mllib/linalg/JavaVectorsSuite.java

0001 /*
0002  * Licensed to the Apache Software Foundation (ASF) under one or more
0003  * contributor license agreements.  See the NOTICE file distributed with
0004  * this work for additional information regarding copyright ownership.
0005  * The ASF licenses this file to You under the Apache License, Version 2.0
0006  * (the "License"); you may not use this file except in compliance with
0007  * the License.  You may obtain a copy of the License at
0008  *
0009  *    http://www.apache.org/licenses/LICENSE-2.0
0010  *
0011  * Unless required by applicable law or agreed to in writing, software
0012  * distributed under the License is distributed on an "AS IS" BASIS,
0013  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
0014  * See the License for the specific language governing permissions and
0015  * limitations under the License.
0016  */
0017
0018 package org.apache.spark.mllib.linalg;
0019
0020 import java.util.Arrays;
0021
0022 import static org.junit.Assert.assertArrayEquals;
0023
0024 import scala.Tuple2;
0025
0026 import org.junit.Test;
0027
0028 public class JavaVectorsSuite {
0029
0030   @Test
0031   public void denseArrayConstruction() {
0032     Vector v = Vectors.dense(1.0, 2.0, 3.0);
0033     assertArrayEquals(new double[]{1.0, 2.0, 3.0}, v.toArray(), 0.0);
0034   }
0035
0036   @Test
0037   public void sparseArrayConstruction() {
0038     @SuppressWarnings("unchecked")
0039     Vector v = Vectors.sparse(3, Arrays.asList(
0040       new Tuple2<>(0, 2.0),
0041       new Tuple2<>(2, 3.0)));
0042     assertArrayEquals(new double[]{2.0, 0.0, 3.0}, v.toArray(), 0.0);
0043   }
0044 }