163 lines
7.8 KiB
C++
163 lines
7.8 KiB
C++
#include "dbc_decoder.h"
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#include <QtTest>
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#include <limits>
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#include <sstream>
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struct DecodeCase {
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const char *name;
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ByteOrder byteOrder;
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std::uint32_t startBit;
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std::uint32_t length;
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ValueType valueType;
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std::vector<std::uint8_t> data;
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bool valid;
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std::int64_t rawValue;
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double factor;
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double offset;
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double physicalValue;
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};
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Q_DECLARE_METATYPE(DecodeCase)
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class DbcDecoderTest : public QObject {
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Q_OBJECT
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private Q_SLOTS:
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void decode_data();
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void decode();
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void boundaries();
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};
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void DbcDecoderTest::decode_data() {
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QTest::addColumn<DecodeCase>("test");
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const DecodeCase cases[] = {
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{"Motorola reproduction", ByteOrder::Motorola, 7U, 16U, ValueType::Unsigned, {0x12, 0x34}, true, 0x1234, 1.0, 0.0, 4660.0},
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{"Motorola within byte", ByteOrder::Motorola, 5U, 4U, ValueType::Unsigned, {0xAC}, true, 11, 1.0, 0.0, 11.0},
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{"Motorola unaligned crossing", ByteOrder::Motorola, 3U, 12U, ValueType::Unsigned, {0xAB, 0xCD}, true, 0xBCD, 1.0, 0.0, 3021.0},
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{"Motorola starts at bit zero", ByteOrder::Motorola, 0U, 2U, ValueType::Unsigned, {0x01, 0x80}, true, 3, 1.0, 0.0, 3.0},
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{"Motorola second byte", ByteOrder::Motorola, 15U, 16U, ValueType::Unsigned, {0xFF, 0x12, 0x34}, true, 0x1234, 1.0, 0.0, 4660.0},
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{"Motorola signed scaled", ByteOrder::Motorola, 7U, 16U, ValueType::Signed, {0xFF, 0xFE}, true, -2, 0.5, 10.0, 9.0},
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{"Motorola 64 bits", ByteOrder::Motorola, 7U, 64U, ValueType::Unsigned, {0, 0, 0, 0, 0, 0, 0x12, 0x34}, true, 0x1234, 1.0, 0.0, 4660.0},
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{"Motorola 64 bits high bit", ByteOrder::Motorola, 7U, 64U, ValueType::Unsigned, {0x40, 0, 0, 0, 0, 0, 0, 0}, true, 0x4000000000000000LL, 1.0, 0.0, 4611686018427387904.0},
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{"Motorola short payload", ByteOrder::Motorola, 7U, 16U, ValueType::Unsigned, {0x12}, false, 0, 1.0, 0.0, 0.0},
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{"Motorola empty payload", ByteOrder::Motorola, 7U, 8U, ValueType::Unsigned, {}, false, 0, 1.0, 0.0, 0.0},
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{"Motorola large start", ByteOrder::Motorola, std::numeric_limits<std::uint32_t>::max(), 8U, ValueType::Unsigned, {0xFF}, false, 0, 1.0, 0.0, 0.0},
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{"Motorola zero length", ByteOrder::Motorola, 7U, 0U, ValueType::Unsigned, {0xFF}, false, 0, 1.0, 0.0, 0.0},
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{"Motorola excessive length", ByteOrder::Motorola, 7U, 65U, ValueType::Unsigned,
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std::vector<std::uint8_t>(9U, 0xFF), false, 0, 1.0, 0.0, 0.0},
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{"Intel regression", ByteOrder::Intel, 0U, 16U, ValueType::Unsigned, {0x12, 0x34}, true, 0x3412, 1.0, 0.0, 13330.0},
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{"Intel signed regression", ByteOrder::Intel, 0U, 16U, ValueType::Signed, {0xFE, 0xFF}, true, -2, 0.5, 10.0, 9.0},
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{"Intel short payload", ByteOrder::Intel, 0U, 16U, ValueType::Unsigned, {0x12}, false, 0, 1.0, 0.0, 0.0}};
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for (const DecodeCase &test: cases)
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QTest::newRow(test.name) << test;
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}
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void DbcDecoderTest::decode() {
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QFETCH(DecodeCase, test);
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DecodeSignal signal;
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signal.name = test.name;
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signal.byteOrder = test.byteOrder;
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signal.startBit = test.startBit;
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signal.length = test.length;
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signal.valueType = test.valueType;
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signal.factor = test.factor;
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signal.offset = test.offset;
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DecodeFrame definition;
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definition.canId = 0x123U;
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definition.dlc = static_cast<std::uint8_t>(test.data.size());
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definition.signals.push_back(signal);
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DecodeDatabase database;
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database.frames.push_back(definition);
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database.frameIndexByKey.emplace(FrameKey(definition.canId, false), 0U);
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RawCanFrame frame;
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frame.canId = definition.canId;
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frame.data = test.data;
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const DecodedFrameValue result = DbcDecoder().Decode(database, frame);
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QVERIFY2(result.valid, test.name);
