test(gb32960): red — isolation test suite for body parser block failures
4 个测试覆盖： - fixedLengthBlockFailure_isIsolated_subsequentBlocksStillParsed - truncatedFixedLengthBlock_isWrappedAsRaw_loopTerminates - variableLengthBlockFailure_swallowsRemainderAsRaw_loopBreaks - strictMode_throwsOnAnyBlockFailure（当前行为已经抛异常，即通过） 外加在 Gb32960BodyParser 上加了 lenientBlockFailure 字段 + setter 的 stub（默认 true， 尚未接入主循环逻辑；行为变化由下一个 commit 实现），确保测试文件能编译。 当前运行：Tests run: 4, Errors: 3（3 个隔离场景未实现），strictMode PASS。 Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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package com.lingniu.ingest.protocol.gb32960.codec;
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import com.lingniu.ingest.api.spi.DecodeException;
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import com.lingniu.ingest.protocol.gb32960.codec.parser.v2016.PositionV2016BlockParser;
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import com.lingniu.ingest.protocol.gb32960.codec.parser.v2016.VehicleV2016BlockParser;
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import com.lingniu.ingest.protocol.gb32960.model.InfoBlock;
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import com.lingniu.ingest.protocol.gb32960.model.InfoBlockType;
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import com.lingniu.ingest.protocol.gb32960.model.ProtocolVersion;
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import org.junit.jupiter.api.Test;
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import java.io.ByteArrayOutputStream;
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import java.nio.ByteBuffer;
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import java.util.List;
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import static org.assertj.core.api.Assertions.assertThat;
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import static org.assertj.core.api.Assertions.assertThatThrownBy;
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/**
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* 验证 {@link Gb32960BodyParser} 单块异常隔离行为。
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*
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* <p>三个隔离场景：
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* <ol>
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* <li>固定长度块 parser 抛异常 → 失败块兜 Raw（按 fixedLen 截取）+ 后续块继续解析
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* <li>固定长度块剩余字节不足（截断帧） → 兜 Raw(剩余) + break 循环
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* <li>变长块 parser 抛异常 → 兜 Raw(从失败块起剩余全部) + break 循环
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* </ol>
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*
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* <p>外加一个严格模式回退测试：{@code lenientBlockFailure=false} 时异常应抛 DecodeException。
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*/
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class Gb32960BodyParserIsolationTest {
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/** 模拟一个固定长度的 Position parser，声明 fixedLength=9，parse 时主动抛异常。 */
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private static final InfoBlockParser EXPLODING_FIXED_LEN_POSITION = new InfoBlockParser() {
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@Override public ProtocolVersion version() { return ProtocolVersion.V2016; }
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@Override public int typeCode() { return 0x05; }
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@Override public int fixedLength() { return 9; }
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@Override public InfoBlock parse(ByteBuffer buffer) {
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buffer.get();
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buffer.get();
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throw new DecodeException("simulated parser failure in Position");
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}
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};
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/** 模拟一个变长 Alarm parser（fixedLength=-1），消费若干字节后抛。 */
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private static final InfoBlockParser EXPLODING_VAR_LEN_ALARM = new InfoBlockParser() {
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@Override public ProtocolVersion version() { return ProtocolVersion.V2016; }
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@Override public int typeCode() { return 0x07; }
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@Override public int fixedLength() { return -1; }
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@Override public InfoBlock parse(ByteBuffer buffer) {
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buffer.get();
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throw new DecodeException("simulated parser failure in Alarm list-length read");
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}
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};
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@Test
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void fixedLengthBlockFailure_isIsolated_subsequentBlocksStillParsed() {
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InfoBlockParserRegistry registry = new InfoBlockParserRegistry(List.of(
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new VehicleV2016BlockParser(),
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EXPLODING_FIXED_LEN_POSITION));
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Gb32960BodyParser parser = new Gb32960BodyParser(registry);
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ByteArrayOutputStream os = new ByteArrayOutputStream();
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writeValidVehicle(os); // 1 + 20 = 21B
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writePositionTypeAnd9ByteBody(os); // 1 + 9 = 10B（parser 会爆）
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writeValidVehicle(os); // 1 + 20 = 21B
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ByteBuffer body = ByteBuffer.wrap(os.toByteArray());
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var result = parser.parse(ProtocolVersion.V2016, body);
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assertThat(result.blocks()).hasSize(3);
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assertThat(result.blocks().get(0)).isInstanceOf(InfoBlock.Gb32960V2016.Vehicle.class);
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assertThat(result.blocks().get(1)).isInstanceOfSatisfying(InfoBlock.Raw.class, raw -> {
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assertThat(raw.typeCode()).isEqualTo(0x05);
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assertThat(raw.type()).isEqualTo(InfoBlockType.RAW);
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assertThat(raw.bytes()).hasSize(9);
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});
