t: port reftable/block_test.c to the unit testing framework

Makefile

@@ -1340,6 +1340,7 @@ UNIT_TEST_PROGRAMS += t-oidmap
 UNIT_TEST_PROGRAMS += t-oidtree
 UNIT_TEST_PROGRAMS += t-prio-queue
 UNIT_TEST_PROGRAMS += t-reftable-basics
+UNIT_TEST_PROGRAMS += t-reftable-block
 UNIT_TEST_PROGRAMS += t-reftable-merged
 UNIT_TEST_PROGRAMS += t-reftable-pq
 UNIT_TEST_PROGRAMS += t-reftable-record
@@ -2681,7 +2682,6 @@ REFTABLE_OBJS += reftable/stack.o
 REFTABLE_OBJS += reftable/tree.o
 REFTABLE_OBJS += reftable/writer.o
 
-REFTABLE_TEST_OBJS += reftable/block_test.o
 REFTABLE_TEST_OBJS += reftable/dump.o
 REFTABLE_TEST_OBJS += reftable/readwrite_test.o
 REFTABLE_TEST_OBJS += reftable/stack_test.o

reftable/reftable-tests.h

@@ -10,7 +10,6 @@ license that can be found in the LICENSE file or at
 #define REFTABLE_TESTS_H
 
 int basics_test_main(int argc, const char **argv);
-int block_test_main(int argc, const char **argv);
 int record_test_main(int argc, const char **argv);
 int readwrite_test_main(int argc, const char **argv);
 int stack_test_main(int argc, const char **argv);

t/helper/test-reftable.c

@@ -5,7 +5,6 @@
 int cmd__reftable(int argc, const char **argv)
 {
 	/* test from simple to complex. */
-	block_test_main(argc, argv);
 	readwrite_test_main(argc, argv);
 	stack_test_main(argc, argv);
 	return 0;