/*
 * (C) Copyright 2017 Boni Garcia (http://bonigarcia.github.io/)
 *
 * 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 io.github.bonigarcia;

import org.junit.BeforeClass;
import org.junit.ClassRule;
import org.junit.Test;
import org.junit.rules.ExternalResource;

public class TestClassRule {

    private static Resource resource;

    @ClassRule
    public static ExternalResource rule = new ExternalResource() {
        @Override
        protected void before() throws Throwable {
            resource = new Resource();
            resource.open();
        }

        @Override
        protected void after() {
            resource.close();
            System.out.println();
        }
    };

    @BeforeClass
    public static void before() {
        System.out.println("before class");
    }

    @Test
    public void someTest() throws Exception {
        System.out.println(resource.get());
    }

    @Test
    public void someTest2() throws Exception {
        System.out.println(resource.get());
    }

}

Add @ClassRule example in JUnit 4 project
Add @ClassRule example in JUnit 4 project
