com.cedarsoft.serialization.test.utils.AbstractSerializerTest2.java Source code

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Here is the source code for com.cedarsoft.serialization.test.utils.AbstractSerializerTest2.java

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/**
 * Copyright (C) cedarsoft GmbH.
 *
 * Licensed under the GNU General Public License version 3 (the "License")
 * with Classpath Exception; you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 *         http://www.cedarsoft.org/gpl3ce
 *         (GPL 3 with Classpath Exception)
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 3 only, as
 * published by the Free Software Foundation. cedarsoft GmbH designates this
 * particular file as subject to the "Classpath" exception as provided
 * by cedarsoft GmbH in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 3 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 3 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact cedarsoft GmbH, 72810 Gomaringen, Germany,
 * or visit www.cedarsoft.com if you need additional information or
 * have any questions.
 */

package com.cedarsoft.serialization.test.utils;

import com.cedarsoft.serialization.Serializer;
import com.cedarsoft.serialization.StreamSerializer;
import org.apache.commons.io.IOUtils;
import org.junit.experimental.theories.*;
import org.junit.runner.*;

import javax.annotation.Nonnull;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;

import static org.hamcrest.CoreMatchers.*;
import static org.junit.Assert.*;

/**
 * Abstract base class for serializer tests.
 *
 * @param <T> the type of domain object
 */
@RunWith(Theories.class)
public abstract class AbstractSerializerTest2<T> {
    @Theory
    public void testSerializer(@Nonnull Entry<?> entry) throws Exception {
        Serializer<T, OutputStream, InputStream> serializer = getSerializer();

        //Serialize
        byte[] serialized = serialize(serializer, (T) entry.getObject());

        //Verify
        verifySerialized((Entry<T>) entry, serialized);

        verifyDeserialized(serializer.deserialize(new ByteArrayInputStream(serialized)), (T) entry.getObject());
    }

    @Nonnull
    protected byte[] serialize(@Nonnull Serializer<T, OutputStream, InputStream> serializer,
            @Nonnull T objectToSerialize) throws IOException {
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        serializer.serialize(objectToSerialize, out);
        return out.toByteArray();
    }

    protected abstract void verifySerialized(@Nonnull Entry<T> entry, @Nonnull byte[] serialized) throws Exception;

    /**
     * Returns the serializer
     *
     * @return the serializer
     */
    @Nonnull
    protected abstract Serializer<T, OutputStream, InputStream> getSerializer() throws Exception;

    /**
     * Verifies the deserialized object
     *
     * @param deserialized the deserialized object
     * @param original     the original
     */
    protected void verifyDeserialized(@Nonnull T deserialized, @Nonnull T original) {
        assertEquals(original, deserialized);
        assertThat(deserialized, is(new ReflectionEquals(original)));
    }

    @Nonnull
    public static <T> Entry<? extends T> create(@Nonnull T object, @Nonnull byte[] expected) {
        return new Entry<T>(object, expected);
    }

    @Nonnull
    public static <T> Entry<? extends T> create(@Nonnull T object, @Nonnull URL expected) {
        try {
            return new Entry<T>(object, IOUtils.toByteArray(expected.openStream()));
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    @Nonnull
    public static <T> Entry<? extends T> create(@Nonnull T object, @Nonnull InputStream expected) {
        try {
            return new Entry<T>(object, IOUtils.toByteArray(expected));
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }
}