| /* |
| * Copyright 2015 The gRPC Authors |
| * |
| * 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.grpc.internal; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertNotNull; |
| |
| import java.util.Random; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.JUnit4; |
| |
| /** |
| * Test for {@link ExponentialBackoffPolicy}. |
| */ |
| @RunWith(JUnit4.class) |
| public class ExponentialBackoffPolicyTest { |
| private ExponentialBackoffPolicy policy = new ExponentialBackoffPolicy(); |
| private Random notRandom = new Random() { |
| @Override |
| public double nextDouble() { |
| return .5; |
| } |
| }; |
| |
| @Test |
| public void maxDelayReached() { |
| long maxBackoffNanos = 120 * 1000; |
| policy.setMaxBackoffNanos(maxBackoffNanos) |
| .setJitter(0) |
| .setRandom(notRandom); |
| for (int i = 0; i < 50; i++) { |
| if (maxBackoffNanos == policy.nextBackoffNanos()) { |
| return; // Success |
| } |
| } |
| assertEquals("max delay not reached", maxBackoffNanos, policy.nextBackoffNanos()); |
| } |
| |
| @Test public void canProvide() { |
| assertNotNull(new ExponentialBackoffPolicy.Provider().get()); |
| } |
| } |
| |