com.gemstone.gemfire.test.junit.rules.serializable.SerializableExternalResourceTest.java Source code

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Here is the source code for com.gemstone.gemfire.test.junit.rules.serializable.SerializableExternalResourceTest.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file 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
 *
 * 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.gemstone.gemfire.test.junit.rules.serializable;

import static org.assertj.core.api.Assertions.*;

import com.gemstone.gemfire.test.junit.categories.UnitTest;
import org.apache.commons.lang.SerializationUtils;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.junit.rules.ExternalResource;

import java.io.Serializable;
import java.lang.reflect.Field;
import java.util.Arrays;

/**
 * Unit tests for {@link SerializableExternalResource}.
 */
@Category(UnitTest.class)
public class SerializableExternalResourceTest {

    @Test
    public void hasZeroFields() throws Exception {
        Field[] fields = ExternalResource.class.getDeclaredFields();
        assertThat(fields.length).as("Fields: " + Arrays.asList(fields)).isEqualTo(0);
    }

    @Test
    public void isSerializable() throws Exception {
        assertThat(SerializableExternalResource.class).isInstanceOf(Serializable.class);
    }

    @Test
    public void canBeSerialized() throws Throwable {
        FakeSerializableExternalResource instance = new FakeSerializableExternalResource().value(1);

        FakeSerializableExternalResource cloned = (FakeSerializableExternalResource) SerializationUtils
                .clone(instance);

        assertThat(instance.value()).isEqualTo(1);
        assertThat(cloned.value()).isEqualTo(1);

        instance.value(2);

        assertThat(instance.value()).isEqualTo(2);
        assertThat(cloned.value()).isEqualTo(1);
    }

    /**
     * Fake SerializableExternalResource with a simple int field.
     */
    private static class FakeSerializableExternalResource extends SerializableExternalResource {

        private int value = -1;

        public FakeSerializableExternalResource value(final int value) {
            this.value = value;
            return this;
        }

        public int value() {
            return this.value;
        }
    }
}