97 lines
3.2 KiB
C++
97 lines
3.2 KiB
C++
/*
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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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