001/*
002 * Copyright 2011 Atteo.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
005 * in compliance with the License. You may obtain a copy of the License at
006 *
007 * http://www.apache.org/licenses/LICENSE-2.0
008 *
009 * Unless required by applicable law or agreed to in writing, software distributed under the License
010 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
011 * or implied. See the License for the specific language governing permissions and limitations under
012 * the License.
013 */
014package org.atteo.moonshine.tests;
015
016import java.util.HashMap;
017import java.util.concurrent.Callable;
018
019import org.junit.rules.TestRule;
020import org.junit.runner.Description;
021import org.junit.runners.model.Statement;
022
023import com.google.inject.Key;
024import com.google.inject.servlet.ServletScopes;
025
026/**
027 * With this rule added the test acts as if it were executed as a part of a HTTP request.
028 *
029 * <p>
030 * The test methods of the JUnit test will be executed
031 * in {@link ServletScopes#REQUEST REQUEST} scope
032 * using {@link ServletScopes#scopeRequest(java.util.concurrent.Callable, java.util.Map)}.
033 * </p>
034 */
035public class RequestRule implements TestRule {
036    @Override
037    public Statement apply(final Statement base, Description method) {
038        return new Statement() {
039            @Override
040            public void evaluate() throws Throwable {
041                ServletScopes.scopeRequest(new Callable<Object>() {
042                    @Override
043                    public Object call() throws Exception {
044                        try {
045                            base.evaluate();
046                        } catch (RuntimeException | Error e) {
047                            // don't wrap RuntimeExceptions
048                            // don't wrap Errors either, JUnit throws this
049                            throw e;
050                        } catch (Throwable e) {
051                            throw new RuntimeException(e);
052                        }
053                        return null;
054                    }
055
056                }, new HashMap<Key<?>, Object>()).call();
057            }
058        };
059    }
060}