| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| #include "hll.hpp" |
| |
| #include <exception> |
| #include <sstream> |
| #include <catch.hpp> |
| |
| namespace datasketches { |
| |
| static void testComposite(uint8_t lgK, const target_hll_type tgtHllType, const int n) { |
| hll_union u(lgK); |
| hll_sketch sk(lgK, tgtHllType); |
| for (int i = 0; i < n; ++i) { |
| u.update(i); |
| sk.update(i); |
| } |
| u.update(sk); // merge |
| hll_sketch res = u.get_result(target_hll_type::HLL_8); |
| double est = res.get_composite_estimate(); |
| REQUIRE(sk.get_composite_estimate() == est); |
| } |
| |
| TEST_CASE("hll array: check composite estimate", "[hll_array]") { |
| testComposite(4, target_hll_type::HLL_8, 10000); |
| testComposite(5, target_hll_type::HLL_8, 10000); |
| testComposite(6, target_hll_type::HLL_8, 10000); |
| testComposite(13, target_hll_type::HLL_8, 10000); |
| } |
| |
| static void serializeDeserialize(uint8_t lgK, target_hll_type tgtHllType, const int n) { |
| hll_sketch sk1(lgK, tgtHllType); |
| |
| for (int i = 0; i < n; ++i) { |
| sk1.update(i); |
| } |
| //REQUIRE(sk1.getCurrentMode() == CurMode::HLL); |
| |
| double est1 = sk1.get_estimate(); |
| REQUIRE(est1 == Approx(n).margin(n * 0.03)); |
| |
| // serialize as compact and updatable, deserialize, compare estimates are exact |
| std::stringstream ss(std::ios::in | std::ios::out | std::ios::binary); |
| sk1.serialize_compact(ss); |
| hll_sketch sk2 = hll_sketch::deserialize(ss); |
| REQUIRE(sk1.get_estimate() == sk2.get_estimate()); |
| |
| ss.clear(); |
| sk1.serialize_updatable(ss); |
| sk2 = hll_sketch::deserialize(ss); |
| REQUIRE(sk1.get_estimate() == sk2.get_estimate()); |
| |
| sk1.reset(); |
| REQUIRE(sk1.get_estimate() == 0.0); |
| } |
| |
| TEST_CASE("hll array: check serialize deserialize", "[hll_array]") { |
| uint8_t lgK = 4; |
| int n = 8; |
| serializeDeserialize(lgK, HLL_4, n); |
| serializeDeserialize(lgK, HLL_6, n); |
| serializeDeserialize(lgK, HLL_8, n); |
| |
| lgK = 15; |
| n = (((1 << (lgK - 3))*3)/4) + 100; |
| serializeDeserialize(lgK, HLL_4, n); |
| serializeDeserialize(lgK, HLL_6, n); |
| serializeDeserialize(lgK, HLL_8, n); |
| |
| lgK = 21; |
| n = (((1 << (lgK - 3))*3)/4) + 1000; |
| serializeDeserialize(lgK, HLL_4, n); |
| serializeDeserialize(lgK, HLL_6, n); |
| serializeDeserialize(lgK, HLL_8, n); |
| } |
| |
| TEST_CASE("hll array: check is compact", "[hll_array]") { |
| hll_sketch sk(4); |
| for (int i = 0; i < 8; ++i) { |
| sk.update(i); |
| } |
| REQUIRE_FALSE(sk.is_compact()); |
| } |
| |
| TEST_CASE("hll array: check corrupt bytearray", "[hll_array]") { |
| uint8_t lgK = 8; |
| hll_sketch sk1(lgK, HLL_8); |
| for (int i = 0; i < 50; ++i) { |
| sk1.update(i); |
| } |
| auto sketchBytes = sk1.serialize_compact(); |
| uint8_t* bytes = sketchBytes.data(); |
| const size_t size = sketchBytes.size(); |
| |
| bytes[hll_constants::PREAMBLE_INTS_BYTE] = 0; |
| REQUIRE_THROWS_AS(hll_sketch::deserialize(bytes, size), std::invalid_argument); |
