1 files changed, 382 insertions, 0 deletions
diff --git a/t/unit-tests/t-reftable-block.c b/t/unit-tests/t-reftable-block.c
new file mode 100644
index 0000000000..f9af907117
--- /dev/null
+++ b/t/unit-tests/t-reftable-block.c
@@ -0,0 +1,382 @@
+/*
+Copyright 2020 Google LLC
+
+Use of this source code is governed by a BSD-style
+license that can be found in the LICENSE file or at
+https://developers.google.com/open-source/licenses/bsd
+*/
+
+#include "test-lib.h"
+#include "reftable/block.h"
+#include "reftable/blocksource.h"
+#include "reftable/constants.h"
+#include "reftable/reftable-error.h"
+
+static void t_ref_block_read_write(void)
+{
+	const int header_off = 21; /* random */
+	struct reftable_record recs[30];
+	const size_t N = ARRAY_SIZE(recs);
+	const size_t block_size = 1024;
+	struct reftable_block block = { 0 };
+	struct block_writer bw = {
+		.last_key = REFTABLE_BUF_INIT,
+	};
+	struct reftable_record rec = {
+		.type = BLOCK_TYPE_REF,
+	};
+	size_t i = 0;
+	int ret;
+	struct block_reader br = { 0 };
+	struct block_iter it = BLOCK_ITER_INIT;
+	struct reftable_buf want = REFTABLE_BUF_INIT, buf = REFTABLE_BUF_INIT;
+
+	REFTABLE_CALLOC_ARRAY(block.data, block_size);
+	check(block.data != NULL);
+	block.len = block_size;
+	block_source_from_buf(&block.source ,&buf);
+	ret = block_writer_init(&bw, BLOCK_TYPE_REF, block.data, block_size,
+				header_off, hash_size(GIT_SHA1_FORMAT_ID));
+	check(!ret);
+
+	rec.u.ref.refname = (char *) "";
+	rec.u.ref.value_type = REFTABLE_REF_DELETION;
+	ret = block_writer_add(&bw, &rec);
+	check_int(ret, ==, REFTABLE_API_ERROR);
+
+	for (i = 0; i < N; i++) {
+		rec.u.ref.refname = xstrfmt("branch%02"PRIuMAX, (uintmax_t)i);
+		rec.u.ref.value_type = REFTABLE_REF_VAL1;
+		memset(rec.u.ref.value.val1, i, GIT_SHA1_RAWSZ);
+
+		recs[i] = rec;
+		ret = block_writer_add(&bw, &rec);
+		rec.u.ref.refname = NULL;
+		rec.u.ref.value_type = REFTABLE_REF_DELETION;
+		check_int(ret, ==, 0);
+	}
+
+	ret = block_writer_finish(&bw);
+	check_int(ret, >, 0);
+
+	block_writer_release(&bw);
+
+	block_reader_init(&br, &block, header_off, block_size, GIT_SHA1_RAWSZ);
+
+	block_iter_seek_start(&it, &br);
+
+	for (i = 0; ; i++) {
+		ret = block_iter_next(&it, &rec);
+		check_int(ret, >=, 0);
+		if (ret > 0) {
+			check_int(i, ==, N);
+			break;
+		}
+		check(reftable_record_equal(&recs[i], &rec, GIT_SHA1_RAWSZ));
+	}
+
+	for (i = 0; i < N; i++) {
+		block_iter_reset(&it);
+		reftable_record_key(&recs[i], &want);
+
+		ret = block_iter_seek_key(&it, &br, &want);
+		check_int(ret, ==, 0);
+
+		ret = block_iter_next(&it, &rec);
+		check_int(ret, ==, 0);
+
+		check(reftable_record_equal(&recs[i], &rec, GIT_SHA1_RAWSZ));
+
+		want.len--;
+		ret = block_iter_seek_key(&it, &br, &want);
+		check_int(ret, ==, 0);
+
+		ret = block_iter_next(&it, &rec);
+		check_int(ret, ==, 0);
+		check(reftable_record_equal(&recs[10 * (i / 10)], &rec, GIT_SHA1_RAWSZ));
+	}
+
+	block_reader_release(&br);
+	block_iter_close(&it);
+	reftable_record_release(&rec);
+	reftable_block_done(&br.block);
+	reftable_buf_release(&want);
+	reftable_buf_release(&buf);
+	for (i = 0; i < N; i++)
+		reftable_record_release(&recs[i]);
+}
+
+static void t_log_block_read_write(void)
+{
+	const int header_off = 21;
+	struct reftable_record recs[30];
+	const size_t N = ARRAY_SIZE(recs);
+	const size_t block_size = 2048;
+	struct reftable_block block = { 0 };
+	struct block_writer bw = {
+		.last_key = REFTABLE_BUF_INIT,
+	};
+	struct reftable_record rec = {
+		.type = BLOCK_TYPE_LOG,
+	};
+	size_t i = 0;
