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/*
* Copyright 2021 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 "model/hci/h4_parser.h"
#include <gtest/gtest.h>
#include "osi/include/osi.h" // for OSI_NO_INTR
namespace rootcanal {
using PacketData = std::vector<uint8_t>;
class H4ParserTest : public ::testing::Test {
public:
protected:
void SetUp() override {
packet_.clear();
parser_.Reset();
}
void TearDown() override { parser_.Reset(); }
void PacketReadCallback(const std::vector<uint8_t>& packet) {
packet_ = std::move(packet);
}
protected:
H4Parser parser_{
[&](auto p) {
type_ = PacketType::COMMAND;
PacketReadCallback(p);
},
[&](auto p) {
type_ = PacketType::EVENT;
PacketReadCallback(p);
},
[&](auto p) {
type_ = PacketType::ACL;
PacketReadCallback(p);
},
[&](auto p) {
type_ = PacketType::SCO;
PacketReadCallback(p);
},
[&](auto p) {
type_ = PacketType::ISO;
PacketReadCallback(p);
},
};
PacketData packet_;
PacketType type_;
};
TEST_F(H4ParserTest, InitiallyExpectOneByte) {
ASSERT_EQ(1, (int)parser_.BytesRequested());
}
TEST_F(H4ParserTest, SwitchStateAfterType) {
uint8_t typ = (uint8_t)PacketType::ACL;
ASSERT_TRUE(parser_.Consume(&typ, 1));
ASSERT_EQ(parser_.CurrentState(), H4Parser::State::HCI_PREAMBLE);
}
TEST_F(H4ParserTest, RequestedBytesDecreases) {
// Make sure that the requested bytes is monotonically decreasing
// for the requested types.
uint8_t typ = (uint8_t)PacketType::ACL;
ASSERT_TRUE(parser_.Consume(&typ, 1));
auto wanted = parser_.BytesRequested();
while (wanted > 0) {
ASSERT_EQ(wanted, parser_.BytesRequested());
ASSERT_TRUE(parser_.Consume(&typ, 1));
wanted--;
}
ASSERT_EQ(parser_.CurrentState(), H4Parser::State::HCI_PAYLOAD);
wanted = parser_.BytesRequested();
while (wanted > 0) {
ASSERT_EQ(wanted, parser_.BytesRequested());
ASSERT_TRUE(parser_.Consume(&typ, 1));
wanted--;
}
// A callback should have been invoked.
ASSERT_LT(0, (int)packet_.size());
}
TEST_F(H4ParserTest, RejectNoData) {
// You need to give us something!
PacketData bad_bit;
ASSERT_FALSE(parser_.Consume(bad_bit.data(), bad_bit.size()));
}
TEST_F(H4ParserTest, TooMuchIsDeath) {
PacketData bad_bit({0xfd});
ASSERT_DEATH(parser_.Consume(bad_bit.data(), parser_.BytesRequested() + 1),
"More bytes read .* than expected .*!");
}
TEST_F(H4ParserTest, WrongTypeIsDeath) {
PacketData bad_bit({0xfd});
ASSERT_DEATH(parser_.Consume(bad_bit.data(), bad_bit.size()),
"Unimplemented packet type.*");
}
TEST_F(H4ParserTest, CallsTheRightCallbacks) {
// Make sure that the proper type of callback is invoked.
std::vector<PacketType> types({PacketType::ACL, PacketType::SCO,
PacketType::COMMAND, PacketType::EVENT,
PacketType::ISO});
for (auto packetType : types) {
// Configure the incoming packet.
uint8_t typ = (uint8_t)packetType;
ASSERT_TRUE(parser_.Consume(&typ, 1));
// Feed data as long as this packet is not complete.
while (parser_.CurrentState() != H4Parser::State::HCI_TYPE) {
PacketData data;
for (uint32_t i = 0; i < parser_.BytesRequested(); i++) {
data.push_back((uint8_t)i);
}
ASSERT_TRUE(parser_.Consume(data.data(), data.size()));
}
// The proper callbacks should have been invoked.
ASSERT_LT(0, (int)packet_.size());
ASSERT_EQ(packetType, type_);
}
}
} // namespace rootcanal
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