/**
* 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
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package org.apache.mahout.ga.watchmaker.cd.hadoop;
import java.util.List;
import java.util.Random;
import com.google.common.collect.Lists;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.mahout.common.RandomUtils;
import org.apache.mahout.examples.MahoutTestCase;
import org.apache.mahout.ga.watchmaker.cd.CDFitness;
import org.apache.mahout.ga.watchmaker.cd.Rule;
import org.apache.mahout.ga.watchmaker.cd.utils.RandomRule;
import org.apache.mahout.ga.watchmaker.cd.utils.RandomRuleResults;
import com.google.common.io.Resources;
import org.junit.Test;
public final class CDMahoutEvaluatorTest extends MahoutTestCase {
@Test
public void testEvaluate() throws Exception {
int nbrules = 100;
Random rng = RandomUtils.getRandom();
int target = 1;
// random rules
List<Rule> rules = Lists.newArrayList();
for (int index = 0; index < nbrules; index++) {
rules.add(new RandomRule(index, target, rng));
}
// dataset
// This is sensitive to the working directory where the test is run:
FileSystem fs = FileSystem.get(new Configuration());
Path input = fs.makeQualified(new Path(Resources.getResource("wdbc").toURI()));
CDMahoutEvaluator.initializeDataSet(input);
// evaluate the rules
List<CDFitness> results = Lists.newArrayList();
Path output = getTestTempDirPath("output");
fs = output.getFileSystem(new Configuration());
fs.delete(output, true); // It's unhappy if this directory exists
CDMahoutEvaluator.evaluate(rules, target, input, output, results);
// check the results
for (int index = 0; index < nbrules; index++) {
assertEquals("rule " + index, RandomRuleResults.getResult(index),
results.get(index));
}
}
}