/*
 * Copyright 2008 the original author or authors.
 *
 * 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.powermock.modules.junit4.common.internal.impl;

import org.junit.runner.Description;
import org.junit.runner.Runner;
import org.junit.runner.manipulation.Filter;
import org.junit.runner.manipulation.Filterable;
import org.junit.runner.manipulation.NoTestsRemainException;
import org.junit.runner.manipulation.Sortable;
import org.junit.runner.manipulation.Sorter;
import org.junit.runner.notification.RunNotifier;
import org.powermock.core.MockRepository;
import org.powermock.modules.junit4.common.internal.JUnit4TestSuiteChunker;
import org.powermock.modules.junit4.common.internal.PowerMockJUnitRunnerDelegate;

public abstract class AbstractCommonPowerMockRunner extends Runner implements Filterable, Sortable {

    private JUnit4TestSuiteChunker suiteChunker;

    public AbstractCommonPowerMockRunner(Class<?> klass,
                                         Class<? extends PowerMockJUnitRunnerDelegate> runnerDelegateImplClass) throws Exception {
        suiteChunker = new JUnit4TestSuiteChunkerImpl(klass, runnerDelegateImplClass);
        /*
           * For extra safety clear the MockitoRepository on each new
           * instantiation of the runner. This is good in cases where a previous
           * test has used e.g. PowerMock#createMock(..) to create a mock without
           * using this runner. That means that there's some state left in the
           * MockRepository that hasn't been cleared. Currently clearing the
           * MockRepository from any classloader will clear the previous state but
           * it's not certain that this is always the case.
           */
        MockRepository.clear();
    }

    @Override
    public Description getDescription() {
        return suiteChunker.getDescription();
    }

    @Override
    public void run(RunNotifier notifier) {
        try {
            suiteChunker.run(notifier);
        } finally {
            // To avoid out of memory errors!
            suiteChunker = null;
        }
    }

    @Override
    public synchronized int testCount() {
        return suiteChunker.getTestCount();
    }

    @Override
    public void filter(Filter filter) throws NoTestsRemainException {
        suiteChunker.filter(filter);
    }

    @Override
    public void sort(Sorter sorter) {
        suiteChunker.sort(sorter);
    }
}
