/**
    * 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.hadoop.hbase.hbtop.screen.field;
  
  import static org.hamcrest.CoreMatchers.is;
  import static org.junit.Assert.assertThat;
  import static org.mockito.Mockito.any;
  import static org.mockito.Mockito.anyBoolean;
  import static org.mockito.Mockito.anyInt;
  import static org.mockito.Mockito.eq;
  import static org.mockito.Mockito.inOrder;
  import static org.mockito.Mockito.verify;
  
  import java.util.ArrayList;
  import java.util.EnumMap;
  import java.util.List;
  import org.apache.hadoop.hbase.hbtop.field.Field;
  import org.apache.hadoop.hbase.hbtop.field.FieldInfo;
  import org.apache.hadoop.hbase.hbtop.mode.Mode;
  import org.apache.hadoop.hbase.hbtop.screen.ScreenView;
  import org.apache.hadoop.hbase.hbtop.screen.top.TopScreenView;
  import org.apache.hadoop.hbase.testclassification.SmallTests;
  import org.junit.Before;
  import org.junit.Test;
  import org.junit.experimental.categories.Category;
  import org.junit.runner.RunWith;
  import org.mockito.InOrder;
  import org.mockito.Mock;
  import org.mockito.runners.MockitoJUnitRunner;
  
  @Category(SmallTests.class)
  @RunWith(MockitoJUnitRunner.class)
  public class TestFieldScreenPresenter {
  
    @Mock
    private FieldScreenView fieldScreenView;
  
    private int sortFieldPosition = -1;
    private List<Field> fields;
    private EnumMap<Field, Boolean> fieldDisplayMap;
  
    @Mock
    private FieldScreenPresenter.ResultListener resultListener;
  
    @Mock
    private TopScreenView topScreenView;
  
    private FieldScreenPresenter fieldScreenPresenter;
  
    @Before
    public void setup() {
      Field sortField = Mode.REGION.getDefaultSortField();
  
      fields = new ArrayList<>();
      for (FieldInfo fieldInfo : Mode.REGION.getFieldInfos()) {
        fields.add(fieldInfo.getField());
      }
  
      fieldDisplayMap = new EnumMap<>(Field.class);
      for (FieldInfo fieldInfo : Mode.REGION.getFieldInfos()) {
        fieldDisplayMap.put(fieldInfo.getField(), fieldInfo.isDisplayByDefault());
      }
  
      fieldScreenPresenter =
        new FieldScreenPresenter(fieldScreenView, sortField, fields, fieldDisplayMap, resultListener,
          topScreenView);
  
      for (int i = 0; i < fields.size(); i++) {
        Field field = fields.get(i);
        if (field == sortField) {
          sortFieldPosition = i;
          break;
        }
      }
    }
  
    @Test
    public void testInit() {
      fieldScreenPresenter.init();
  
      int modeHeaderMaxLength = "#COMPingCell".length();
      int modeDescriptionMaxLength = "Write Request Count per second".length();
  
      verify(fieldScreenView).showFieldScreen(eq("#REQ/S"), eq(fields), eq(fieldDisplayMap),
       eq(sortFieldPosition), eq(modeHeaderMaxLength), eq(modeDescriptionMaxLength), eq(false));
   }
 
   @Test
   public void testChangeSortField() {
     fieldScreenPresenter.arrowUp();
     fieldScreenPresenter.setSortField();
 
     fieldScreenPresenter.arrowDown();
     fieldScreenPresenter.arrowDown();
     fieldScreenPresenter.setSortField();
 
     fieldScreenPresenter.pageUp();
     fieldScreenPresenter.setSortField();
 
     fieldScreenPresenter.pageDown();
     fieldScreenPresenter.setSortField();
 
     InOrder inOrder = inOrder(fieldScreenView);
     inOrder.verify(fieldScreenView).showScreenDescription(eq("LRS"));
     inOrder.verify(fieldScreenView).showScreenDescription(eq("#READ/S"));
     inOrder.verify(fieldScreenView).showScreenDescription(eq(fields.get(0).getHeader()));
     inOrder.verify(fieldScreenView).showScreenDescription(
       eq(fields.get(fields.size() - 1).getHeader()));
   }
 
   @Test
   public void testSwitchFieldDisplay() {
     fieldScreenPresenter.switchFieldDisplay();
     fieldScreenPresenter.switchFieldDisplay();
 
     InOrder inOrder = inOrder(fieldScreenView);
     inOrder.verify(fieldScreenView).showField(anyInt(), any(Field.class), eq(false),
       anyBoolean(), anyInt(), anyInt(), anyBoolean());
     inOrder.verify(fieldScreenView).showField(anyInt(), any(Field.class), eq(true),
       anyBoolean(), anyInt(), anyInt(), anyBoolean());
   }
 
   @Test
   @SuppressWarnings("unchecked")
   public void testChangeFieldsOrder() {
     fieldScreenPresenter.turnOnMoveMode();
     fieldScreenPresenter.arrowUp();
     fieldScreenPresenter.turnOffMoveMode();
 
     Field removed = fields.remove(sortFieldPosition);
     fields.add(sortFieldPosition - 1, removed);
 
     assertThat(fieldScreenPresenter.transitionToNextScreen(), is((ScreenView) topScreenView));
     verify(resultListener).accept(any(Field.class), eq(fields), any(EnumMap.class));
   }
 }