Function fastRemoveCornetSizeTest

POSIX/demo/demo.cpp:387–409

}

void fastRemoveCornetSizeTest() {
    string aesKey = "aes";
    auto mmkv = MMKV::mmkvWithID("fastRemoveCornerSize", MMKV_MULTI_PROCESS, &aesKey);
    mmkv->clearAll();
    auto size = getpagesize() - 4;
    size -= 4;
    string key = "key";
    auto keySize = 3 + 1;
    size -= keySize;
    auto valueSize = 3;
    size -= valueSize;
    size -= (keySize + 1); // total size of fast remove
    size /= 16;
    mmkv::MMBuffer value(size);
    auto ptr = (char *) value.getPtr();
    for (size_t i = 0; i < value.length(); i++) {
        ptr[i] = 'A';
    }
    for (int i = 0; i < 16; i++) {
        mmkv->set(value, key); // when a full write back is occur, here's corruption happens
        mmkv->removeValueForKey(key);
    }
}

void testClearEmptyMMKV() {
    auto mmkv = MMKV::mmkvWithID("emptyMMKV");