/**
    * 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.help;
  
  import static org.hamcrest.CoreMatchers.is;
  import static org.junit.Assert.assertThat;
  import static org.mockito.Mockito.argThat;
  import static org.mockito.Mockito.eq;
  import static org.mockito.Mockito.verify;
  
  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.ArgumentMatcher;
  import org.mockito.Mock;
  import org.mockito.runners.MockitoJUnitRunner;
  
  
  @Category(SmallTests.class)
  @RunWith(MockitoJUnitRunner.class)
  public class TestHelpScreenPresenter {
  
    private static final long TEST_REFRESH_DELAY = 5;
  
    @Mock
    private HelpScreenView helpScreenView;
  
    @Mock
    private TopScreenView topScreenView;
  
    private HelpScreenPresenter helpScreenPresenter;
  
    @Before
    public void setup() {
      helpScreenPresenter = new HelpScreenPresenter(helpScreenView, TEST_REFRESH_DELAY,
        topScreenView);
    }
  
    @Test
    public void testInit() {
      helpScreenPresenter.init();
  
      verify(helpScreenView).showHelpScreen(eq(TEST_REFRESH_DELAY), argThat(
        new ArgumentMatcher<CommandDescription[]>() {
          @Override
          public boolean matches(Object o) {
            return ((CommandDescription[]) o).length == 14;
          }
        }));
    }
  
    @Test
    public void testTransitionToTopScreen() {
      assertThat(helpScreenPresenter.transitionToNextScreen(), is((ScreenView) topScreenView));
    }
  }