DoubleArray3DTest.java

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 * 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 hivemall.utils.collections;

import java.util.Random;

import org.junit.Assert;
import org.junit.Test;

public class DoubleArray3DTest {

    @Test
    public void test() {
        final int size_i = 50, size_j = 50, size_k = 5;

        final DoubleArray3D mdarray = new DoubleArray3D();
        mdarray.configure(size_i, size_j, size_k);

        final Random rand = new Random(31L);
        final double[][][] data = new double[size_i][size_j][size_j];
        for (int i = 0; i < size_i; i++) {
            for (int j = 0; j < size_j; j++) {
                for (int k = 0; k < size_k; k++) {
                    double v = rand.nextDouble();
                    data[i][j][k] = v;
                    mdarray.set(i, j, k, v);
                }
            }
        }

        Assert.assertEquals(size_i * size_j * size_k, mdarray.getSize());

        for (int i = 0; i < size_i; i++) {
            for (int j = 0; j < size_j; j++) {
                for (int k = 0; k < size_k; k++) {
                    Assert.assertEquals(data[i][j][k], mdarray.get(i, j, k), 0.d);
                }
            }
        }
    }

    @Test
    public void testConfigureExpand() {
        int size_i = 50, size_j = 50, size_k = 5;

        final DoubleArray3D mdarray = new DoubleArray3D();
        mdarray.configure(size_i, size_j, size_k);

        final Random rand = new Random(31L);
        for (int i = 0; i < size_i; i++) {
            for (int j = 0; j < size_j; j++) {
                for (int k = 0; k < size_k; k++) {
                    double v = rand.nextDouble();
                    mdarray.set(i, j, k, v);
                }
            }
        }

        size_i = 101;
        size_j = 101;
        size_k = 11;
        mdarray.configure(size_i, size_j, size_k);
        Assert.assertEquals(size_i * size_j * size_k, mdarray.getCapacity());
        Assert.assertEquals(size_i * size_j * size_k, mdarray.getSize());

        final double[][][] data = new double[size_i][size_j][size_j];
        for (int i = 0; i < size_i; i++) {
            for (int j = 0; j < size_j; j++) {
                for (int k = 0; k < size_k; k++) {
                    double v = rand.nextDouble();
                    data[i][j][k] = v;
                    mdarray.set(i, j, k, v);
                }
            }
        }

        for (int i = 0; i < size_i; i++) {
            for (int j = 0; j < size_j; j++) {
                for (int k = 0; k < size_k; k++) {
                    Assert.assertEquals(data[i][j][k], mdarray.get(i, j, k), 0.d);
                }
            }
        }
    }

    @Test
    public void testConfigureShrink() {
        int size_i = 50, size_j = 50, size_k = 5;

        final DoubleArray3D mdarray = new DoubleArray3D();
        mdarray.configure(size_i, size_j, size_k);

        final Random rand = new Random(31L);
        for (int i = 0; i < size_i; i++) {
            for (int j = 0; j < size_j; j++) {
                for (int k = 0; k < size_k; k++) {
                    double v = rand.nextDouble();
                    mdarray.set(i, j, k, v);
                }
            }
        }

        int capacity = mdarray.getCapacity();
        size_i = 49;
        size_j = 49;
        size_k = 4;
        mdarray.configure(size_i, size_j, size_k);
        Assert.assertEquals(capacity, mdarray.getCapacity());
        Assert.assertEquals(size_i * size_j * size_k, mdarray.getSize());

        final double[][][] data = new double[size_i][size_j][size_j];
        for (int i = 0; i < size_i; i++) {
            for (int j = 0; j < size_j; j++) {
                for (int k = 0; k < size_k; k++) {
                    double v = rand.nextDouble();
                    data[i][j][k] = v;
                    mdarray.set(i, j, k, v);
                }
            }
        }

        for (int i = 0; i < size_i; i++) {
            for (int j = 0; j < size_j; j++) {
                for (int k = 0; k < size_k; k++) {
                    Assert.assertEquals(data[i][j][k], mdarray.get(i, j, k), 0.d);
                }
            }
        }
    }

}