/*
 * Copyright 2010 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.gradle.api.internal.tasks.testing.junit;

import org.gradle.api.Action;
import org.gradle.api.internal.tasks.testing.TestResultProcessor;
import org.gradle.api.internal.tasks.testing.results.AttachParentTestResultProcessor;
import org.gradle.internal.actor.Actor;
import org.gradle.internal.actor.ActorFactory;
import org.gradle.internal.id.IdGenerator;
import org.gradle.internal.time.Clock;

public class JUnitTestClassProcessor extends AbstractJUnitTestClassProcessor {
    private final IdGenerator<?> idGenerator;
    private final JUnitSpec spec;
    private final Clock clock;

    public JUnitTestClassProcessor(JUnitSpec spec, IdGenerator<?> idGenerator, ActorFactory actorFactory, Clock clock) {
        super(actorFactory);
        this.spec = spec;
        this.idGenerator = idGenerator;
        this.clock = clock;
    }

    @Override
    protected TestResultProcessor createResultProcessorChain(TestResultProcessor resultProcessor) {
        TestResultProcessor resultProcessorChain = new AttachParentTestResultProcessor(resultProcessor);
        return new TestClassExecutionEventGenerator(resultProcessorChain, idGenerator, clock);
    }

    @Override
    public void assertTestFrameworkAvailable() {
        try {
            Class.forName("org.junit.runner.notification.RunListener");
        } catch (ClassNotFoundException e) {
            throw new TestFrameworkNotAvailableException("Failed to load JUnit 4.  Please ensure that the JUnit 4 library is available on the test's runtime classpath.");
        }
    }

    @Override
    protected Action<String> createTestExecutor(Actor resultProcessorActor) {
        TestResultProcessor threadSafeResultProcessor = resultProcessorActor.getProxy(TestResultProcessor.class);
        TestClassExecutionListener threadSafeTestClassListener = resultProcessorActor.getProxy(TestClassExecutionListener.class);

        return new JUnitTestClassExecutor(
            Thread.currentThread().getContextClassLoader(),
            spec,
            clock,
            idGenerator,
            threadSafeTestClassListener,
            threadSafeResultProcessor
        );
    }
}