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assertThat(result.blocks().get(2)).isInstanceOf(InfoBlock.Gb32960V2016.Vehicle.class);
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assertThat(body.hasRemaining()).isFalse();
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}
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@Test
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void truncatedFixedLengthBlock_isWrappedAsRaw_loopTerminates() {
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InfoBlockParserRegistry registry = new InfoBlockParserRegistry(List.of(
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new VehicleV2016BlockParser(),
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new PositionV2016BlockParser()));
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Gb32960BodyParser parser = new Gb32960BodyParser(registry);
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ByteArrayOutputStream os = new ByteArrayOutputStream();
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writeValidVehicle(os);
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os.write(0x05);
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os.write(0);
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os.write(0);
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os.write(0);
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ByteBuffer body = ByteBuffer.wrap(os.toByteArray());
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var result = parser.parse(ProtocolVersion.V2016, body);
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assertThat(result.blocks()).hasSize(2);
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assertThat(result.blocks().get(0)).isInstanceOf(InfoBlock.Gb32960V2016.Vehicle.class);
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assertThat(result.blocks().get(1)).isInstanceOfSatisfying(InfoBlock.Raw.class, raw -> {
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assertThat(raw.typeCode()).isEqualTo(0x05);
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assertThat(raw.bytes()).hasSize(3);
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});
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}
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@Test
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void variableLengthBlockFailure_swallowsRemainderAsRaw_loopBreaks() {
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InfoBlockParserRegistry registry = new InfoBlockParserRegistry(List.of(
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new VehicleV2016BlockParser(),
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EXPLODING_VAR_LEN_ALARM));
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Gb32960BodyParser parser = new Gb32960BodyParser(registry);
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ByteArrayOutputStream os = new ByteArrayOutputStream();
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writeValidVehicle(os);
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os.write(0x07);
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for (int i = 0; i < 10; i++) os.write(0xAA);
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writeValidVehicle(os);
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ByteBuffer body = ByteBuffer.wrap(os.toByteArray());
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var result = parser.parse(ProtocolVersion.V2016, body);
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assertThat(result.blocks()).hasSize(2);
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assertThat(result.blocks().get(0)).isInstanceOf(InfoBlock.Gb32960V2016.Vehicle.class);
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assertThat(result.blocks().get(1)).isInstanceOfSatisfying(InfoBlock.Raw.class, raw -> {
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assertThat(raw.typeCode()).isEqualTo(0x07);
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assertThat(raw.bytes()).hasSize(31);
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});
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}
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@Test
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void strictMode_throwsOnAnyBlockFailure() {
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InfoBlockParserRegistry registry = new InfoBlockParserRegistry(List.of(
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new VehicleV2016BlockParser(),
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EXPLODING_FIXED_LEN_POSITION));
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Gb32960BodyParser parser = new Gb32960BodyParser(registry);
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parser.setLenientBlockFailure(false);
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ByteArrayOutputStream os = new ByteArrayOutputStream();
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writeValidVehicle(os);
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writePositionTypeAnd9ByteBody(os);
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ByteBuffer body = ByteBuffer.wrap(os.toByteArray());
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assertThatThrownBy(() -> parser.parse(ProtocolVersion.V2016, body))
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.isInstanceOf(DecodeException.class);
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}
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private static void writeValidVehicle(ByteArrayOutputStream os) {
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os.write(0x01);
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os.write(0x01);
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os.write(0x01);
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os.write(0x01);
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os.write(0); os.write(0);
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os.write(0); os.write(0); os.write(0); os.write(0);
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os.write(0); os.write(0);
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os.write(0); os.write(0);
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os.write(50);
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os.write(0x01);
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os.write(0);
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os.write(0); os.write(0);
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os.write(0);
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os.write(0);
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}
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private static void writePositionTypeAnd9ByteBody(ByteArrayOutputStream os) {
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os.write(0x05);
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for (int i = 0; i < 9; i++) os.write(0);
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}
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}
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