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package javax.mail.internet;
import java.io.File;
import java.util.Set;
import java.util.HashSet;
import andx.activation.*;
import javax.mail.util.ByteArrayDataSource;
import org.junit.*;
import static org.junit.Assert.*;
/**
* Test MimeUtility methods.
*
* XXX - just a beginning...
*
* @author Bill Shannon
*/
public class MimeUtilityTest {
private static final byte[] utf16beBytes = {
(byte)0xfe, (byte)0x5b, (byte)0xdc, (byte)0x5f,
(byte)0x92, (byte)0x30, (byte)0x88, (byte)0x30,
(byte)0x8d, (byte)0x30, (byte)0x57, (byte)0x30,
(byte)0x4f, (byte)0x30, (byte)0x4a, (byte)0x30,
(byte)0x6d, (byte)0x30, (byte)0x4c, (byte)0x30,
(byte)0x44, (byte)0x30, (byte)0x57, (byte)0x30,
(byte)0x7e, (byte)0x30, (byte)0x59, (byte)0x30,
(byte)0x0d, (byte)0x00, (byte)0x0a, (byte)0x00
};
private static final Set encodings = new HashSet() {{
add("7bit"); add("8bit"); add("quoted-printable"); add("base64"); }};
/**
* Test that utf-16be data is encoded with base64 and not quoted-printable.
*/
@Test
public void testNonAsciiEncoding() throws Exception {
DataSource ds = new ByteArrayDataSource(utf16beBytes,
"text/plain; charset=utf-16be");
String en = MimeUtility.getEncoding(ds);
assertEquals("non-ASCII encoding", "base64", en);
}
/**
* Test that getEncoding returns a valid value even if the file
* doesn't exist. The return value should be a valid
* Content-Transfer-Encoding, but mostly we care that it doesn't
* throw NullPointerException.
*/
@Test
public void getEncodingMissingFile() throws Exception {
File missing = new File(getClass().getName());
assertFalse(missing.toString(), missing.exists());
FileDataSource fds = new FileDataSource(missing);
assertEquals(fds.getName(), missing.getName());
assertTrue("getEncoding(DataSource)",
encodings.contains(MimeUtility.getEncoding(fds)));
assertTrue("getEncoding(DataHandler)",
encodings.contains(MimeUtility.getEncoding(new DataHandler(fds))));
}
/**
* Test that getEncoding returns a valid value even if the content
* type is bad. The return value should be a valid
* Content-Transfer-Encoding, but mostly we care that it doesn't
* throw NullPointerException.
*/
@Test
public void getEncodingBadContent() throws Exception {
String content = "bad-content-type";
ContentType type = null;
try {
type = new ContentType(content);
fail(type.toString());
} catch (ParseException expect) {
if (type != null) {
throw expect;
}
}
ByteArrayDataSource bads = new ByteArrayDataSource("", content);
bads.setName(null);
assertTrue(encodings.contains(MimeUtility.getEncoding(bads)));
assertTrue(encodings.contains(
MimeUtility.getEncoding(new DataHandler(bads))));
bads.setName("");
assertTrue(encodings.contains(MimeUtility.getEncoding(bads)));
assertTrue(encodings.contains(
MimeUtility.getEncoding(new DataHandler(bads))));
bads.setName(getClass().getName());
assertTrue(encodings.contains(MimeUtility.getEncoding(bads)));
assertTrue(encodings.contains(
MimeUtility.getEncoding(new DataHandler(bads))));
}
/**
* Test that encoding a Unicode string with surrogate pairs
* doesn't split the encoding between the pairs.
*/
@Test
public void testSurrogatePairs() throws Exception {
// test a specific case
String sp = "a" +
"\ud801\udc00\ud801\udc00\ud801\udc00\ud801\udc00" +
"\ud801\udc00\ud801\udc00\ud801\udc00\ud801\udc00" +
"\ud801\udc00\ud801\udc00\ud801\udc00\ud801\udc00" +
"\ud801\udc00\ud801\udc00\ud801\udc00\ud801\udc00";
String en = MimeUtility.encodeText(sp, "utf-8", "B");
String dt = MimeUtility.decodeText(en);
// encoding it and decoding it shouldn't change it
assertEquals(dt, sp);
String[] w = en.split(" ");
// the first word should end with the second half of a pair
String dw = MimeUtility.decodeWord(w[0]);
assertTrue(dw.charAt(dw.length()-1) == '\udc00');
// and the second word should start with the first half of a pair
dw = MimeUtility.decodeWord(w[1]);
assertTrue(dw.charAt(0) == '\ud801');
// test various string lengths
int ch = 0xFE000;
String test = "";
for (int i = 0; i < 50; i++) {
test += new String(Character.toChars(ch));
String encoded = MimeUtility.encodeText(test, "UTF-8", "B");
String decoded = MimeUtility.decodeText(encoded);
assertEquals(decoded, test);
}
}
}