/*
 * Copyright 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * or in the "license" file accompanying this file. This file 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.amazon.opendistro.elasticsearch.performanceanalyzer.config.setting.handler;

import static org.mockito.ArgumentMatchers.anyInt;
import static org.mockito.Mockito.never;
import static org.mockito.Mockito.verify;
import static org.mockito.MockitoAnnotations.initMocks;

import com.amazon.opendistro.elasticsearch.performanceanalyzer.config.PerformanceAnalyzerController;
import com.amazon.opendistro.elasticsearch.performanceanalyzer.config.setting.ClusterSettingsManager;
import org.junit.Before;
import org.junit.Test;
import org.mockito.Mock;

public class NodeStatsSettingHandlerTests {
  private NodeStatsSettingHandler handler;

  @Mock private PerformanceAnalyzerController controller;
  @Mock private ClusterSettingsManager clusterSettingsManager;

  @Before
  public void init() {
    initMocks(this);
    handler = new NodeStatsSettingHandler(controller, clusterSettingsManager);
  }

  @Test
  public void testOnSettingUpdate() {
    Integer newSettingValue = null;
    handler.onSettingUpdate(newSettingValue);
    verify(controller, never()).updateNodeStatsShardsPerCollection(anyInt());

    newSettingValue = 1;
    handler.onSettingUpdate(newSettingValue);
    verify(controller).updateNodeStatsShardsPerCollection(newSettingValue);
  }
}
