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Java example source code file (DoubleNodeTest.java)
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The DoubleNodeTest.java Java example source code
/*
* Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package java.util.stream;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.PrimitiveIterator;
import java.util.Spliterators;
import java.util.function.Function;
import org.testng.annotations.DataProvider;
import org.testng.annotations.Test;
@Test
public class DoubleNodeTest extends OpTestCase {
@DataProvider(name = "nodes")
public Object[][] createSizes() {
List<Object[]> params = new ArrayList<>();
for (int size : Arrays.asList(0, 1, 4, 15, 16, 17, 127, 128, 129, 1000)) {
double[] array = new double[size];
for (int i = 0; i < array.length; i++) {
array[i] = i;
}
List<Node nodes = new ArrayList<>();
nodes.add(Nodes.node(array));
nodes.add(degenerateTree(Spliterators.iterator(Arrays.spliterator(array))));
nodes.add(tree(toList(array), l -> Nodes.node(toDoubleArray(l))));
nodes.add(fill(array, Nodes.doubleBuilder(array.length)));
nodes.add(fill(array, Nodes.doubleBuilder()));
for (Node<Double> node : nodes) {
params.add(new Object[]{array, node});
}
}
return params.toArray(new Object[0][]);
}
private static void assertEqualsListDoubleArray(List<Double> list, double[] array) {
assertEquals(list.size(), array.length);
for (int i = 0; i < array.length; i++)
assertEquals(array[i], list.get(i));
}
private List<Double> toList(double[] a) {
List<Double> l = new ArrayList<>();
for (double i : a) {
l.add(i);
}
return l;
}
private double[] toDoubleArray(List<Double> l) {
double[] a = new double[l.size()];
int i = 0;
for (Double e : l) {
a[i++] = e;
}
return a;
}
private Node.OfDouble fill(double[] array, Node.Builder.OfDouble nb) {
nb.begin(array.length);
for (double i : array)
nb.accept(i);
nb.end();
return nb.build();
}
private Node.OfDouble degenerateTree(PrimitiveIterator.OfDouble it) {
if (!it.hasNext()) {
return Nodes.node(new double[0]);
}
double i = it.nextDouble();
if (it.hasNext()) {
return new Nodes.ConcNode.OfDouble(Nodes.node(new double[] {i}), degenerateTree(it));
}
else {
return Nodes.node(new double[] {i});
}
}
private Node.OfDouble tree(List<Double> l, Function, Node.OfDouble> m) {
if (l.size() < 3) {
return m.apply(l);
}
else {
return new Nodes.ConcNode.OfDouble(
tree(l.subList(0, l.size() / 2), m),
tree(l.subList(l.size() / 2, l.size()), m));
}
}
@Test(dataProvider = "nodes")
public void testAsArray(double[] array, Node.OfDouble n) {
assertEquals(n.asPrimitiveArray(), array);
}
@Test(dataProvider = "nodes")
public void testFlattenAsArray(double[] array, Node.OfDouble n) {
assertEquals(Nodes.flattenDouble(n).asPrimitiveArray(), array);
}
@Test(dataProvider = "nodes")
public void testCopyTo(double[] array, Node.OfDouble n) {
double[] copy = new double[(int) n.count()];
n.copyInto(copy, 0);
assertEquals(copy, array);
}
@Test(dataProvider = "nodes", groups = { "serialization-hostile" })
public void testForEach(double[] array, Node.OfDouble n) {
List<Double> l = new ArrayList<>((int) n.count());
n.forEach((double e) -> {
l.add(e);
});
assertEqualsListDoubleArray(l, array);
}
@Test(dataProvider = "nodes")
public void testStreams(double[] array, Node.OfDouble n) {
TestData.OfDouble data = TestData.Factory.ofNode("Node", n);
exerciseOps(data, s -> s);
exerciseTerminalOps(data, s -> s.toArray());
}
@Test(dataProvider = "nodes", groups={ "serialization-hostile" })
// throws SOE on serialization of DoubleConcNode[size=1000]
public void testSpliterator(double[] array, Node.OfDouble n) {
SpliteratorTestHelper.testDoubleSpliterator(n::spliterator);
}
@Test(dataProvider = "nodes")
public void testTruncate(double[] array, Node.OfDouble n) {
int[] nums = new int[] { 0, 1, array.length / 2, array.length - 1, array.length };
for (int start : nums)
for (int end : nums) {
if (start < 0 || end < 0 || end < start || end > array.length)
continue;
Node.OfDouble slice = n.truncate(start, end, Double[]::new);
double[] asArray = slice.asPrimitiveArray();
for (int k = start; k < end; k++)
assertEquals(array[k], asArray[k - start]);
}
}
}
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