest[3];
-	uint32_t out;
-	put_be24(dest, in);
-	out = get_be24(dest);
-	check_int(in, ==, out);
-}
+	if_test ("common_prefix_size works") {
+		struct strbuf a = STRBUF_INIT;
+		struct strbuf b = STRBUF_INIT;
+		struct {
+			const char *a, *b;
+			int want;
+		} cases[] = {
+			{"abcdef", "abc", 3},
+			{ "abc", "ab", 2 },
+			{ "", "abc", 0 },
+			{ "abc", "abd", 2 },
+			{ "abc", "pqr", 0 },
+		};
 
-static void test_u16_roundtrip(void)
-{
-	uint32_t in = 0xfef1;
-	uint8_t dest[3];
-	uint32_t out;
-	put_be16(dest, in);
-	out = get_be16(dest);
-	check_int(in, ==, out);
-}
+		for (size_t i = 0; i < ARRAY_SIZE(cases); i++) {
+			strbuf_addstr(&a, cases[i].a);
+			strbuf_addstr(&b, cases[i].b);
+			check_int(common_prefix_size(&a, &b), ==, cases[i].want);
+			strbuf_reset(&a);
+			strbuf_reset(&b);
+		}
+		strbuf_release(&a);
+		strbuf_release(&b);
+	}
 
-int cmd_main(int argc, const char *argv[])
-{
-	TEST(test_common_prefix(), "common_prefix_size works");
-	TEST(test_parse_names_normal(), "parse_names works for basic input");
-	TEST(test_parse_names_drop_empty(), "parse_names drops empty string");
-	TEST(test_binsearch(), "binary search with binsearch works");
-	TEST(test_names_length(), "names_length retuns size of a NULL-terminated string array");
-	TEST(test_names_equal(), "names_equal compares NULL-terminated string arrays");
-	TEST(test_u24_roundtrip(), "put_be24 and get_be24 work");
-	TEST(test_u16_roundtrip(), "put_be16 and get_be16 work");
+	if_test ("put_be24 and get_be24 work") {
+		uint32_t in = 0x112233;
+		uint8_t dest[3];
+		uint32_t out;
+		put_be24(dest, in);
+		out = get_be24(dest);
+		check_int(in, ==, out);
+	}
+
+	if_test ("put_be16 and get_be16 work") {
+		uint32_t in = 0xfef1;
+		uint8_t dest[3];
+		uint32_t out;
+		put_be16(dest, in);
+		out = get_be16(dest);
+		check_int(in, ==, out);
+	}
 
 	return test_done();
 }