+	int ret;
+	struct block_reader br = { 0 };
+	struct block_iter it = BLOCK_ITER_INIT;
+	struct reftable_buf want = REFTABLE_BUF_INIT, buf = REFTABLE_BUF_INIT;
+
+	REFTABLE_CALLOC_ARRAY(block.data, block_size);
+	check(block.data != NULL);
+	block.len = block_size;
+	block_source_from_buf(&block.source ,&buf);
+	ret = block_writer_init(&bw, BLOCK_TYPE_LOG, block.data, block_size,
+				header_off, hash_size(GIT_SHA1_FORMAT_ID));
+	check(!ret);
+
+	for (i = 0; i < N; i++) {
+		rec.u.log.refname = xstrfmt("branch%02"PRIuMAX , (uintmax_t)i);
+		rec.u.log.update_index = i;
+		rec.u.log.value_type = REFTABLE_LOG_UPDATE;
+
+		recs[i] = rec;
+		ret = block_writer_add(&bw, &rec);
+		rec.u.log.refname = NULL;
+		rec.u.log.value_type = REFTABLE_LOG_DELETION;
+		check_int(ret, ==, 0);
+	}
+
+	ret = block_writer_finish(&bw);
+	check_int(ret, >, 0);
+
+	block_writer_release(&bw);
+
+	block_reader_init(&br, &block, header_off, block_size, GIT_SHA1_RAWSZ);
+
+	block_iter_seek_start(&it, &br);
+
+	for (i = 0; ; i++) {
+		ret = block_iter_next(&it, &rec);
+		check_int(ret, >=, 0);
+		if (ret > 0) {
+			check_int(i, ==, N);
+			break;
+		}
+		check(reftable_record_equal(&recs[i], &rec, GIT_SHA1_RAWSZ));
+	}
+
+	for (i = 0; i < N; i++) {
+		block_iter_reset(&it);
+		reftable_buf_reset(&want);
+		check(!reftable_buf_addstr(&want, recs[i].u.log.refname));
+
+		ret = block_iter_seek_key(&it, &br, &want);
+		check_int(ret, ==, 0);
+
+		ret = block_iter_next(&it, &rec);
+		check_int(ret, ==, 0);
+
+		check(reftable_record_equal(&recs[i], &rec, GIT_SHA1_RAWSZ));
+
+		want.len--;
+		ret = block_iter_seek_key(&it, &br, &want);
+		check_int(ret, ==, 0);
+
+		ret = block_iter_next(&it, &rec);
+		check_int(ret, ==, 0);
+		check(reftable_record_equal(&recs[10 * (i / 10)], &rec, GIT_SHA1_RAWSZ));
+	}
+
+	block_reader_release(&br);
+	block_iter_close(&it);
+	reftable_record_release(&rec);
+	reftable_block_done(&br.block);
+	reftable_buf_release(&want);
+	reftable_buf_release(&buf);
+	for (i = 0; i < N; i++)
+		reftable_record_release(&recs[i]);
+}
+
+static void t_obj_block_read_write(void)
+{
+	const int header_off = 21;
+	struct reftable_record recs[30];
+	const size_t N = ARRAY_SIZE(recs);
+	const size_t block_size = 1024;
+	struct reftable_block block = { 0 };
+	struct block_writer bw = {
+		.last_key = REFTABLE_BUF_INIT,
+	};
+	struct reftable_record rec = {
+		.type = BLOCK_TYPE_OBJ,
+	};
+	size_t i = 0;
+	int ret;
+	struct block_reader br = { 0 };
+	struct block_iter it = BLOCK_ITER_INIT;
+	struct reftable_buf want = REFTABLE_BUF_INIT, buf = REFTABLE_BUF_INIT;
+
+	REFTABLE_CALLOC_ARRAY(block.data, block_size);
+	check(block.data != NULL);
+	block.len = block_size;
+	block_source_from_buf(&block.source, &buf);
+	ret = block_writer_init(&bw, BLOCK_TYPE_OBJ, block.data, block_size,
+				header_off, hash_size(GIT_SHA1_FORMAT_ID));
+	check(!ret);
+
+	for (i = 0; i < N; i++) {
+		uint8_t bytes[] = { i, i + 1, i + 2, i + 3, i + 5 }, *allocated;
+		DUP_ARRAY(allocated, bytes, ARRAY_SIZE(bytes));
+
+		rec.u.obj.hash_prefix = allocated;
+		rec.u.obj.hash_prefix_len = 5;
+
+		recs[i] = rec;
+		ret = block_writer_add(&bw, &rec);
+		rec.u.obj.hash_prefix = NULL;
+		rec.u.obj.hash_prefix_len = 0;
+		check_int(ret, ==, 0);
+	}
+
+	ret = block_writer_finish(&bw);
+	check_int(ret, >, 0);
+
+	block_writer_release(&bw);
+
+	block_reader_init(&br, &block, header_off, block_size, GIT_SHA1_RAWSZ);
+
+	block_iter_seek_start(&it, &br);
+
+	for (i = 0; ; i++) {
+		ret = block_iter_next(&it, &rec);
+		check_int(ret, >=, 0);
