bool BTreeDriver::TestDeleteCurrent() {
Status status;
BTreeFile *btf;
bool res;
btf = new BTreeFile(status, "BTreeTest6");
if (status != OK) {
std::cerr << "ERROR: Couldn't create a BTreeFile" << std::endl;
minibase_errors.show_errors();
std::cerr << "Hit [enter] to continue..." << std::endl;
std::cin.get();
exit(1);
}
std::cout << "Starting Test 6..." << std::endl;
std::cout << "BTreeIndex created successfully." << std::endl;
std::cout << "Inserting entries..." << std::endl;
InsertRange(btf, 1, 10);
char low[MAX_KEY_LENGTH];
toString(3, low);
BTreeFileScan* scan = btf->OpenScan(low, NULL);
std::cout << "Deleting entries..." << std::endl;
RecordID rid;
char* keyPtr;
scan->GetNext(rid, keyPtr); // 3
scan->GetNext(rid, keyPtr); // 4
scan->DeleteCurrent(); // 5
scan->GetNext(rid, keyPtr); // 6
scan->GetNext(rid, keyPtr); // 7
scan->GetNext(rid, keyPtr); // 8
scan->DeleteCurrent();
delete scan;
res = TestAbsent(btf, 4);
res = TestAbsent(btf, 8);
std::cout << "Inserting duplicate entry..." << std::endl;
InsertKey(btf, 1, 3);
toString(1, low);
scan = btf->OpenScan(low, NULL);
std::cout << "Deleting entry..." << std::endl;
scan->GetNext(rid, keyPtr); // 1
scan->DeleteCurrent(); // 1
delete scan;
res = TestAbsent(btf, 1, 1);
res = TestPresent(btf, 1, 3);
if (btf->DestroyFile() != OK) {
std::cerr << "Error destroying BTreeFile" << std::endl;
res = false;
}
delete btf;
return res;
}
