| /* |
| * Copyright 2019 The Android Open Source Project |
| * |
| * Licensed 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 "packet/fragmenting_inserter.h" |
| |
| #include <gtest/gtest.h> |
| #include <memory> |
| |
| #include "os/log.h" |
| |
| using bluetooth::packet::FragmentingInserter; |
| using std::vector; |
| |
| namespace bluetooth { |
| namespace packet { |
| |
| TEST(FragmentingInserterTest, addMoreBits) { |
| std::vector<uint8_t> result = {0b00011101 /* 3 2 1 */, 0b00010101 /* 5 4 */, 0b11100011 /* 7 6 */, 0b10000000 /* 8 */, |
| 0b10100000 /* filled with 1010 */}; |
| std::vector<std::unique_ptr<RawBuilder>> fragments; |
| |
| FragmentingInserter it(result.size(), std::back_insert_iterator(fragments)); |
| |
| for (size_t i = 0; i < 9; i++) { |
| it.insert_bits(static_cast<uint8_t>(i), i); |
| } |
| it.insert_bits(static_cast<uint8_t>(0b1010), 4); |
| |
| it.finalize(); |
| |
| ASSERT_EQ(1, fragments.size()); |
| |
| std::vector<uint8_t> bytes; |
| BitInserter bit_inserter(bytes); |
| fragments[0]->Serialize(bit_inserter); |
| |
| ASSERT_EQ(result.size(), bytes.size()); |
| for (size_t i = 0; i < bytes.size(); i++) { |
| ASSERT_EQ(result[i], bytes[i]); |
| } |
| } |
| |
| TEST(FragmentingInserterTest, observerTest) { |
| std::vector<uint8_t> result = {0b00011101 /* 3 2 1 */, 0b00010101 /* 5 4 */, 0b11100011 /* 7 6 */, 0b10000000 /* 8 */, |
| 0b10100000 /* filled with 1010 */}; |
| std::vector<std::unique_ptr<RawBuilder>> fragments; |
| |
| FragmentingInserter it(result.size() + 1, std::back_insert_iterator(fragments)); |
| |
| std::vector<uint8_t> copy; |
| |
| uint64_t checksum = 0x0123456789abcdef; |
| it.RegisterObserver(ByteObserver([©](uint8_t byte) { copy.push_back(byte); }, [checksum]() { return checksum; })); |
| |
| for (size_t i = 0; i < 9; i++) { |
| it.insert_bits(static_cast<uint8_t>(i), i); |
| } |
| it.insert_bits(static_cast<uint8_t>(0b1010), 4); |
| it.finalize(); |
| |
| ASSERT_EQ(1, fragments.size()); |
| |
| std::vector<uint8_t> bytes; |
| BitInserter bit_inserter(bytes); |
| fragments[0]->Serialize(bit_inserter); |
| |
| ASSERT_EQ(result.size(), bytes.size()); |
| for (size_t i = 0; i < bytes.size(); i++) { |
| ASSERT_EQ(result[i], bytes[i]); |
| } |
| |
| ASSERT_EQ(result.size(), copy.size()); |
| for (size_t i = 0; i < copy.size(); i++) { |
| ASSERT_EQ(result[i], copy[i]); |
| } |
| |
| ByteObserver observer = it.UnregisterObserver(); |
| ASSERT_EQ(checksum, observer.GetValue()); |
| } |
| |
| constexpr size_t kPacketSize = 128; |
| class FragmentingTest : public ::testing::TestWithParam<size_t> { |
| public: |
| void StartUp() { |
| counts_.reserve(kPacketSize); |
| for (size_t i = 0; i < kPacketSize; i++) { |
| counts_.push_back(static_cast<uint8_t>(i)); |
| } |
| } |
| void ShutDown() { |
| counts_.clear(); |
| } |
| std::vector<uint8_t> counts_; |
| }; |
| |
| TEST_P(FragmentingTest, mtuFragmentTest) { |
| size_t mtu = GetParam(); |
| std::vector<std::unique_ptr<RawBuilder>> fragments; |
| FragmentingInserter it(mtu, std::back_insert_iterator(fragments)); |
| |
| RawBuilder original_packet(counts_); |
| ASSERT_EQ(counts_.size(), original_packet.size()); |
| |
| original_packet.Serialize(it); |
| it.finalize(); |
| |
| size_t expected_fragments = counts_.size() / mtu; |
| if (counts_.size() % mtu != 0) { |
| expected_fragments++; |
| } |
| ASSERT_EQ(expected_fragments, fragments.size()); |
| |
| std::vector<std::vector<uint8_t>> serialized_fragments; |
| for (size_t f = 0; f < fragments.size(); f++) { |
| serialized_fragments.emplace_back(mtu); |
| BitInserter bit_inserter(serialized_fragments[f]); |
| fragments[f]->Serialize(bit_inserter); |
| if (f + 1 == fragments.size() && (counts_.size() % mtu != 0)) { |
| ASSERT_EQ(serialized_fragments[f].size(), counts_.size() % mtu); |
| } else { |
| ASSERT_EQ(serialized_fragments[f].size(), mtu); |
| } |
| for (size_t b = 0; b < serialized_fragments[f].size(); b++) { |
| EXPECT_EQ(counts_[f * mtu + b], serialized_fragments[f][b]); |
| } |
| } |
| } |
| |
| INSTANTIATE_TEST_CASE_P(chopomatic, FragmentingTest, ::testing::Range<size_t>(1, kPacketSize + 1)); |
| |
| } // namespace packet |
| } // namespace bluetooth |