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Java example source code file (BaseSchemeTest.java)

This example Java source code file (BaseSchemeTest.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

arraylist, baseschemetest, before, classpathresource, collection, exception, net, network, recordreader, recordwriter, scheme, test, util

The BaseSchemeTest.java Java example source code

/*
 *
 *  * Copyright 2015 Skymind,Inc.
 *  *
 *  *    Licensed 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.deeplearning4j.cli.schemes;

import org.canova.api.records.reader.RecordReader;
import org.canova.api.records.writer.RecordWriter;
import org.canova.api.writable.Writable;
import org.deeplearning4j.cli.api.schemes.Scheme;
import org.junit.Before;
import org.junit.Test;
import org.nd4j.linalg.io.ClassPathResource;

import java.net.URI;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

import static org.junit.Assert.*;

/**
 * Tests scheme for creating record writers and readers
 * Initializes scheme
 * Creates a new record reader for a test data set
 * Asserts number of columns in reader
 * Uses a record writer to write to file
 * Creates another record reader to assert columns
 * and confirm that data was written to file
 *
 *  @author sonali
 */
public abstract class BaseSchemeTest {
  protected Scheme scheme;

  @Before
  public void before() {
    initScheme();
  }

  /**
   * Initializes the appropriate scheme for testing
   * @return scheme
   */
  public  Scheme getScheme() {
    return scheme;
  }

  public abstract void initScheme();

  @Test
  public void testScheme() throws Exception {
    Scheme scheme = getScheme();
    RecordReader recordReader = scheme.createReader(new ClassPathResource("iris.txt").getURI());

    assertTrue(recordReader.hasNext());
    while (recordReader.hasNext()) {
      Collection<Writable> record = recordReader.next();
      assertEquals(1, record.size());
    }

    recordReader = scheme.createReader(new ClassPathResource("iris.txt").getURI());

    List<Collection records = new ArrayList<>();
    int count = 0;
    RecordWriter writer = scheme.createWriter(URI.create("test_out.txt"));

    for (Collection<Writable> record : records) {
      writer.write(record);
      assertEquals(1, record.size());
    }

    recordReader = scheme.createReader(URI.create("test_out.txt"));

    while (recordReader.hasNext()) {
      Collection<Writable> record = recordReader.next();
      records.add(record);
      assertEquals(1, record.size());
      count++;
    }

    assertEquals(1, count);
    writer.close();
  }

}

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