001/*
002 * Copyright 2002-2015 the original author or authors.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *      https://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.springframework.test.context.junit4.statements;
018
019import org.junit.runners.model.Statement;
020
021import org.springframework.test.context.TestContextManager;
022
023/**
024 * {@code RunBeforeTestClassCallbacks} is a custom JUnit {@link Statement} which allows
025 * the <em>Spring TestContext Framework</em> to be plugged into the JUnit execution chain
026 * by calling {@link TestContextManager#beforeTestClass() beforeTestClass()} on the
027 * supplied {@link TestContextManager}.
028 *
029 * @author Sam Brannen
030 * @since 3.0
031 * @see #evaluate()
032 * @see RunAfterTestMethodCallbacks
033 */
034public class RunBeforeTestClassCallbacks extends Statement {
035
036        private final Statement next;
037
038        private final TestContextManager testContextManager;
039
040
041        /**
042         * Construct a new {@code RunBeforeTestClassCallbacks} statement.
043         * @param next the next {@code Statement} in the execution chain
044         * @param testContextManager the TestContextManager upon which to call
045         * {@code beforeTestClass()}
046         */
047        public RunBeforeTestClassCallbacks(Statement next, TestContextManager testContextManager) {
048                this.next = next;
049                this.testContextManager = testContextManager;
050        }
051
052
053        /**
054         * Invoke {@link TestContextManager#beforeTestClass()} and then evaluate
055         * the next {@link Statement} in the execution chain (typically an instance
056         * of {@link org.junit.internal.runners.statements.RunBefores RunBefores}).
057         */
058        @Override
059        public void evaluate() throws Throwable {
060                this.testContextManager.beforeTestClass();
061                this.next.evaluate();
062        }
063
064}