1/* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package vogar.target.junit; 18 19import com.google.common.base.Function; 20import java.util.ArrayList; 21import java.util.Collection; 22import org.junit.runner.Runner; 23import org.junit.runners.BlockJUnit4ClassRunner; 24import org.junit.runners.JUnit4; 25import org.junit.runners.model.RunnerBuilder; 26import vogar.target.junit.junit3.AlternateSuiteMethodBuilder; 27 28/** 29 * A composite {@link RunnerBuilder} that will ask each of its list of {@link RunnerBuilder} to 30 * create a runner, returning the result of the first that does so, or null if none match. 31 */ 32public class VogarRunnerBuilder extends RunnerBuilder { 33 34 private static final ReplaceRunnerFunction MAPPING_FUNCTION = new ReplaceRunnerFunction(); 35 36 private final RunnerParams runnerParams; 37 private final Collection<RunnerBuilder> builders; 38 39 public VogarRunnerBuilder(RunnerParams runnerParams) { 40 this.runnerParams = runnerParams; 41 builders = new ArrayList<>(); 42 builders.add(new MappingAnnotatedBuilder(this, MAPPING_FUNCTION)); 43 builders.add(new AlternateSuiteMethodBuilder(runnerParams)); 44 builders.add(new VogarTestCaseBuilder(runnerParams)); 45 builders.add(new VogarJUnit4Builder(this)); 46 } 47 48 public RunnerParams getRunnerParams() { 49 return runnerParams; 50 } 51 52 @Override 53 public Runner runnerForClass(Class<?> testClass) throws Throwable { 54 for (RunnerBuilder builder : builders) { 55 Runner runner = builder.safeRunnerForClass(testClass); 56 if (runner != null) { 57 return runner; 58 } 59 } 60 61 return null; 62 } 63 64 private static class ReplaceRunnerFunction 65 implements Function<Class<? extends Runner>, Class<? extends Runner>> { 66 @Override 67 public Class<? extends Runner> apply(Class<? extends Runner> runnerClass) { 68 if (runnerClass == JUnit4.class || runnerClass == BlockJUnit4ClassRunner.class) { 69 return VogarBlockJUnit4ClassRunner.class; 70 } else { 71 return runnerClass; 72 } 73 } 74 } 75} 76