/*
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*
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* FITNESS FOR A PARTICULAR PURPOSE . See the GNU General Public License
* version 2 for more details ( a copy is included in the LICENSE file that
* accompanied this code ) .
*
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* 2 along with this work ; if not , write to the Free Software Foundation ,
* Inc . , 51 Franklin St , Fifth Floor , Boston , MA 02110 - 1301 USA .
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* questions .
*/
/* @test
@ bug 4403848 6348426 6407730
@ summary Check correctness of the UTF - 16 converter in all its flavors
*/
import java.io.IOException;
import java.nio.BufferOverflowException;
import java.nio.*;
import java.nio.charset.*;
public class TestUTF_16 {
private static void testDecode(String charset,
String expected,
byte [] input)
throws Exception
{
String out = new String(input, charset);
if (!out.equals(expected)) {
failureReport (out, expected);
throw new Exception("UTF_16 Decoding test failed " + charset);
}
}
private static void testEncode(String charset,
String input,
byte [] expected)
throws Exception
{
byte [] testBytes = input.getBytes(charset);
for (int i = 0 ; i< expected.length; i++)
if (testBytes[i] != expected[i])
throw new Exception("UTF_16 Encoding test failed " + charset);
}
private static void warn(String s) {
System.err.println("FAILED Test 4403848 UTF-16" +
s) ;
}
private static void failureReport(String testStr,
String expected) {
System.err.println ("Expected Characters:" );
for (int i = 0 ; i < expected.length() ; i++) {
warn("expected char[" + i + "] : " +
Integer.toHexString((int )expected.charAt(i)) +
"obtained char[" + i + "] : " +
Integer.toHexString((int )testStr.charAt(i)));
}
}
/*
private static void checkResult ( char [ ] expected ,
String testStr ,
String testName )
throws Exception
{
if ( testStr . length ( ) ! = expected . length )
failureReport ( testStr , expected ) ;
for ( int i = 0 ; i < testStr . length ( ) ; i + + ) {
if ( testStr . charAt ( i ) ! = expected [ i ] ) {
failureReport ( testStr , expected ) ;
throw new Exception ( " REGTEST TestUTF16 failed : "
+ testName ) ;
}
}
System . err . println ( " Test " + testName + " PASSED " ) ;
return ;
}
*/
private static void test() throws Exception {
// Tests: Check decoding of UTF-16.
// Ensures correct endian polarity
// of the decoders and appropriate
// interpretation of BOM bytes where
// they are required.
// Test 1: BigEndian UTF-16 Decoding
testDecode("UTF_16BE" , "\u0092\u0093" ,
new byte [] { (byte ) 0 x00, (byte ) 0 x92,
(byte ) 0 x00, (byte ) 0 x93 });
// Test 1a: BigEndian UTF-16 Decoding. BOM bytes provided.
testDecode("UTF_16BE" , "\ufeff\u0092\u0093" ,
new byte [] { (byte ) 0 xfe, (byte ) 0 xff,
(byte ) 0 x00, (byte ) 0 x92,
(byte ) 0 x00, (byte ) 0 x93 });
testDecode("UTF_16LE" , "\u9200\u9300" ,
new byte [] { (byte ) 0 x00, (byte ) 0 x92,
(byte ) 0 x00, (byte ) 0 x93 });
// Test 2a: LittleEndian UTF-16 Decoding, BOM bytes provided.
testDecode("UTF_16LE" , "\ufeff\u9200\u9300" ,
new byte [] { (byte ) 0 xff, (byte ) 0 xfe,
(byte ) 0 x00, (byte ) 0 x92,
(byte ) 0 x00, (byte ) 0 x93 });
// Test 3: UTF-16 (with mandatory byte order mark) Decoding
testDecode("UTF-16" , "\u9200\u9300" ,
new byte [] { (byte ) 0 xfe, (byte ) 0 xff,
(byte ) 0 x92, (byte ) 0 x00,
(byte ) 0 x93, (byte ) 0 x00 });
// Test 3a: UTF-16 BOM omitted. This should decode OK.
testDecode("UTF-16" , "\u9200\u9300" ,
new byte [] { (byte ) 0 x92, (byte ) 0 x00,
(byte ) 0 x93, (byte ) 0 x00 });
// Test 4: encoding using UTF-16
// BOM must be emitted when encoding and must be BigEndian.
testEncode("UTF-16" , "\u0123" ,
new byte [] { (byte ) 0 xfe, (byte ) 0 xff,
(byte ) 0 x01, (byte ) 0 x23 });
// Test 5:
if (CoderResult.OVERFLOW !=
Charset.forName("UTF_16" )
.newDecoder()
.decode((ByteBuffer.allocate(4 )
.put(new byte []
{(byte )0 xd8,(byte )0 x00,
(byte )0 xdc,(byte )0 x01})
.flip()),
CharBuffer.allocate(1 ),
true )) {
throw new Exception ("REGTEST TestUTF16 Overflow test failed" );
}
// Test 6: decoding using UTF_16LE_BOM/UnicodeLittle
// UnicodeLittle should accept non-BOM byte sequence
testDecode("UnicodeLittle" , "Arial" ,
new byte [] { 'A' , 0 , 'r' , 0 , 'i' , 0 , 'a' , 0 , 'l' , 0 });
System.err.println ("\nPASSED UTF-16 encoder test" );
// Reversed BOM in middle of stream Negative test.
/*
boolean caughtException = false ;
try {
String out = new String ( new byte [ ] { ( byte ) 0 x00 ,
( byte ) 0 x92 ,
( byte ) 0 xff ,
( byte ) 0 xfe } ,
" UTF - 16 " ) ;
} catch ( IOException e ) { caughtException = true ; }
if ( caughtException = = false )
throw new Exception ( " Incorrectly parsed BOM in middle of input " ) ;
*/
// Fixed included with bug 4403848 fixes buffer sizing
// issue due to non provision of additional 2 bytes
// headroom for initial BOM bytes for UTF-16 encoding.
System.err.println ("OVERALL PASS OF UTF-16 Test" );
}
public static void main (String[] args) throws Exception {
test();
}
}
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