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   * 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.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.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.INTERNAL_SERVER_ERROR;
  import static io.netty.handler.codec.http.HttpResponseStatus.OK;
  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 the {@link NoRetryPolicy} class
   */
  class NoRetryPolicyTest
  {
      Request mockRequest;
      HttpResponse mockResponse;
      RetryPolicy retryPolicy;
  
      @BeforeEach
      public void setup()
      {
          mockRequest = mock(Request.class);
          mockResponse = mock(HttpResponse.class);
          retryPolicy = new NoRetryPolicy();
          when(mockRequest.requestURI()).thenReturn("/api/uri");
      }
  
      @Test
      void testStatusCode200() throws ExecutionException, InterruptedException
      {
          when(mockResponse.statusCode()).thenReturn(OK.code());
  
          CompletableFuture<HttpResponse> future = new CompletableFuture<>();
          retryPolicy.onResponse(future, mockRequest, mockResponse, null, 1, false,
                                 (attempts, retryDelayMillis) -> fail("Should never retry"));
          future.join();
          assertThat(future.isDone()).isTrue();
          assertThat(future.get()).isSameAs(mockResponse);
      }
  
      @Test
      void testFailsWhenThrowableIsProvided()
      {
          when(mockResponse.statusCode()).thenReturn(OK.code()); // status code is irrelevant
  
          CompletableFuture<HttpResponse> future = new CompletableFuture<>();
          retryPolicy.onResponse(future, mockRequest, mockResponse, new IllegalArgumentException("this fails"), 1, false,
                                 (attempts, retryDelayMillis) -> fail("Should never retry"));
  
          assertThatExceptionOfType(CompletionException.class)
          .isThrownBy(future::join)
          .withCauseInstanceOf(RetriesExhaustedException.class)
          .withMessageContaining("Unable to complete request '/api/uri' after 1 attempt");
          assertThat(future.isCompletedExceptionally()).isTrue();
      }
  
      @Test
      void testFailsWithNon200StatusCode()
      {
          when(mockResponse.statusCode()).thenReturn(INTERNAL_SERVER_ERROR.code());
  
          CompletableFuture<HttpResponse> future = new CompletableFuture<>();
          retryPolicy.onResponse(future, mockRequest, mockResponse, null, 1, false,
                                 (attempts, retryDelayMillis) -> fail("Should never retry"));
  
          assertThatExceptionOfType(CompletionException.class)
          .isThrownBy(future::join)
          .withCauseInstanceOf(RetriesExhaustedException.class)
          .withMessageContaining("Unable to complete request '/api/uri' after 1 attempt");
          assertThat(future.isCompletedExceptionally()).isTrue();
      }
  }
  