thin-provisioning-tools/unit-tests/btree_counter_t.cc
Joe Thornber e801cc607b [block_manager] Hard code block size to 4k.
We're never going to use anything other than 4k, and by hard coding it we
avoid making block_manager a template.
2020-04-30 14:30:01 +01:00

82 lines
1.9 KiB
C++

#include "gmock/gmock.h"
#include "test_utils.h"
#include "persistent-data/data-structures/btree.h"
#include "persistent-data/data-structures/btree_counter.h"
#include "persistent-data/space-maps/core.h"
#include "persistent-data/data-structures/simple_traits.h"
using namespace base;
using namespace std;
using namespace persistent_data;
using namespace test;
using namespace testing;
//----------------------------------------------------------------
namespace {
block_address const BLOCK_SIZE = 4096;
block_address const NR_BLOCKS = 102400;
block_address const SUPERBLOCK = 0;
class BTreeCounterTests : public Test {
public:
BTreeCounterTests()
: bm_(create_bm(NR_BLOCKS)),
sm_(setup_core_map()),
tm_(bm_, sm_) {
}
void check_nr_metadata_blocks_is_ge(unsigned n) {
block_counter bc;
noop_value_counter<uint64_t> vc;
count_btree_blocks(*tree_, bc, vc);
ASSERT_THAT(bc.get_counts().size(), Ge(n));
}
with_temp_directory dir_;
block_manager::ptr bm_;
space_map::ptr sm_;
transaction_manager tm_;
uint64_traits::ref_counter rc_;
btree<1, uint64_traits>::ptr tree_;
private:
space_map::ptr setup_core_map() {
space_map::ptr sm(new core_map(NR_BLOCKS));
sm->inc(SUPERBLOCK);
return sm;
}
void commit() {
block_manager::write_ref superblock(bm_->superblock(SUPERBLOCK));
}
};
}
//----------------------------------------------------------------
TEST_F(BTreeCounterTests, count_empty_tree)
{
tree_.reset(new btree<1, uint64_traits>(tm_, rc_));
tm_.get_bm()->flush();
check_nr_metadata_blocks_is_ge(1);
}
TEST_F(BTreeCounterTests, count_populated_tree)
{
tree_.reset(new btree<1, uint64_traits>(tm_, rc_));
for (unsigned i = 0; i < 10000; i++) {
uint64_t key[1] = {i};
tree_->insert(key, 0ull);
}
tm_.get_bm()->flush();
check_nr_metadata_blocks_is_ge(40);
}
//----------------------------------------------------------------