extras/kafka.connect/api/src/test/java/org/apache/rya/kafka/connect/api/StatementsSerdeTest.java

/**
 * 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 org.apache.rya.kafka.connect.api;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;

import java.util.Set;

import org.apache.kafka.common.serialization.Serde;
import org.eclipse.rdf4j.model.Statement;
import org.eclipse.rdf4j.model.ValueFactory;
import org.eclipse.rdf4j.model.impl.SimpleValueFactory;
import org.junit.Test;

import com.google.common.collect.Sets;

/**
 * Unit tests the methods of {@link StatementsSerde}.
 */
public class StatementsSerdeTest {

    @Test
    public void serializeAndDeserialize() {
        // Create the object that will be serialized.
        final ValueFactory vf = SimpleValueFactory.getInstance();

        final Set<Statement> original = Sets.newHashSet(
                vf.createStatement(
                        vf.createIRI("urn:alice"),
                        vf.createIRI("urn:talksTo"),
                        vf.createIRI("urn:bob"),
                        vf.createIRI("urn:testGraph")),
                vf.createStatement(
                        vf.createIRI("urn:bob"),
                        vf.createIRI("urn:talksTo"),
                        vf.createIRI("urn:charlie"),
                        vf.createIRI("urn:graph2")),
                vf.createStatement(
                        vf.createIRI("urn:charlie"),
                        vf.createIRI("urn:talksTo"),
                        vf.createIRI("urn:bob"),
                        vf.createIRI("urn:graph2")),
                vf.createStatement(
                        vf.createIRI("urn:alice"),
                        vf.createIRI("urn:listensTo"),
                        vf.createIRI("urn:charlie"),
                        vf.createIRI("urn:testGraph")));

        // Serialize it.
        try(final Serde<Set<Statement>> serde = new StatementsSerde()) {
            final byte[] bytes = serde.serializer().serialize("topic", original);

            // Deserialize it.
            final Set<Statement> deserialized = serde.deserializer().deserialize("topic", bytes);

            // Show the deserialized value matches the original.
            assertEquals(original, deserialized);
        }
    }

    @Test
    public void deserializeEmptyData() {
        try(final Serde<Set<Statement>> serde = new StatementsSerde()) {
            assertNull( serde.deserializer().deserialize("topic", new byte[0]) );
        }
    }
}