+		if (ret > 0) {
+			check_int(i, ==, N);
+			break;
+		}
+		check(reftable_record_equal(&recs[i], &rec, GIT_SHA1_RAWSZ));
+	}
+
+	for (i = 0; i < N; i++) {
+		block_iter_reset(&it);
+		reftable_record_key(&recs[i], &want);
+
+		ret = block_iter_seek_key(&it, &br, &want);
+		check_int(ret, ==, 0);
+
+		ret = block_iter_next(&it, &rec);
+		check_int(ret, ==, 0);
+
+		check(reftable_record_equal(&recs[i], &rec, GIT_SHA1_RAWSZ));
+	}
+
+	block_reader_release(&br);
+	block_iter_close(&it);
+	reftable_record_release(&rec);
+	reftable_block_done(&br.block);
+	reftable_buf_release(&want);
+	reftable_buf_release(&buf);
+	for (i = 0; i < N; i++)
+		reftable_record_release(&recs[i]);
+}
+
+static void t_index_block_read_write(void)
+{
+	const int header_off = 21;
+	struct reftable_record recs[30];
+	const size_t N = ARRAY_SIZE(recs);
+	const size_t block_size = 1024;
+	struct reftable_block block = { 0 };
+	struct block_writer bw = {
+		.last_key = REFTABLE_BUF_INIT,
+	};
+	struct reftable_record rec = {
+		.type = BLOCK_TYPE_INDEX,
+		.u.idx.last_key = REFTABLE_BUF_INIT,
+	};
+	size_t i = 0;
+	int ret;
+	struct block_reader br = { 0 };
+	struct block_iter it = BLOCK_ITER_INIT;
+	struct reftable_buf want = REFTABLE_BUF_INIT, buf = REFTABLE_BUF_INIT;
+
+	REFTABLE_CALLOC_ARRAY(block.data, block_size);
+	check(block.data != NULL);
+	block.len = block_size;
+	block_source_from_buf(&block.source, &buf);
+	ret = block_writer_init(&bw, BLOCK_TYPE_INDEX, block.data, block_size,
+				header_off, hash_size(GIT_SHA1_FORMAT_ID));
+	check(!ret);
+
+	for (i = 0; i < N; i++) {
+		char buf[128];
+
+		snprintf(buf, sizeof(buf), "branch%02"PRIuMAX, (uintmax_t)i);
+
+		reftable_buf_init(&recs[i].u.idx.last_key);
+		recs[i].type = BLOCK_TYPE_INDEX;
+		check(!reftable_buf_addstr(&recs[i].u.idx.last_key, buf));
+		recs[i].u.idx.offset = i;
+
+		ret = block_writer_add(&bw, &recs[i]);
+		check_int(ret, ==, 0);
+	}
+
+	ret = block_writer_finish(&bw);
+	check_int(ret, >, 0);
+
+	block_writer_release(&bw);
+
+	block_reader_init(&br, &block, header_off, block_size, GIT_SHA1_RAWSZ);
+
+	block_iter_seek_start(&it, &br);
+
+	for (i = 0; ; i++) {
+		ret = block_iter_next(&it, &rec);
+		check_int(ret, >=, 0);
+		if (ret > 0) {
+			check_int(i, ==, N);
+			break;
+		}
+		check(reftable_record_equal(&recs[i], &rec, GIT_SHA1_RAWSZ));
+	}
+
+	for (i = 0; i < N; i++) {
+		block_iter_reset(&it);
+		reftable_record_key(&recs[i], &want);
+
+		ret = block_iter_seek_key(&it, &br, &want);
+		check_int(ret, ==, 0);
+
+		ret = block_iter_next(&it, &rec);
+		check_int(ret, ==, 0);
+
+		check(reftable_record_equal(&recs[i], &rec, GIT_SHA1_RAWSZ));
+
+		want.len--;
+		ret = block_iter_seek_key(&it, &br, &want);
+		check_int(ret, ==, 0);
+
+		ret = block_iter_next(&it, &rec);
+		check_int(ret, ==, 0);
+		check(reftable_record_equal(&recs[10 * (i / 10)], &rec, GIT_SHA1_RAWSZ));
+	}
+
+	block_reader_release(&br);
+	block_iter_close(&it);
+	reftable_record_release(&rec);
+	reftable_block_done(&br.block);
+	reftable_buf_release(&want);
+	reftable_buf_release(&buf);
+	for (i = 0; i < N; i++)
+		reftable_record_release(&recs[i]);
+}
+
+int cmd_main(int argc UNUSED, const char *argv[] UNUSED)
+{
+	TEST(t_index_block_read_write(), "read-write operations on index blocks work");
+	TEST(t_log_block_read_write(), "read-write operations on log blocks work");
+	TEST(t_obj_block_read_write(), "read-write operations on obj blocks work");
+	TEST(t_ref_block_read_write(), "read-write operations on ref blocks work");
+
+	return test_done();
+}