| /* |
| * 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.commons.math3; |
| |
| import org.junit.runners.BlockJUnit4ClassRunner; |
| import org.junit.runners.model.FrameworkMethod; |
| import org.junit.runners.model.InitializationError; |
| import org.junit.runners.model.Statement; |
| |
| |
| /** |
| * A test runner that retries tests when assertions fail. |
| */ |
| public class RetryRunner extends BlockJUnit4ClassRunner { |
| /** |
| * Simple constructor. |
| * |
| * @param testClass Class to test. |
| * @throws InitializationError if default runner cannot be built. |
| */ |
| public RetryRunner(final Class<?> testClass) |
| throws InitializationError { |
| super(testClass); |
| } |
| |
| @Override |
| public Statement methodInvoker(final FrameworkMethod method, |
| Object test) { |
| final Statement singleTryStatement = super.methodInvoker(method, test); |
| return new Statement() { |
| /** |
| * Evaluate the statement. |
| * We attempt several runs for the test, at most MAX_ATTEMPTS. |
| * if one attempt succeeds, we succeed, if all attempts fail, we |
| * fail with the reason corresponding to the last attempt |
| */ |
| @Override |
| public void evaluate() throws Throwable { |
| Throwable failureReason = null; |
| |
| final Retry retry = method.getAnnotation(Retry.class); |
| if (retry == null) { |
| // Do a single test run attempt. |
| singleTryStatement.evaluate(); |
| } else { |
| final int numRetries = retry.value(); |
| |
| for (int i = 0; i < numRetries; ++i) { |
| try { |
| // Do a single test run attempt. |
| singleTryStatement.evaluate(); |
| // Attempt succeeded, stop evaluation here. |
| return; |
| } catch (Throwable t) { |
| // Attempt failed, store the reason. |
| failureReason = t; |
| } |
| } |
| |
| // All attempts failed. |
| throw failureReason; |
| } |
| } |
| }; |
| } |
| } |