/*
* 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.ignite.ml.math.impls.vector;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.function.BiConsumer;
import java.util.stream.IntStream;
import org.apache.ignite.ml.math.Vector;
import org.apache.ignite.ml.math.exceptions.UnsupportedOperationException;
import org.apache.ignite.ml.math.impls.MathTestConstants;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.Test;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
/**
* Unit tests for {@link VectorView}.
*/
public class VectorViewTest {
/** */
private static final int OFFSET = 10;
/** */
private static final int VIEW_LENGTH = 80;
/** */
private static final String EXTERNALIZE_TEST_FILE_NAME = "externalizeTest";
/** */
private VectorView testVector;
/** */
private DenseLocalOnHeapVector parentVector;
/** */
private double[] parentData;
/** */
@Before
public void setup() {
parentVector = new DenseLocalOnHeapVector(MathTestConstants.STORAGE_SIZE);
IntStream.range(0, MathTestConstants.STORAGE_SIZE).forEach(idx -> parentVector.set(idx, Math.random()));
parentData = parentVector.getStorage().data().clone();
testVector = new VectorView(parentVector, OFFSET, VIEW_LENGTH);
}
/** */
@AfterClass
public static void cleanup() throws IOException {
Files.deleteIfExists(Paths.get(EXTERNALIZE_TEST_FILE_NAME));
}
/** */
@Test
public void testCopy() throws Exception {
Vector cp = testVector.copy();
assertTrue(MathTestConstants.VAL_NOT_EQUALS, cp.equals(testVector));
}
/** */
@Test(expected = UnsupportedOperationException.class)
public void testLike() throws Exception {
for (int card : new int[] {1, 2, 4, 8, 16, 32, 64, 128})
consumeSampleVectors((v, desc) -> {
Vector vLike = new VectorView(v, 0, 1).like(card);
Class<? extends Vector> expType = v.getClass();
assertNotNull("Expect non-null like vector for " + expType.getSimpleName() + " in " + desc, vLike);
assertEquals("Expect size equal to cardinality at " + desc, card, vLike.size());
Class<? extends Vector> actualType = vLike.getClass();
assertTrue("Expected matrix type " + expType.getSimpleName()
+ " should be assignable from actual type " + actualType.getSimpleName() + " in " + desc,
expType.isAssignableFrom(actualType));
});
}
/** See also {@link VectorToMatrixTest#testLikeMatrix()}. */
@Test
public void testLikeMatrix() {
consumeSampleVectors((v, desc) -> {
boolean expECaught = false;
try {
assertNull("Null view instead of exception in " + desc, new VectorView(v, 0, 1).likeMatrix(1, 1));
}
catch (UnsupportedOperationException uoe) {
expECaught = true;
}
assertTrue("Expected exception was not caught in " + desc, expECaught);
});
}
/** */
@Test
public void testWriteReadExternal() throws Exception {
assertNotNull("Unexpected null parent data", parentData);
File f = new File(EXTERNALIZE_TEST_FILE_NAME);
try {
ObjectOutputStream objOutputStream = new ObjectOutputStream(new FileOutputStream(f));
objOutputStream.writeObject(testVector);
objOutputStream.close();
ObjectInputStream objInputStream = new ObjectInputStream(new FileInputStream(f));
VectorView readVector = (VectorView)objInputStream.readObject();
objInputStream.close();
assertTrue(MathTestConstants.VAL_NOT_EQUALS, testVector.equals(readVector));
}
catch (ClassNotFoundException | IOException e) {
fail(e.getMessage());
}
}
/** */
private void consumeSampleVectors(BiConsumer<Vector, String> consumer) {
new VectorImplementationsFixtures().consumeSampleVectors(null, consumer);
}
}