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/*
* Copyright (c) 2013, 2018, 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.
*/
/* @test
* @bug 8195649
* @summary Basic functional test of OptionalDouble
* @author Mike Duigou
* @build ObscureException
* @run testng BasicDouble
*/
import java.util.NoSuchElementException;
import java.util.OptionalDouble;
import java.util.concurrent.atomic.AtomicBoolean;
import static org.testng.Assert.*;
import org.testng.annotations.Test;
public class BasicDouble {
static final double DOUBLEVAL = Math.PI;
static final double UNEXPECTED = 6.62607004E-34;
/**
* Checks a block of assertions over an empty OptionalDouble.
*/
void checkEmpty(OptionalDouble empty) {
assertTrue(empty.equals(OptionalDouble.empty()));
assertTrue(OptionalDouble.empty().equals(empty));
assertFalse(empty.equals(OptionalDouble.of(UNEXPECTED)));
assertFalse(OptionalDouble.of(UNEXPECTED).equals(empty));
assertFalse(empty.equals("unexpected"));
assertFalse(empty.isPresent());
assertTrue(empty.isEmpty());
assertEquals(empty.hashCode(), 0);
assertEquals(empty.orElse(UNEXPECTED), UNEXPECTED);
assertEquals(empty.orElseGet(() -> UNEXPECTED), UNEXPECTED);
assertThrows(NoSuchElementException.class, () -> empty.getAsDouble());
assertThrows(NoSuchElementException.class, () -> empty.orElseThrow());
assertThrows(ObscureException.class, () -> empty.orElseThrow(ObscureException::new));
var b = new AtomicBoolean();
empty.ifPresent(s -> b.set(true));
assertFalse(b.get());
var b1 = new AtomicBoolean(false);
var b2 = new AtomicBoolean(false);
empty.ifPresentOrElse(s -> b1.set(true), () -> b2.set(true));
assertFalse(b1.get());
assertTrue(b2.get());
assertEquals(empty.toString(), "OptionalDouble.empty");
}
/**
* Checks a block of assertions over an OptionalDouble that is expected to
* have a particular value present.
*/
void checkPresent(OptionalDouble opt, double expected) {
assertFalse(opt.equals(OptionalDouble.empty()));
assertFalse(OptionalDouble.empty().equals(opt));
assertTrue(opt.equals(OptionalDouble.of(expected)));
assertTrue(OptionalDouble.of(expected).equals(opt));
assertFalse(opt.equals(OptionalDouble.of(UNEXPECTED)));
assertFalse(OptionalDouble.of(UNEXPECTED).equals(opt));
assertFalse(opt.equals("unexpected"));
assertTrue(opt.isPresent());
assertFalse(opt.isEmpty());
assertEquals(opt.hashCode(), Double.hashCode(expected));
assertEquals(opt.orElse(UNEXPECTED), expected);
assertEquals(opt.orElseGet(() -> UNEXPECTED), expected);
assertEquals(opt.getAsDouble(), expected);
assertEquals(opt.orElseThrow(), expected);
assertEquals(opt.orElseThrow(ObscureException::new), expected);
var b = new AtomicBoolean(false);
opt.ifPresent(s -> b.set(true));
assertTrue(b.get());
var b1 = new AtomicBoolean(false);
var b2 = new AtomicBoolean(false);
opt.ifPresentOrElse(s -> b1.set(true), () -> b2.set(true));
assertTrue(b1.get());
assertFalse(b2.get());
assertEquals(opt.toString(), "OptionalDouble[" + expected + "]");
}
@Test(groups = "unit")
public void testEmpty() {
checkEmpty(OptionalDouble.empty());
}
@Test(groups = "unit")
public void testPresent() {
checkPresent(OptionalDouble.of(DOUBLEVAL), DOUBLEVAL);
}
@Test(groups = "unit")
public void testStreamEmpty() {
assertEquals(OptionalDouble.empty().stream().toArray(), new double[] { });
}
@Test(groups = "unit")
public void testStreamPresent() {
assertEquals(OptionalDouble.of(DOUBLEVAL).stream().toArray(), new double[] { DOUBLEVAL });
}
}
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