thin-provisioning-tools/unit-tests/btree_t.cc
2011-08-22 14:14:10 +01:00

107 lines
2.5 KiB
C++

#include "transaction_manager.h"
#include "core_map.h"
#include "btree.h"
#define BOOST_TEST_MODULE BTreeTests
#include <boost/test/included/unit_test.hpp>
using namespace std;
using namespace boost;
using namespace persistent_data;
//----------------------------------------------------------------
namespace {
block_address const NR_BLOCKS = 102400;
transaction_manager<4096>::ptr
create_tm() {
block_manager<4096>::ptr bm(new block_manager<4096>("./test.data", NR_BLOCKS));
space_map::ptr sm(new core_map(NR_BLOCKS));
transaction_manager<4096>::ptr tm(new transaction_manager<4096>(bm, sm));
return tm;
}
btree<1, uint64_traits, 4096>::ptr
create_btree() {
typename uint64_traits::ref_counter rc;
return btree<1, uint64_traits, 4096>::ptr(
new btree<1, uint64_traits, 4096>(
create_tm(), rc));
}
// Checks that a btree is well formed.
//
// i) No block should be in the tree more than once.
//
class constraint_visitor : public btree<1, uint64_traits, 4096>::visitor {
public:
void visit_internal(unsigned level, btree_detail::node_ref<uint64_traits, 4096> const &n) {
check_duplicate_block(n.get_location());
}
void visit_internal_leaf(unsigned level, btree_detail::node_ref<uint64_traits, 4096> const &n) {
check_duplicate_block(n.get_location());
}
void visit_leaf(unsigned level, btree_detail::node_ref<uint64_traits, 4096> const &n) {
check_duplicate_block(n.get_location());
}
private:
void check_duplicate_block(block_address b) {
if (seen_.count(b)) {
ostringstream out;
out << "duplicate block in btree: " << b;
throw runtime_error(out.str());
}
seen_.insert(b);
}
set<block_address> seen_;
};
void check_constraints(btree<1, uint64_traits, 4096>::ptr tree) {
typedef btree<1, uint64_traits, 4096> tree_type;
typename tree_type::visitor::ptr v(new constraint_visitor);
tree->visit(v);
}
}
//----------------------------------------------------------------
BOOST_AUTO_TEST_CASE(empty_btree_contains_nothing)
{
auto tree = create_btree();
check_constraints(tree);
for (uint64_t i = 0; i < 1000; i++) {
uint64_t key[1] = {i};
BOOST_CHECK(!tree->lookup(key));
}
}
BOOST_AUTO_TEST_CASE(insert_works)
{
unsigned const COUNT = 100000;
auto tree = create_btree();
for (uint64_t i = 0; i < COUNT; i++) {
uint64_t key[1] = {i * 7};
uint64_t value = i;
tree->insert(key, value);
auto l = tree->lookup(key);
BOOST_CHECK(l);
BOOST_CHECK_EQUAL(*l, i);
}
check_constraints(tree);
}
//----------------------------------------------------------------