EqualIntervalBinningTest.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
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 */
package ml.shifu.shifu.core.binning;

import java.io.IOException;
import java.io.InputStream;
import java.util.List;
import java.util.Random;
import java.util.zip.GZIPInputStream;

import junit.framework.Assert;

import ml.shifu.shifu.container.obj.ModelConfig;
import ml.shifu.shifu.container.obj.RawSourceData;
import ml.shifu.shifu.util.CommonUtils;
import org.apache.commons.io.IOUtils;
import org.testng.annotations.Test;

/**
 * EqualIntervalBinningTest class
 *
 * @Oct 27, 2014
 */
public class EqualIntervalBinningTest {

    @Test
    public void testBinning() {
        Random rd = new Random(System.currentTimeMillis());

        EqualIntervalBinning binning = new EqualIntervalBinning(10);
        for (int i = 0; i < 10000; i++) {
            binning.addData(Integer.toString(rd.nextInt() % 1000));
        }

        System.out.println(binning.getDataBin());
    }


    @Test
    public void tesGussiantBinning() {
        Random rd = new Random(System.currentTimeMillis());

        EqualIntervalBinning binning = new EqualIntervalBinning(10);
        for (int i = 0; i < 10000; i++) {
            binning.addData(Double.toString(rd.nextGaussian() % 1000));
        }

        System.out.println(binning.getDataBin());
    }

    @Test
    public void testSerialObject() {
        EqualIntervalBinning binning = new EqualIntervalBinning();
        String binStr = binning.objToString();
        String[] fieldArr = binStr.split(Character.toString(AbstractBinning.FIELD_SEPARATOR));
        Assert.assertTrue(fieldArr.length == 6);
    }

    @Test
    public void testSmallBinning() throws IOException {
        ModelConfig modelConfig = CommonUtils.loadModelConfig("src/test/resources/example/inner_seg1_v15/ModelConfig.json", RawSourceData.SourceType.LOCAL);

        EqualIntervalBinning inst = new EqualIntervalBinning(1000, modelConfig.getMissingOrInvalidValues());
        InputStream is = EqualIntervalBinningTest.class.getResourceAsStream("/example/inner_seg1_v15/dib_sample_fields.gz");
        GZIPInputStream gzis = new GZIPInputStream(is);

        List<String> lines = IOUtils.readLines(gzis);
        for (String record : lines) {
            String[] fields = record.split("\\|");
            inst.addData(fields[0]);
        }

        List<Double> boundaries = inst.getDataBin();
        System.out.println(boundaries);
        Assert.assertEquals(1001, boundaries.size());

        IOUtils.closeQuietly(gzis);
        IOUtils.closeQuietly(is);
    }
}