/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file 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 org.apache.mahout.math;
import com.google.common.base.Splitter;
import org.apache.mahout.common.RandomUtils;
import org.junit.Test;
import java.util.Random;
public final class TestRandomAccessSparseVector extends AbstractVectorTest<RandomAccessSparseVector> {
@Override
Vector generateTestVector(int cardinality) {
return new RandomAccessSparseVector(cardinality);
}
@Override
public RandomAccessSparseVector vectorToTest(int size) {
RandomAccessSparseVector r = new RandomAccessSparseVector(size);
Random gen = RandomUtils.getRandom();
for (int i = 0; i < 3; i++) {
r.set(gen.nextInt(r.size()), gen.nextGaussian());
}
return r;
}
@Override
@Test
public void testToString() {
Vector w;
w = generateTestVector(20);
w.set(0, 1.1);
w.set(13, 100500.);
w.set(19, 3.141592);
for (String token : Splitter.on(',').split(w.toString().substring(1, w.toString().length() - 2))) {
String[] tokens = token.split(":");
assertEquals(Double.parseDouble(tokens[1]), w.get(Integer.parseInt(tokens[0])), 0.0);
}
w = generateTestVector(12);
w.set(10, 0.1);
assertEquals("{10:0.1}", w.toString());
w = generateTestVector(12);
assertEquals("{}", w.toString());
}
}