/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.maven.surefire.common.junit48;

import org.apache.maven.surefire.api.filter.NonAbstractClassFilter;
import org.apache.maven.surefire.api.util.ScannerFilter;
import org.apache.maven.surefire.common.junit4.JUnit4TestChecker;
import org.junit.experimental.runners.Enclosed;

/**
 * Looks for additional junit48-like features
 * @author Geoff Denning
 * @author Kristian Rosenvold
 */
public class JUnit48TestChecker implements ScannerFilter {
    private final NonAbstractClassFilter nonAbstractClassFilter;

    private final JUnit4TestChecker jUnit4TestChecker;

    public JUnit48TestChecker(ClassLoader testClassLoader) {
        this.jUnit4TestChecker = new JUnit4TestChecker(testClassLoader);
        this.nonAbstractClassFilter = new NonAbstractClassFilter();
    }

    @Override
    public boolean accept(Class testClass) {
        return jUnit4TestChecker.accept(testClass) || isAbstractWithEnclosedRunner(testClass);
    }

    @SuppressWarnings({"unchecked"})
    private boolean isAbstractWithEnclosedRunner(Class testClass) {
        return jUnit4TestChecker.isRunWithPresentInClassLoader()
                && isAbstract(testClass)
                && isRunWithEnclosedRunner(testClass);
    }

    private boolean isRunWithEnclosedRunner(Class testClass) {
        @SuppressWarnings("unchecked")
        org.junit.runner.RunWith runWithAnnotation =
                (org.junit.runner.RunWith) testClass.getAnnotation(org.junit.runner.RunWith.class);
        return (runWithAnnotation != null && Enclosed.class.equals(runWithAnnotation.value()));
    }

    private boolean isAbstract(Class testClass) {
        return !nonAbstractClassFilter.accept(testClass);
    }
}
