lang/java/reef-tang/tang/src/test/java/org/apache/reef/tang/test/RoundTripTest.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
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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
 *
 * Unless required by applicable law or agreed to in writing,
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package org.apache.reef.tang.test;

import org.apache.reef.tang.ClassHierarchy;
import org.apache.reef.tang.Configuration;
import org.apache.reef.tang.Tang;
import org.apache.reef.tang.implementation.avro.AvroClassHierarchySerializer;
import org.junit.Assert;
import org.junit.Test;

/**
 * Base class for roundtrip tests. The idea is that serializers implement roundTrip() and then get tested by the tests
 * in this class.
 */
public abstract class RoundTripTest {

  public abstract Configuration roundTrip(Configuration configuration) throws Exception;

  public abstract Configuration roundTrip(Configuration configuration, ClassHierarchy classHierarchy)
      throws Exception;

  @Test
  public void testRoundTrip() throws Exception {
    // TODO[JIRA REEF-1009]: use 'getConfiguration' instead of 'getConfigurationWithoutList' after REEF-402 is fixed
    final Configuration conf = ObjectTreeTest.getConfigurationWithoutList();
    final RootInterface before = Tang.Factory.getTang().newInjector(conf).getInstance(RootInterface.class);
    final RootInterface after = Tang.Factory.getTang().newInjector(roundTrip(conf)).getInstance(RootInterface.class);
    Assert.assertEquals("Configuration conversion to and from Avro datatypes failed.", before, after);
  }

  @Test
  public void testRoundTripWithClassHierarchy() throws Exception {
    // TODO[JIRA REEF-1009]: use 'getConfiguration' instead of 'getConfigurationWithoutList' after REEF-402 is fixed
    final Configuration confBefore = ObjectTreeTest.getConfigurationWithoutList();
    final AvroClassHierarchySerializer chSerializer = new AvroClassHierarchySerializer();
    final ClassHierarchy c = chSerializer.fromAvro(chSerializer.toAvro(confBefore.getClassHierarchy()));
    final Configuration confAfter = roundTrip(confBefore, c);
    Assert.assertEquals(confBefore.getNamedParameters().size(), confAfter.getNamedParameters().size());
    //For now, we cannot use ProtocolBufferClassHierarchy to do injection
  }
}