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97 lines
3.2 KiB
97 lines
3.2 KiB
/* |
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* Copyright (C) 2016, The Android Open Source Project |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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#include <cstddef> |
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#include <type_traits> |
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#include "gtest/gtest.h" |
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#include "wifilogd/protocol.h" |
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namespace android { |
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namespace wifilogd { |
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// The protocol tests aim to provide friction against changes that |
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// break byte-stream compatibility. Byte-stream compatibility is |
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// important for two reasons: |
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// 1. We need to support non-C++ clients. Those clients may use bindings |
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// that are implemented in their own language, rather than using a |
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// C or C++ client library. |
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// 2. We need to maintain compatibility with older clients talking to |
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// newer versions of wifilogd. |
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TEST(ProtocolTest, AsciiMessageLayoutIsUnchanged) { |
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using protocol::AsciiMessage; |
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ASSERT_TRUE(std::is_standard_layout<AsciiMessage>::value); |
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EXPECT_EQ(0U, offsetof(AsciiMessage, data_len)); |
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EXPECT_EQ(2U, sizeof(AsciiMessage::data_len)); |
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EXPECT_EQ(2U, offsetof(AsciiMessage, tag_len)); |
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EXPECT_EQ(1U, sizeof(AsciiMessage::tag_len)); |
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EXPECT_EQ(3U, offsetof(AsciiMessage, severity)); |
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EXPECT_EQ(1U, sizeof(AsciiMessage::severity)); |
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EXPECT_EQ(4U, sizeof(AsciiMessage)); |
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} |
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TEST(ProtocolTest, CommandLayoutIsUnchanged) { |
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using protocol::Command; |
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ASSERT_TRUE(std::is_standard_layout<Command>::value); |
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EXPECT_EQ(0U, offsetof(Command, src_boottime_nsec)); |
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EXPECT_EQ(8U, sizeof(Command::src_boottime_nsec)); |
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EXPECT_EQ(8U, offsetof(Command, sequence_num)); |
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EXPECT_EQ(2U, sizeof(Command::sequence_num)); |
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EXPECT_EQ(10U, offsetof(Command, opcode)); |
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EXPECT_EQ(2U, sizeof(Command::opcode)); |
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EXPECT_EQ(12U, offsetof(Command, payload_len)); |
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EXPECT_EQ(2U, sizeof(Command::payload_len)); |
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// The |reserved| field fills out Command, in place of padding that |
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// would otherwise be added by the compiler. |
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EXPECT_EQ(14U, offsetof(Command, reserved)); |
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EXPECT_EQ(2U, sizeof(Command::reserved)); |
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EXPECT_EQ(16U, sizeof(Command)); |
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} |
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TEST(ProtocolTest, MaxMessageSizeHasNotShrunk) { |
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EXPECT_GE(protocol::kMaxMessageSize, 4096U); |
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} |
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TEST(ProtocolTest, MessageSeveritiesAreUnchanged) { |
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using protocol::MessageSeverity; |
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EXPECT_EQ(0U, static_cast<uint8_t>(MessageSeverity::kError)); |
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EXPECT_EQ(1U, static_cast<uint8_t>(MessageSeverity::kWarning)); |
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EXPECT_EQ(2U, static_cast<uint8_t>(MessageSeverity::kInformational)); |
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EXPECT_EQ(3U, static_cast<uint8_t>(MessageSeverity::kTrace)); |
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EXPECT_EQ(4U, static_cast<uint8_t>(MessageSeverity::kDump)); |
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} |
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TEST(ProtocolTest, OpcodesAreUnchanged) { |
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using protocol::Opcode; |
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EXPECT_EQ(2U, sizeof(Opcode)); |
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EXPECT_EQ(0U, static_cast<uint16_t>(Opcode::kWriteAsciiMessage)); |
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EXPECT_EQ(0x20U, static_cast<uint16_t>(Opcode::kDumpBuffers)); |
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} |
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} // namespace wifilogd |
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} // namespace android
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