org.nd4j.linalg.api.buffer.DoubleDataBufferTest.java Source code

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Here is the source code for org.nd4j.linalg.api.buffer.DoubleDataBufferTest.java

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/*
 *
 *  * 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.nd4j.linalg.api.buffer;

import io.netty.buffer.ByteBuf;
import org.junit.Before;
import org.junit.Test;
import org.nd4j.linalg.BaseNd4jTest;
import org.nd4j.linalg.api.ndarray.INDArray;
import org.nd4j.linalg.factory.Nd4j;
import org.nd4j.linalg.factory.Nd4jBackend;
import org.nd4j.linalg.util.SerializationUtils;

import java.io.File;

import static org.junit.Assert.assertArrayEquals;

/**
 * Double data buffer tests
 *
 * This tests the double buffer data type
 * Put all buffer related tests here
 *
 * @author Adam Gibson
 */
public class DoubleDataBufferTest extends BaseNd4jTest {

    public DoubleDataBufferTest(Nd4jBackend backend) {
        super(backend);
    }

    public DoubleDataBufferTest(String name, Nd4jBackend backend) {
        super(name, backend);
    }

    public DoubleDataBufferTest(String name) {
        super(name);
    }

    public DoubleDataBufferTest() {
    }

    @Before
    public void before() {
        Nd4j.dtype = DataBuffer.Type.DOUBLE;
    }

    @Test
    public void testGetSet() throws Exception {
        double[] d1 = new double[] { 1, 2, 3, 4 };
        DataBuffer d = Nd4j.createBuffer(d1);
        double[] d2 = d.asDouble();
        assertArrayEquals(d1, d2, 1e-1f);

    }

    @Test
    public void testAsBytes() {
        INDArray arr = Nd4j.create(5);
        byte[] d = arr.data().asBytes();
        assertEquals(getFailureMessage(), 8 * 5, d.length);
        INDArray rand = Nd4j.rand(3, 3);
        rand.data().asBytes();

    }

    @Test
    public void testSerialization() {
        DataBuffer buf = Nd4j.createBuffer(5);
        String fileName = "buf.ser";
        File file = new File(fileName);
        file.deleteOnExit();
        org.nd4j.linalg.util.SerializationUtils.saveObject(buf, file);
        DataBuffer buf2 = SerializationUtils.readObject(file);
        assertEquals(buf, buf2);

        Nd4j.alloc = DataBuffer.AllocationMode.DIRECT;
        buf = Nd4j.createBuffer(5);
        file.deleteOnExit();
        org.nd4j.linalg.util.SerializationUtils.saveObject(buf, file);
        buf2 = SerializationUtils.readObject(file);
        assertEquals(buf, buf2);
    }

    @Test
    public void testDup() throws Exception {
        double[] d1 = new double[] { 1, 2, 3, 4 };
        DataBuffer d = Nd4j.createBuffer(d1);
        DataBuffer d2 = d.dup();
        assertEquals(d, d2);
    }

    @Test
    public void testNettyCopy() {
        DataBuffer db = Nd4j.createBuffer(new double[] { 1, 2, 3, 4 });
        ByteBuf buf = db.asNetty();
        if (db.allocationMode() == DataBuffer.AllocationMode.HEAP)
            return;

        ByteBuf copy = buf.copy(0, buf.capacity());
        for (int i = 0; i < db.length(); i++) {
            assertEquals(db.getDouble(i), copy.getDouble(i * 8));
        }
    }

    @Test
    public void testPut() throws Exception {
        double[] d1 = new double[] { 1, 2, 3, 4 };
        DataBuffer d = Nd4j.createBuffer(d1);
        d.put(0, 0.0);
        double[] result = new double[] { 0, 2, 3, 4 };
        d1 = d.asDouble();
        assertArrayEquals(d1, result, 1e-1f);
    }

    @Test
    public void testGetRange() throws Exception {
        DataBuffer buffer = Nd4j.linspace(1, 5, 5).data();
        double[] get = buffer.getDoublesAt(0, 3);
        double[] data = new double[] { 1, 2, 3 };
        assertArrayEquals(get, data, 1e-1f);

        double[] get2 = buffer.asDouble();
        double[] allData = buffer.getDoublesAt(0, buffer.length());
        assertArrayEquals(get2, allData, 1e-1f);

    }

    @Test
    public void testGetOffsetRange() throws Exception {
        DataBuffer buffer = Nd4j.linspace(1, 5, 5).data();
        double[] get = buffer.getDoublesAt(1, 3);
        double[] data = new double[] { 2, 3, 4 };
        assertArrayEquals(get, data, 1e-1f);

        double[] allButLast = new double[] { 2, 3, 4, 5 };

        double[] allData = buffer.getDoublesAt(1, buffer.length());
        assertArrayEquals(allButLast, allData, 1e-1f);

    }

    @Test
    public void testAssign() {
        DataBuffer assertion = Nd4j.createBuffer(new double[] { 1, 2, 3 });
        DataBuffer one = Nd4j.createBuffer(new double[] { 1 });
        DataBuffer twoThree = Nd4j.createBuffer(new double[] { 2, 3 });
        DataBuffer blank = Nd4j.createBuffer(new double[] { 0, 0, 0 });
        blank.assign(one, twoThree);
        assertEquals(assertion, blank);
    }

    @Override
    public char ordering() {
        return 'c';
    }
}