| REQUIRE_THROWS_AS(HllArray<std::allocator<uint8_t>>::newHll(bytes, size, std::allocator<uint8_t>()), std::invalid_argument); |
| bytes[hll_constants::PREAMBLE_INTS_BYTE] = hll_constants::HLL_PREINTS; |
| |
| bytes[hll_constants::SER_VER_BYTE] = 0; |
| REQUIRE_THROWS_AS(hll_sketch::deserialize(bytes, size), std::invalid_argument); |
| bytes[hll_constants::SER_VER_BYTE] = hll_constants::SER_VER; |
| |
| bytes[hll_constants::FAMILY_BYTE] = 0; |
| REQUIRE_THROWS_AS(hll_sketch::deserialize(bytes, size), std::invalid_argument); |
| bytes[hll_constants::FAMILY_BYTE] = hll_constants::FAMILY_ID; |
| |
| uint8_t tmp = bytes[hll_constants::MODE_BYTE]; |
| bytes[hll_constants::MODE_BYTE] = 0x10; // HLL_6, LIST |
| REQUIRE_THROWS_AS(hll_sketch::deserialize(bytes, size), std::invalid_argument); |
| bytes[hll_constants::MODE_BYTE] = tmp; |
| |
| tmp = bytes[hll_constants::LG_ARR_BYTE]; |
| bytes[hll_constants::LG_ARR_BYTE] = 0; |
| hll_sketch::deserialize(bytes, size); |
| // should work fine despite the corruption |
| bytes[hll_constants::LG_ARR_BYTE] = tmp; |
| |
| REQUIRE_THROWS_AS(hll_sketch::deserialize(bytes, size - 1), std::out_of_range); |
| REQUIRE_THROWS_AS(hll_sketch::deserialize(bytes, 3), std::out_of_range); |
| } |
| |
| TEST_CASE("hll array: check corrupt stream", "[hll_array]") { |
| uint8_t lgK = 6; |
| hll_sketch sk1(lgK); |
| for (int i = 0; i < 50; ++i) { |
| sk1.update(i); |
| } |
| std::stringstream ss; |
| sk1.serialize_compact(ss); |
| |
| ss.seekp(hll_constants::PREAMBLE_INTS_BYTE); |
| ss.put(0); |
| ss.seekg(0); |
| REQUIRE_THROWS_AS(hll_sketch::deserialize(ss), std::invalid_argument); |
| REQUIRE_THROWS_AS(HllArray<std::allocator<uint8_t>>::newHll(ss, std::allocator<uint8_t>()), std::invalid_argument); |
| ss.seekp(hll_constants::PREAMBLE_INTS_BYTE); |
| ss.put(hll_constants::HLL_PREINTS); |
| |
| ss.seekp(hll_constants::SER_VER_BYTE); |
| ss.put(0); |
| ss.seekg(0); |
| REQUIRE_THROWS_AS(hll_sketch::deserialize(ss), std::invalid_argument); |
| ss.seekp(hll_constants::SER_VER_BYTE); |
| ss.put(hll_constants::SER_VER); |
| |
| ss.seekp(hll_constants::FAMILY_BYTE); |
| ss.put(0); |
| ss.seekg(0); |
| REQUIRE_THROWS_AS(hll_sketch::deserialize(ss), std::invalid_argument); |
| ss.seekp(hll_constants::FAMILY_BYTE); |
| ss.put(hll_constants::FAMILY_ID); |
| |
| ss.seekg(hll_constants::MODE_BYTE); |
| auto tmp = ss.get(); |
| ss.seekp(hll_constants::MODE_BYTE); |
| ss.put(0x11); // HLL_6, SET |
| ss.seekg(0); |
| REQUIRE_THROWS_AS(hll_sketch::deserialize(ss), std::invalid_argument); |
| ss.seekp(hll_constants::MODE_BYTE); |
| ss.put((char)tmp); |
| |
| ss.seekg(hll_constants::LG_ARR_BYTE); |
| tmp = ss.get(); |
| ss.seekp(hll_constants::LG_ARR_BYTE); |
| ss.put(0); |
| ss.seekg(0); |
| hll_sketch::deserialize(ss); |
| // should work fine despite the corruption |
| ss.seekp(hll_constants::LG_ARR_BYTE); |
| ss.put((char)tmp); |
| } |
| |
| } /* namespace datasketches */ |