com.cloudera.oryx.common.math.VectorsTest.java Source code

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Here is the source code for com.cloudera.oryx.common.math.VectorsTest.java

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/*
 * Copyright (c) 2013, Cloudera, Inc. All Rights Reserved.
 *
 * Cloudera, Inc. 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
 *
 * This software 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 com.cloudera.oryx.common.math;

import org.apache.commons.math3.linear.RealVector;
import org.junit.Test;

import com.cloudera.oryx.common.OryxTest;

/**
 * Tests {@link Vectors}.
 *
 * @author Sean Owen
 */
public final class VectorsTest extends OryxTest {

    @Test
    public void testDense() {
        RealVector dense = Vectors.dense(10);
        assertEquals(10, dense.getDimension());
    }

    @Test
    public void testOf() {
        RealVector of = Vectors.of(1.0, -2.0, 7.0);
        assertEquals(3, of.getDimension());
        assertEquals(1.0, of.getEntry(0));
        assertEquals(-2.0, of.getEntry(1));
        assertEquals(7.0, of.getEntry(2));
    }

    @Test
    public void testLike() {
        RealVector of = Vectors.of(1.0, -2.0, 7.0);
        RealVector like = Vectors.like(of);
        assertEquals(of.getDimension(), like.getDimension());
        assertEquals(0.0, like.getEntry(0));
        assertSame(of.getClass(), like.getClass());
    }

    @Test
    public void testSparse() {
        RealVector sparse = Vectors.sparse(Integer.MAX_VALUE);
        assertEquals(Integer.MAX_VALUE, sparse.getDimension());
        assertEquals(0.0, sparse.getEntry(0));
    }

}