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diff --git a/src/net/gcdc/asn1/test/UperEncodeStringTest.java b/src/net/gcdc/asn1/test/UperEncodeStringTest.java
new file mode 100644
index 0000000..521075c
--- /dev/null
+++ b/src/net/gcdc/asn1/test/UperEncodeStringTest.java
@@ -0,0 +1,95 @@
+package net.gcdc.asn1.test;
+
+import static org.junit.Assert.assertEquals;
+
+import java.util.logging.Level;
+
+import net.gcdc.asn1.datatypes.Asn1Optional;
+import net.gcdc.asn1.datatypes.CharacterRestriction;
+import net.gcdc.asn1.datatypes.RestrictedString;
+import net.gcdc.asn1.datatypes.Sequence;
+
+import net.gcdc.asn1.uper.UperEncoder;
+
+import org.junit.Test;
+
+
+public class UperEncodeStringTest {
+
+    /**
+     * Example from the Standard on UPER.
+     <pre>
+        World-Schema DEFINITIONS AUTOMATIC TAGS ::= 
+        BEGIN
+        TestRecord ::= [APPLICATION 0] IMPLICIT SEQUENCE {
+            testString1 UTF8String OPTIONAL,
+            testString2 IA5String OPTIONAL
+         }                                   
+        END
+    </pre>
+     */
+    @Sequence
+    public static class TestRecord {
+    	
+    	@RestrictedString(CharacterRestriction.UTF8String)
+    	@Asn1Optional() String valueUtf8;
+    	
+    	@RestrictedString(CharacterRestriction.IA5String)
+    	@Asn1Optional() String valueIA5;
+
+        public TestRecord() {
+        }
+
+        public TestRecord(String utf8, String ia5) {
+        	this.valueUtf8 = utf8;
+        	this.valueIA5  = ia5;
+        }
+    }
+
+
+    @Test public void testEncode() throws IllegalArgumentException, IllegalAccessException {
+        TestRecord record = new TestRecord("Müller", "Meier");
+        byte[] encoded = UperEncoder.encode(record);
+        String hex = UperEncoder.hexStringFromBytes(encoded);
+        UperEncoder.logger.log(Level.FINEST,String.format("data hex: %s", hex));
+        assertEquals("C1D370EF1B1B195C8166E5D39790",hex); 
+    }
+    
+    @Test public void testEncodeUtf8() throws IllegalArgumentException, IllegalAccessException {
+        TestRecord record = new TestRecord("你好吗", "Meier");
+        byte[] encoded = UperEncoder.encode(record);
+        String hex = UperEncoder.hexStringFromBytes(encoded);
+        UperEncoder.logger.log(Level.FINEST,String.format("data hex: %s", hex));
+        assertEquals("C2792F6839696F796425C166E5D39790",hex); 
+    }
+    
+
+    
+    @Test public void testDecode() throws IllegalArgumentException, IllegalAccessException {
+        TestRecord record = new TestRecord("Müller", "Meier");
+        byte[] encoded = UperEncoder.encode(record);
+        String hex = UperEncoder.hexStringFromBytes(encoded);
+        UperEncoder.logger.log(Level.FINEST,String.format("data hex: %s", hex));
+        assertEquals("C1D370EF1B1B195C8166E5D39790",hex); 
+        TestRecord result = UperEncoder.decode(encoded, TestRecord.class);
+        assertEquals(result.valueUtf8,record.valueUtf8); 
+        assertEquals(result.valueIA5,record.valueIA5); 
+    } 
+    
+    
+    @Test public void testDecodeUtf8() throws IllegalArgumentException, IllegalAccessException {
+        TestRecord record = new TestRecord("你好吗", "Meier");
+        byte[] encoded = UperEncoder.encode(record);
+        String hex = UperEncoder.hexStringFromBytes(encoded);
+        UperEncoder.logger.log(Level.FINEST,String.format("data hex: %s", hex));
+        assertEquals("C2792F6839696F796425C166E5D39790",hex);  
+        TestRecord result = UperEncoder.decode(encoded, TestRecord.class);
+        assertEquals(result.valueUtf8,record.valueUtf8); 
+        assertEquals(result.valueIA5,record.valueIA5); 
+    }
+    
+    
+    
+    
+
+}