flink-tests/src/test/java/org/apache/flink/test/example/scala/ConnectedComponentsITCase.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.flink.test.example.scala;

import org.apache.flink.examples.scala.graph.ConnectedComponents;
import org.apache.flink.test.testdata.ConnectedComponentsData;
import org.apache.flink.test.util.JavaProgramTestBase;

import java.io.BufferedReader;

/** Test for {@link ConnectedComponents}. */
public class ConnectedComponentsITCase extends JavaProgramTestBase {

    private static final long SEED = 0xBADC0FFEEBEEFL;

    private static final int NUM_VERTICES = 1000;

    private static final int NUM_EDGES = 10000;

    private String verticesPath;
    private String edgesPath;
    private String resultPath;

    @Override
    protected void preSubmit() throws Exception {
        verticesPath =
                createTempFile(
                        "vertices.txt",
                        ConnectedComponentsData.getEnumeratingVertices(NUM_VERTICES));
        edgesPath =
                createTempFile(
                        "edges.txt",
                        ConnectedComponentsData.getRandomOddEvenEdges(
                                NUM_EDGES, NUM_VERTICES, SEED));
        resultPath = getTempFilePath("results");
    }

    @Override
    protected void testProgram() throws Exception {
        ConnectedComponents.main(
                new String[] {
                    "--vertices", verticesPath,
                    "--edges", edgesPath,
                    "--output", resultPath,
                    "--iterations", "100"
                });
    }

    @Override
    protected void postSubmit() throws Exception {
        for (BufferedReader reader : getResultReader(resultPath)) {
            ConnectedComponentsData.checkOddEvenResult(reader);
        }
    }
}