compiler/test/src/test/java/org/apache/nemo/compiler/optimizer/pass/compiletime/reshaping/LoopUnrollingPassTest.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.nemo.compiler.optimizer.pass.compiletime.reshaping;

import org.apache.nemo.client.JobLauncher;
import org.apache.nemo.common.Pair;
import org.apache.nemo.common.ir.IRDAG;
import org.apache.nemo.common.ir.vertex.IRVertex;
import org.apache.nemo.compiler.CompilerTestUtil;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.powermock.core.classloader.annotations.PrepareForTest;
import org.powermock.modules.junit4.PowerMockRunner;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import static org.junit.Assert.assertEquals;

/**
 * Test {@link LoopUnrollingPass}.
 */
@RunWith(PowerMockRunner.class)
@PrepareForTest(JobLauncher.class)
public class LoopUnrollingPassTest {
  private IRDAG compiledDAG;

  @Before
  public void setUp() throws Exception {
    compiledDAG = CompilerTestUtil.compileALSDAG();
  }

  @Test
  public void testLoopUnrollingPass() throws Exception {
    final IRDAG processedDAG =
      new LoopUnrollingPass().apply(new LoopExtractionPass().apply(compiledDAG));

    assertEquals(compiledDAG.getTopologicalSort().size(), processedDAG.getTopologicalSort().size());
    // zip vertices
    final Iterator<IRVertex> vertices1 = compiledDAG.getTopologicalSort().iterator();
    final Iterator<IRVertex> vertices2 = processedDAG.getTopologicalSort().iterator();
    final List<Pair<IRVertex, IRVertex>> list = new ArrayList<>();
    while (vertices1.hasNext() && vertices2.hasNext()) {
      list.add(Pair.of(vertices1.next(), vertices2.next()));
    }
    list.forEach(irVertexPair -> {
      assertEquals(irVertexPair.left().getExecutionProperties(), irVertexPair.right().getExecutionProperties());
      assertEquals(compiledDAG.getIncomingEdgesOf(irVertexPair.left()).size(),
        processedDAG.getIncomingEdgesOf(irVertexPair.right()).size());
    });
  }
}