8284866: Add test to JDK-8273056
Reviewed-by: jlaskey
This commit is contained in:
parent
1cc3c330e3
commit
3ffec3a50b
58
test/jdk/java/util/Random/RandomExponentialTest.java
Normal file
58
test/jdk/java/util/Random/RandomExponentialTest.java
Normal file
@ -0,0 +1,58 @@
|
||||
/*
|
||||
* Copyright (c) 2022, 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.
|
||||
*/
|
||||
|
||||
import jdk.test.lib.RandomFactory;
|
||||
|
||||
/**
|
||||
* @test
|
||||
* @summary Check that nextExponential() returns non-negative outcomes
|
||||
* @bug 8284866
|
||||
*
|
||||
* @key randomness
|
||||
* @library /test/lib
|
||||
* @build jdk.test.lib.RandomFactory
|
||||
* @run main RandomExponentialTest
|
||||
*/
|
||||
|
||||
public class RandomExponentialTest {
|
||||
|
||||
private static final int SAMPLES = 1_000_000_000;
|
||||
|
||||
public static void main(String[] args) throws Exception {
|
||||
var errCount = 0;
|
||||
var errSample = Double.NaN;
|
||||
var random = RandomFactory.getRandom();
|
||||
for (int i = 0; i < SAMPLES; i++) {
|
||||
var expVal = random.nextExponential();
|
||||
if (!(expVal >= 0.0)) {
|
||||
errCount += 1;
|
||||
errSample = expVal;
|
||||
}
|
||||
}
|
||||
if (errCount > 0) {
|
||||
throw new RuntimeException("%d errors out of %d samples: e.g., %f"
|
||||
.formatted(errCount, SAMPLES, errSample));
|
||||
}
|
||||
}
|
||||
|
||||
}
|
Loading…
x
Reference in New Issue
Block a user