1 files changed, 18 insertions, 3 deletions
diff --git a/test/org/traccar/helper/ChecksumTest.java b/test/org/traccar/helper/ChecksumTest.java
index ad112b940..a2e69eb5a 100644
--- a/test/org/traccar/helper/ChecksumTest.java
+++ b/test/org/traccar/helper/ChecksumTest.java
@@ -1,16 +1,31 @@
 package org.traccar.helper;
 
+import org.jboss.netty.buffer.ChannelBuffer;
+import org.jboss.netty.buffer.ChannelBuffers;
 import org.junit.Assert;
 import org.junit.Test;
 
+import java.nio.charset.Charset;
+
 public class ChecksumTest {
-    
+
     @Test
-    public void testLuhnChecksum() {
+    public void testCrc16() {
+        ChannelBuffer buf = ChannelBuffers.copiedBuffer("123456789", Charset.defaultCharset());
 
+        Assert.assertEquals(0x906e, Checksum.crc16(Checksum.CRC16_X25, buf.toByteBuffer()));
+        Assert.assertEquals(0x29b1, Checksum.crc16(Checksum.CRC16_CCITT_FALSE, buf.toByteBuffer()));
+        Assert.assertEquals(0x2189, Checksum.crc16(Checksum.CRC16_KERMIT, buf.toByteBuffer()));
+        Assert.assertEquals(0x31c3, Checksum.crc16(Checksum.CRC16_XMODEM, buf.toByteBuffer()));
+        Assert.assertEquals(0xe5cc, Checksum.crc16(Checksum.CRC16_AUG_CCITT, buf.toByteBuffer()));
+        Assert.assertEquals(0xd64e, Checksum.crc16(Checksum.CRC16_GENIBUS, buf.toByteBuffer()));
+        Assert.assertEquals(0x6f91, Checksum.crc16(Checksum.CRC16_MCRF4XX, buf.toByteBuffer()));
+    }
+    
+    @Test
+    public void testLuhn() {
         Assert.assertEquals(7, Checksum.luhn(12345678901234L));
         Assert.assertEquals(0, Checksum.luhn(63070019470771L));
-
     }
 
 }