src/test/java/com/fasterxml/jackson/databind/ser/TestExceptionSerialization.java

package com.fasterxml.jackson.databind.ser;

import java.util.*;

import com.fasterxml.jackson.databind.*;

/**
 * Unit tests for verifying that simple exceptions can be serialized.
 */
public class TestExceptionSerialization
    extends BaseMapTest
{
    /*
    /**********************************************************
    /* Tests
    /**********************************************************
     */

    public void testSimple() throws Exception
    {
        ObjectMapper mapper = new ObjectMapper();
        String TEST = "test exception";
        Map<String,Object> result = writeAndMap(mapper, new Exception(TEST));
        // JDK 7 has introduced a new property 'suppressed' to Throwable
        Object ob = result.get("suppressed");
        if (ob != null) {
            assertEquals(5, result.size());
        } else {
            assertEquals(4, result.size());
        }

        assertEquals(TEST, result.get("message"));
        assertNull(result.get("cause"));
        assertEquals(TEST, result.get("localizedMessage"));

        // hmmh. what should we get for stack traces?
        Object traces = result.get("stackTrace");
        if (!(traces instanceof List<?>)) {
            fail("Expected a List for exception member 'stackTrace', got: "+traces);
        }
    }
}