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QCOMPARE(result.definition, &database.frames[0]);
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QCOMPARE(result.signals.size(), std::size_t(1U));
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const DecodedSignalValue &decoded = result.signals[0];
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QCOMPARE(decoded.definition, &database.frames[0].signals[0]);
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QCOMPARE(decoded.valid, test.valid);
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if (!test.valid)
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return;
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if (test.valueType == ValueType::Signed) {
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const std::int64_t *raw = std::get_if<std::int64_t>(&decoded.rawValue);
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QVERIFY(raw != nullptr);
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QCOMPARE(*raw, test.rawValue);
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} else {
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const std::uint64_t *raw = std::get_if<std::uint64_t>(&decoded.rawValue);
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QVERIFY(raw != nullptr);
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QCOMPARE(*raw, static_cast<std::uint64_t>(test.rawValue));
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}
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QCOMPARE(decoded.physicalValue, test.physicalValue);
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}
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void DbcDecoderTest::boundaries() {
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for (ByteOrder order: {ByteOrder::Intel, ByteOrder::Motorola}) {
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for (ValueType type: {ValueType::Unsigned, ValueType::Signed}) {
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for (std::uint64_t bits: {std::uint64_t(0U), std::uint64_t(0x7FFFFFFFFFFFFFFFULL),
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std::uint64_t(0x8000000000000000ULL),
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std::uint64_t(0x8000000000000001ULL),
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std::uint64_t(0xFFFFFFFFFFFFFFFFULL)}) {
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DecodeDatabase database;
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DecodeFrame definition;
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DecodeSignal signal;
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signal.startBit = order == ByteOrder::Intel ? 0U : 7U;
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signal.length = 64U;
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signal.byteOrder = order;
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signal.valueType = type;
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signal.factor = 0.5;
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signal.offset = 10.0;
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definition.signals.push_back(signal);
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database.frames.push_back(definition);
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database.frameIndexByKey.emplace(FrameKey(0U, false), 0U);
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RawCanFrame frame;
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for (unsigned byte = 0U; byte < 8U; ++byte) {
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const unsigned shift = (order == ByteOrder::Intel ? byte : 7U - byte) * 8U;
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frame.data.push_back(static_cast<std::uint8_t>(bits >> shift));
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}
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const DecodedFrameValue result = DbcDecoder().Decode(database, frame);
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const std::int64_t signedExpected = bits <= 0x7FFFFFFFFFFFFFFFULL
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? static_cast<std::int64_t>(bits)
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: std::numeric_limits<std::int64_t>::min() +
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static_cast<std::int64_t>(bits - 0x8000000000000000ULL);
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const DecodedSignalValue &decoded = result.signals.at(0U);
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const RawSignalValue expected = type == ValueType::Unsigned
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? std::variant<std::int64_t, std::uint64_t>(bits)
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: std::variant<std::int64_t, std::uint64_t>(signedExpected);
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const double physical = (type == ValueType::Unsigned
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? static_cast<double>(bits)
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: static_cast<double>(signedExpected)) *
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0.5 +
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10.0;
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std::ostringstream actualText;
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std::ostringstream expectedText;
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if (const std::int64_t *signedValue = std::get_if<std::int64_t>(&decoded.rawValue))
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actualText << *signedValue;
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else
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actualText << std::get<std::uint64_t>(decoded.rawValue);
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if (type == ValueType::Unsigned)
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expectedText << bits;
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else
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expectedText << signedExpected;
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QVERIFY(decoded.valid);
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QVERIFY(decoded.rawValue == expected);
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QCOMPARE(decoded.physicalValue, physical);
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QCOMPARE(actualText.str(), expectedText.str());
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}
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}
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}
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}
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int RunDecoderTests(int argc, char **argv) {
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DbcDecoderTest tests;
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return QTest::qExec(&tests, argc, argv);
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}
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#include "dbc_decoder_test.moc"
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