content: /*
   * 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.cassandra.sidecar.client.retry;
  
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  import java.util.concurrent.CompletableFuture;
  import java.util.concurrent.CompletionException;
  import java.util.concurrent.ExecutionException;
  
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.params.ParameterizedTest;
  import org.junit.jupiter.params.provider.ValueSource;
  
  import org.apache.cassandra.sidecar.client.HttpResponse;
  import org.apache.cassandra.sidecar.client.exception.RetriesExhaustedException;
  import org.apache.cassandra.sidecar.common.request.Request;
  
  import static io.netty.handler.codec.http.HttpResponseStatus.CONFLICT;
  import static org.assertj.core.api.Assertions.assertThat;
  import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
  import static org.assertj.core.api.Fail.fail;
  import static org.mockito.Mockito.mock;
  import static org.mockito.Mockito.when;
  
  /**
   * Unit tests for {@link IgnoreConflictRetryPolicy}
   */
  class IgnoreConflictRetryPolicyTest
  {
      Request mockRequest;
      HttpResponse mockResponse;
      Map<String, List<String>> headersMap;
  
      @BeforeEach
      void setup()
      {
          headersMap = new HashMap<>();
          mockRequest = mock(Request.class);
          mockResponse = mock(HttpResponse.class);
          when(mockResponse.headers()).thenReturn(headersMap);
      }
  
      @ParameterizedTest(name = "{index} => canRetryOnADifferentHost={0}")
      @ValueSource(booleans = { true, false })
      void testRetryPolicyWhenResponseIsNull(boolean canRetryOnADifferentHost)
      {
          int maxRetries = 2;
  
          CompletableFuture<HttpResponse> future = new CompletableFuture<>();
          IgnoreConflictRetryPolicy retryPolicy = new IgnoreConflictRetryPolicy(maxRetries, 100, 100);
  
          for (int currentAttempt = 1; currentAttempt <= maxRetries; currentAttempt++)
          {
              int expectedNextAttempt = currentAttempt + 1;
              retryPolicy.onResponse(future, mockRequest, null, new RuntimeException(), currentAttempt,
                                     canRetryOnADifferentHost, (attempts, retryDelayMillis) -> {
                  if (expectedNextAttempt > maxRetries)
                  {
                      fail("Should not retry");
                  }
                  else
                  {
                      assertThat(attempts).isEqualTo(expectedNextAttempt);
                      if (canRetryOnADifferentHost)
                      {
                          assertThat(retryDelayMillis).isEqualTo(0);
                      }
                      else
                      {
                          assertThat(retryDelayMillis).isEqualTo(100);
                      }
                  }
              });
          }
          assertThatExceptionOfType(CompletionException.class)
          .isThrownBy(future::join)
          .withCauseInstanceOf(RetriesExhaustedException.class);
          assertThat(future.isCompletedExceptionally()).isTrue();
      }
  
      @Test
      void testCompletesWithConflictStatusCode() throws ExecutionException, InterruptedException
      {
          when(mockResponse.statusCode()).thenReturn(CONFLICT.code());
  
          CompletableFuture<HttpResponse> future = new CompletableFuture<>();
          new IgnoreConflictRetryPolicy().onResponse(future, mockRequest, mockResponse, null, 1, false,
                                                     (attempts, retryDelayMillis) -> fail("Should never retry"));
          future.join();
          assertThat(future.isDone()).isTrue();
          assertThat(future.get()).isSameAs(mockResponse);
      }
  }
  