HttpBackOffUnsuccessfulResponseHandlerTest.java

/*
 * Copyright (c) 2013 Google Inc.
 *
 * 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 com.google.api.client.http;

import com.google.api.client.http.HttpBackOffUnsuccessfulResponseHandler.BackOffRequired;
import com.google.api.client.testing.util.MockBackOff;
import com.google.api.client.testing.util.MockSleeper;
import com.google.api.client.util.BackOff;

import junit.framework.TestCase;

import java.io.IOException;

/**
 * Test {@link HttpBackOffUnsuccessfulResponseHandler}.
 *
 * @author Eyal Peled
 */
public class HttpBackOffUnsuccessfulResponseHandlerTest extends TestCase {

  public void testHandleResponse_retryFalse() throws IOException {
    subsetHandleResponse(0, 0, false, new MockBackOff(), BackOffRequired.ALWAYS);
  }

  public void testHandleResponse_requiredFalse() throws IOException {
    subsetHandleResponse(0, 0, true, new MockBackOff(), new BackOffRequired() {
      public boolean isRequired(HttpResponse response) {
        return false;
      }
    });
  }

  public void testHandleResponse_requiredTrue() throws IOException {
    BackOff backOff = new MockBackOff().setBackOffMillis(4).setMaxTries(7);
    subsetHandleResponse(7, 4, true, backOff, BackOffRequired.ALWAYS);
    backOff = new MockBackOff().setBackOffMillis(2).setMaxTries(10);
    subsetHandleResponse(10, 2, true, backOff, BackOffRequired.ALWAYS);
  }

  private void subsetHandleResponse(
      int count, int millis, boolean retry, BackOff backOff, BackOffRequired backOffRequired)
      throws IOException {
    // create the handler
    MockSleeper sleeper = new MockSleeper();
    HttpBackOffUnsuccessfulResponseHandler handler = new HttpBackOffUnsuccessfulResponseHandler(
        backOff).setSleeper(sleeper).setBackOffRequired(backOffRequired);

    while (handler.handleResponse(null, null, retry)) {
      assertEquals(millis, sleeper.getLastMillis());
    }
    assertEquals(count, sleeper.getCount());
  }
}