com.github.nmorel.gwtjackson.client.mapper.ErrorGwtTest.java Source code

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Here is the source code for com.github.nmorel.gwtjackson.client.mapper.ErrorGwtTest.java

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/*
 * Copyright 2014 Nicolas Morel
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.github.nmorel.gwtjackson.client.mapper;

import java.util.Comparator;
import java.util.HashMap;
import java.util.Map;

import com.fasterxml.jackson.annotation.JsonTypeInfo;
import com.fasterxml.jackson.annotation.JsonTypeInfo.Id;
import com.github.nmorel.gwtjackson.client.GwtJacksonTestCase;
import com.github.nmorel.gwtjackson.client.ObjectMapper;
import com.github.nmorel.gwtjackson.client.annotation.JsonMixIns;
import com.github.nmorel.gwtjackson.client.annotation.JsonMixIns.JsonMixIn;
import com.google.gwt.core.client.GWT;

/**
 * A test that forces errors in order to test if gwt-jackson gracefully fallback and does not generate compilation error.
 *
 * @author Nicolas Morel
 */
public class ErrorGwtTest extends GwtJacksonTestCase {

    /**
     * A private subtype of comparator to be sure it is ignored.
     *
     * @param <T>
     */
    private static class PrivateComparator<T> implements Comparator<T> {

        @Override
        public int compare(T o1, T o2) {
            return 1;
        }
    }

    @JsonMixIns(@JsonMixIn(target = Comparator.class, mixIn = MixinCom.class))
    public interface ComparatorIntegerMapper extends ObjectMapper<Comparator<Integer>> {

        static ComparatorIntegerMapper INSTANCE = GWT.create(ComparatorIntegerMapper.class);
    }

    @JsonTypeInfo(use = Id.CLASS)
    public static class MixinCom {
    }

    public void testSerialization() {
        // Using a class inside java.* package to test we don't generate the mapper inside it because it is prohibited by java.
        ComparatorIntegerMapper.INSTANCE.write(new Comparator<Integer>() {
            @Override
            public int compare(Integer o1, Integer o2) {
                return 0;
            }
        });
    }

    // #############################################
    // No errors if a type is not supported, we just ignore the property

    public static class UnsupportedTypeBean {
        public String aProperty;
        public String[][][] array3d;
        public Map<UnsupportedTypeBean, String> aMap;
    }

    public interface UnsupportedTypeBeanMapper extends ObjectMapper<UnsupportedTypeBean> {
        static UnsupportedTypeBeanMapper INSTANCE = GWT.create(UnsupportedTypeBeanMapper.class);
    }

    public void testMapKeyError() {
        UnsupportedTypeBean bean = new UnsupportedTypeBean();
        bean.aProperty = "propertyString";
        bean.array3d = new String[][][] {};
        bean.aMap = new HashMap<UnsupportedTypeBean, String>();

        String json = UnsupportedTypeBeanMapper.INSTANCE.write(bean);
        assertEquals("{\"aProperty\":\"propertyString\"}", json);

        bean = UnsupportedTypeBeanMapper.INSTANCE
                .read("{\"aProperty\":\"propertyString\",\"array3d\":\"error\",\"aMap\":\"error\"}");
        assertEquals("propertyString", bean.aProperty);
        assertNull(bean.array3d);
        assertNull(bean.aMap);
    }

}