//=============================================================================
// Copyright 2006-2010 Daniel W. Dyer
//
// Licensed 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.uncommons.watchmaker.framework;
import java.util.Random;
import org.uncommons.maths.random.XORShiftRNG;
/**
* Utility methods for Watchmaker Framework unit tests. Provides
* access to shared resources used by tests.
* @author Daniel Dyer
*/
public final class FrameworkTestUtils
{
private static final Random RNG = new XORShiftRNG();
private FrameworkTestUtils()
{
// Prevent instantiation.
}
/**
* Returns the singleton RNG shared by all tests. It might be preferable
* to have a separate RNG for each test (for true separation) but this
* causes problems. Seeding dozens of RNGs can exhaust the system's
* available entropy (the Uncommons Maths RNGs seed themselves from
* /dev/random by default).
* @return A random number generator.
*/
public static Random getRNG()
{
return RNG;
}
}