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 com.datastax.oss.driver.api.core.specex;
  
  import static com.datastax.oss.driver.Assertions.assertThat;
  import static org.mockito.Mockito.when;
  
  import com.datastax.oss.driver.api.core.config.DefaultDriverOption;
  import com.datastax.oss.driver.api.core.config.DriverConfig;
  import com.datastax.oss.driver.api.core.config.DriverExecutionProfile;
  import com.datastax.oss.driver.api.core.context.DriverContext;
  import com.datastax.oss.driver.api.core.session.Request;
  import com.datastax.oss.driver.internal.core.specex.ConstantSpeculativeExecutionPolicy;
  import java.time.Duration;
  import org.junit.Before;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.mockito.Mock;
  import org.mockito.junit.MockitoJUnitRunner;
  
  @RunWith(MockitoJUnitRunner.class)
  public class ConstantSpeculativeExecutionPolicyTest {
    @Mock private DriverContext context;
    @Mock private DriverConfig config;
    @Mock private DriverExecutionProfile defaultProfile;
    @Mock private Request request;
  
    @Before
    public void setup() {
      when(context.getConfig()).thenReturn(config);
      when(config.getProfile(DriverExecutionProfile.DEFAULT_NAME)).thenReturn(defaultProfile);
    }
  
    private void mockOptions(int maxExecutions, long constantDelayMillis) {
      when(defaultProfile.getInt(DefaultDriverOption.SPECULATIVE_EXECUTION_MAX))
          .thenReturn(maxExecutions);
      when(defaultProfile.getDuration(DefaultDriverOption.SPECULATIVE_EXECUTION_DELAY))
          .thenReturn(Duration.ofMillis(constantDelayMillis));
    }
  
    @Test(expected = IllegalArgumentException.class)
    public void should_fail_if_delay_negative() {
      mockOptions(1, -10);
      new ConstantSpeculativeExecutionPolicy(context, DriverExecutionProfile.DEFAULT_NAME);
    }
  
    @Test(expected = IllegalArgumentException.class)
    public void should_fail_if_max_less_than_one() {
      mockOptions(0, 10);
      new ConstantSpeculativeExecutionPolicy(context, DriverExecutionProfile.DEFAULT_NAME);
    }
  
    @Test
    public void should_return_delay_until_max() {
      mockOptions(3, 10);
      SpeculativeExecutionPolicy policy =
          new ConstantSpeculativeExecutionPolicy(context, DriverExecutionProfile.DEFAULT_NAME);
  
      // Initial execution starts, schedule first speculative execution
      assertThat(policy.nextExecution(null, null, request, 1)).isEqualTo(10);
      // First speculative execution starts, schedule second one
      assertThat(policy.nextExecution(null, null, request, 2)).isEqualTo(10);
      // Second speculative execution starts, we're at 3 => stop
      assertThat(policy.nextExecution(null, null, request, 3)).isNegative();
    }
  }
  