package com.battery.device.bts;
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import static org.junit.jupiter.api.Assertions.assertEquals;
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import static org.junit.jupiter.api.Assertions.assertFalse;
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import static org.junit.jupiter.api.Assertions.assertThrows;
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import static org.junit.jupiter.api.Assertions.assertTrue;
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import java.math.BigDecimal;
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import java.time.Instant;
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import java.time.ZoneId;
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import java.util.List;
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import java.util.Map;
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import java.util.Set;
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import org.junit.jupiter.api.Test;
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import com.battery.device.api.model.ChannelIdentity;
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import com.battery.device.api.model.DeviceWorkStatus;
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import com.battery.device.api.model.RealtimeSnapshot;
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class BtsXmlCodecTest
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{
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private final BtsXmlCodec codec = new BtsXmlCodec("lab-bts", ZoneId.of("Asia/Hong_Kong"));
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@Test
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void parsesDeviceDiscoveryAndChannelIdentity()
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{
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String xml = "<bts version=\"1.0\"><cmd>getdevinfo_resp</cmd><middle count=\"1\">"
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+ "<channel ip=\"192.168.1.35\" devtype=\"22\" devid=\"1\" subdevid=\"2\" Channelid=\"3\">true</channel>"
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+ "</middle></bts>";
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var channels = codec.parseDeviceInfo(xml);
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assertEquals(1, channels.size());
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assertEquals(new ChannelIdentity("lab-bts", 22, 1, 2, 3), channels.get(0).identity());
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assertEquals("192.168.1.35", channels.get(0).serverIp());
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}
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@Test
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void rejectsInvalidDiscoveryAvailability()
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{
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String xml = "<bts><cmd>getdevinfo_resp</cmd><middle count=\"1\">"
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+ "<channel ip=\"192.168.1.35\" devtype=\"22\" devid=\"1\" subdevid=\"2\" Channelid=\"3\">maybe</channel>"
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+ "</middle></bts>";
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BtsProtocolException exception = assertThrows(BtsProtocolException.class,
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() -> codec.parseDeviceInfo(xml));
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assertEquals(BtsProtocolException.Reason.INVALID_VALUE, exception.reason());
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}
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@Test
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void parsesRealtimeCoreDynamicAndDbcMeasurements()
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{
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String xml = "<bts version=\"1.0\"><cmd>inquire_resp</cmd><list count=\"1\">"
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+ "<inquire dev=\"22-3-2-7-0\" cycle_id=\"2\" step_id=\"4\" step_type=\"cc\" workstatus=\"working\" "
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+ "current=\"1.2\" voltage=\"3.5\" capacity=\"0.1\" energy=\"0.35\" T1=\"23.4\" log_code=\"0\">"
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+ "<DBC message_name=\"Frame1\" signal_name=\"Soc\" value=\"88.5\" unit=\"%\"/></inquire>"
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+ "</list></bts>";
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Map<ChannelIdentity, RealtimeSnapshot> result = codec.parseSnapshots(xml, Instant.parse("2026-08-25T10:00:00Z"));
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RealtimeSnapshot snapshot = result.values().iterator().next();
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assertEquals(DeviceWorkStatus.WORKING, snapshot.workStatus());
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assertEquals(new BigDecimal("1.2"), snapshot.currentA());
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assertEquals(new BigDecimal("23.4"), snapshot.measurements().get("T1").value());
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assertEquals("%", snapshot.measurements().get("DBC:Frame1:Soc").unit());
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}
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@Test
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void mapsUnknownWorkStatusWithoutDiscardingSnapshot()
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{
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String xml = "<bts><cmd>inquire_resp</cmd><list count=\"1\"><inquire dev=\"22-1-1-1-0\" workstatus=\"futureState\"/></list></bts>";
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RealtimeSnapshot snapshot = codec.parseSnapshots(xml, Instant.EPOCH).values().iterator().next();
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assertEquals(DeviceWorkStatus.UNKNOWN, snapshot.workStatus());
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}
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@Test
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void mapsFinishAsNormalCompletion()
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{
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String xml = "<bts><cmd>inquire_resp</cmd><list count=\"1\">"
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+ "<inquire dev=\"22-1-1-1-0\" workstatus=\"finish\"/></list></bts>";
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RealtimeSnapshot snapshot = codec.parseSnapshots(xml, Instant.EPOCH).values().iterator().next();
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assertEquals(DeviceWorkStatus.FINISHED, snapshot.workStatus());
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}
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@Test
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void rejectsIllegalNumericData()
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{
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String xml = "<bts><cmd>inquire_resp</cmd><list count=\"1\"><inquire dev=\"22-1-1-1-0\" current=\"bad\"/></list></bts>";
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BtsProtocolException exception = assertThrows(BtsProtocolException.class,
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() -> codec.parseSnapshots(xml, Instant.EPOCH));
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assertEquals(BtsProtocolException.Reason.INVALID_VALUE, exception.reason());
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}
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@Test
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void classifiesWrongCommandAndMalformedXml()
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{
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BtsProtocolException wrongCommand = assertThrows(BtsProtocolException.class,
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() -> codec.parseSnapshots("<bts><cmd>download_resp</cmd></bts>", Instant.EPOCH));
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BtsProtocolException malformed = assertThrows(BtsProtocolException.class,
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() -> codec.parseSnapshots("<bts><cmd>inquire_resp</cmd>", Instant.EPOCH));
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assertEquals(BtsProtocolException.Reason.UNEXPECTED_COMMAND, wrongCommand.reason());
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assertEquals(BtsProtocolException.Reason.MALFORMED_XML, malformed.reason());
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}
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@Test
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void reportsMissingRequiredField()
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{
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String xml = "<bts><cmd>inquire_resp</cmd><list count=\"1\"><inquire workstatus=\"working\"/></list></bts>";
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BtsProtocolException exception = assertThrows(BtsProtocolException.class,
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() -> codec.parseSnapshots(xml, Instant.EPOCH));
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assertEquals(BtsProtocolException.Reason.MISSING_FIELD, exception.reason());
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}
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@Test
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void rejectsResponsesMissingRequiredContainers()
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{
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BtsProtocolException discovery = assertThrows(BtsProtocolException.class,
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() -> codec.parseDeviceInfo("<bts><cmd>getdevinfo_resp</cmd></bts>"));
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BtsProtocolException realtime = assertThrows(BtsProtocolException.class,
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() -> codec.parseSnapshots("<bts><cmd>inquire_resp</cmd></bts>", Instant.EPOCH));
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assertEquals(BtsProtocolException.Reason.MISSING_FIELD, discovery.reason());
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assertEquals(BtsProtocolException.Reason.MISSING_FIELD, realtime.reason());
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}
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@Test
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void rejectsDoctypeAndExternalEntities()
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{
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String xml = "<!DOCTYPE bts [<!ENTITY xxe SYSTEM \"file:///etc/passwd\">]><bts><cmd>inquire_resp</cmd>&xxe;</bts>";
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BtsProtocolException exception = assertThrows(BtsProtocolException.class,
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() -> codec.parseSnapshots(xml, Instant.EPOCH));
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assertFalse(exception.getMessage().isBlank());
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}
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}
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