1 files changed, 39 insertions, 0 deletions
diff --git a/src/test/java/org/traccar/helper/ChecksumTest.java b/src/test/java/org/traccar/helper/ChecksumTest.java
new file mode 100644
index 000000000..5737b9ff5
--- /dev/null
+++ b/src/test/java/org/traccar/helper/ChecksumTest.java
@@ -0,0 +1,39 @@
+package org.traccar.helper;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import org.junit.Test;
+
+import java.nio.charset.StandardCharsets;
+
+import static org.junit.Assert.assertEquals;
+
+public class ChecksumTest {
+
+    @Test
+    public void testCrc8() {
+        ByteBuf buf = Unpooled.copiedBuffer("123456789", StandardCharsets.US_ASCII);
+
+        assertEquals(0xF7, Checksum.crc8(Checksum.CRC8_EGTS, buf.nioBuffer()));
+        assertEquals(0xD0, Checksum.crc8(Checksum.CRC8_ROHC, buf.nioBuffer()));
+    }
+
+    @Test
+    public void testCrc16() {
+        ByteBuf buf = Unpooled.copiedBuffer("123456789", StandardCharsets.US_ASCII);
+
+        assertEquals(0xBB3D, Checksum.crc16(Checksum.CRC16_IBM, buf.nioBuffer()));
+        assertEquals(0x4B37, Checksum.crc16(Checksum.CRC16_MODBUS, buf.nioBuffer()));
+        assertEquals(0x906e, Checksum.crc16(Checksum.CRC16_X25, buf.nioBuffer()));
+        assertEquals(0x29b1, Checksum.crc16(Checksum.CRC16_CCITT_FALSE, buf.nioBuffer()));
+        assertEquals(0x2189, Checksum.crc16(Checksum.CRC16_KERMIT, buf.nioBuffer()));
+        assertEquals(0x31c3, Checksum.crc16(Checksum.CRC16_XMODEM, buf.nioBuffer()));
+    }
+
+    @Test
+    public void testLuhn() {
+        assertEquals(7, Checksum.luhn(12345678901234L));
+        assertEquals(0, Checksum.luhn(63070019470771L));
+    }
+
+}