TestUtil.java

/*
 * Janino - An embedded Java[TM] compiler
 *
 * Copyright (c) 2001-2010 Arno Unkrig. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
 * following conditions are met:
 *
 *    1. Redistributions of source code must retain the above copyright notice, this list of conditions and the
 *       following disclaimer.
 *    2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the
 *       following disclaimer in the documentation and/or other materials provided with the distribution.
 *    3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote
 *       products derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package util;

import java.util.ArrayList;
import java.util.List;

import org.codehaus.commons.compiler.CompilerFactoryFactory;
import org.codehaus.commons.compiler.ICompilerFactory;
import org.junit.runners.Parameterized.Parameters;

/**
 * Utility methods for testing.
 */
public final
class TestUtil {

    /**
     * Use this method as follows:
     * <pre>
     *     &#64;Parameters(name = "CompilerFactory={0}")
     *     public static Collection&lt;Object[]>
     *     <em>any-name</em>() throws Exception {
     *         return TestUtil.getCompilerFactoriesForParameters();
     *     }
     * </pre>
     *
     * @return The available compiler factories in a format suitable for JUnit {@link Parameters}
     */
    public static List<Object[]>
    getCompilerFactoriesForParameters() throws Exception {
        ArrayList<Object[]> f = new ArrayList<>();
        for (ICompilerFactory fact : CompilerFactoryFactory.getAllCompilerFactories(TestUtil.class.getClassLoader())) {
            f.add(new Object[] { fact });
        }
        if (f.isEmpty()) {
            throw new RuntimeException("Could not find any Compiler Factories on the classpath");
        }
        return f;
    }

    private TestUtil() {}
}