johnzon-mapper/src/test/java/org/apache/johnzon/mapper/MapingsKeyCacheForParameterizedTypesTest.java

/*
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 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you 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
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 * Unless required by applicable law or agreed to in writing,
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package org.apache.johnzon.mapper;

import org.apache.johnzon.mapper.reflection.JohnzonParameterizedType;
import org.junit.Test;

import java.util.Collection;

import static junit.framework.TestCase.assertEquals;

public class MapingsKeyCacheForParameterizedTypesTest {
    // before the fix: java.lang.ClassCastException:
    // MapingsKeyCacheForParameterizedTypesTest$Salmon cannot be cast to MapingsKeyCacheForParameterizedTypesTest$Fish
    @Test
    public void ensureParameterizedTypeDontEndUpOnClass() {
        try (final Mapper mapper = new MapperBuilder().build()) {
            final Foo<Salmon> salmons = mapper.readObject("{\"bars\":[{}]}", new JohnzonParameterizedType(Foo.class, Salmon.class));
            assertEquals(Salmon.class, salmons.bars.iterator().next().getClass());
            final Foo<Fish> fishes = mapper.readObject("{\"bars\":[{}]}", new JohnzonParameterizedType(Foo.class, Fish.class));
            assertEquals(Fish.class, fishes.bars.iterator().next().getClass());
        }
    }

    public static class Foo<Bar> {
        public Collection<Bar> bars;
    }

    public static class Salmon /*NO INHERITANCE*/ {
    }

    public static class Fish /*NO INHERITANCE*/ {
    }
}