test/jdk/java/text/Format/ChoiceFormat/Bug4185732Test.java

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/*
 * @test
 * @bug 4185732
 * @library /java/text/testlib
 * @build HexDumpReader
 * @summary Test that ChoiceFormat invariants are preserved across serialization.
 *          This test depends on Bug4185732.ser.txt and will fail otherwise.
 * @run junit Bug4185732Test
 */

import java.io.InvalidObjectException;
import java.io.ObjectInputStream;
import java.text.ChoiceFormat;

import org.junit.jupiter.api.Test;

import static org.junit.jupiter.api.Assertions.fail;

public class Bug4185732Test {

    /*
     * The ChoiceFormat class requires that its choiceFormats and choiceLimits
     * arrays have the same length. This test ensures that the invariant is enforced
     * during the readObject() call.
     */
    @Test
    public void choiceFormatSerializationInvariantsTest() {
        try {
            // A serialized ChoiceFormat with unequal formats and limits
            final ObjectInputStream in
                = new ObjectInputStream(HexDumpReader.getStreamFromHexDump("Bug4185732.ser.txt"));
            final ChoiceFormat loc = (ChoiceFormat)in.readObject();
            if (loc.getFormats().length != loc.getLimits().length) {
                fail("ChoiceFormat did not properly check stream");
            } else {
                // for some reason, the data file was VALID.  This test
                // requires a corrupt data file the format and limit
                // arrays are of different length.
                fail("Test data file was not properly created");
            }
        } catch (InvalidObjectException expectedException) {
            // Expecting an IOE
        } catch (Exception wrongException) {
            fail("Expected an InvalidObjectException, instead got: " + wrongException);
        }
    }
}