/**
    *
    * 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.hbase.archetypes.exemplars.client;
  
  import java.io.IOException;
  import org.apache.hadoop.hbase.HBaseTestingUtility;
  import org.apache.hadoop.hbase.NamespaceDescriptor;
  import org.apache.hadoop.hbase.client.Admin;
  import org.apache.hadoop.hbase.client.Get;
  import org.apache.hadoop.hbase.client.Put;
  import org.apache.hadoop.hbase.client.Result;
  import org.apache.hadoop.hbase.client.Table;
  import org.apache.hadoop.hbase.testclassification.MediumTests;
  import org.apache.hadoop.hbase.util.Bytes;
  import org.junit.AfterClass;
  import static org.junit.Assert.assertEquals;
  import org.junit.BeforeClass;
  import org.junit.Test;
  import org.junit.experimental.categories.Category;
  
  /**
   * Unit testing for HelloHBase.
   */
  @Category(MediumTests.class)
  public class TestHelloHBase {
  
    private static final HBaseTestingUtility TEST_UTIL
            = new HBaseTestingUtility();
  
    @BeforeClass
    public static void beforeClass() throws Exception {
      TEST_UTIL.startMiniCluster(1);
    }
  
    @AfterClass
    public static void afterClass() throws Exception {
      TEST_UTIL.shutdownMiniCluster();
    }
  
    @Test
    public void testNamespaceExists() throws Exception {
      final String NONEXISTENT_NAMESPACE = "xyzpdq_nonexistent";
      final String EXISTING_NAMESPACE = "pdqxyz_myExistingNamespace";
      boolean exists;
      Admin admin = TEST_UTIL.getHBaseAdmin();
  
      exists = HelloHBase.namespaceExists(admin, NONEXISTENT_NAMESPACE);
      assertEquals("#namespaceExists failed: found nonexistent namespace.",
              false, exists);
  
      admin.createNamespace
          (NamespaceDescriptor.create(EXISTING_NAMESPACE).build());
      exists = HelloHBase.namespaceExists(admin, EXISTING_NAMESPACE);
      assertEquals("#namespaceExists failed: did NOT find existing namespace.",
              true, exists);
      admin.deleteNamespace(EXISTING_NAMESPACE);
    }
  
    @Test
    public void testCreateNamespaceAndTable() throws Exception {
      Admin admin = TEST_UTIL.getHBaseAdmin();
      HelloHBase.createNamespaceAndTable(admin);
  
      boolean namespaceExists
              = HelloHBase.namespaceExists(admin, HelloHBase.MY_NAMESPACE_NAME);
      assertEquals("#createNamespaceAndTable failed to create namespace.",
              true, namespaceExists);
  
      boolean tableExists = admin.tableExists(HelloHBase.MY_TABLE_NAME);
      assertEquals("#createNamespaceAndTable failed to create table.",
              true, tableExists);
  
      admin.disableTable(HelloHBase.MY_TABLE_NAME);
      admin.deleteTable(HelloHBase.MY_TABLE_NAME);
      admin.deleteNamespace(HelloHBase.MY_NAMESPACE_NAME);
    }
  
    @Test
    public void testPutRowToTable() throws IOException {
      Admin admin = TEST_UTIL.getHBaseAdmin();
      admin.createNamespace
          (NamespaceDescriptor.create(HelloHBase.MY_NAMESPACE_NAME).build());
      Table table
             = TEST_UTIL.createTable
                 (HelloHBase.MY_TABLE_NAME, HelloHBase.MY_COLUMN_FAMILY_NAME);
 
     HelloHBase.putRowToTable(table);
     Result row = table.get(new Get(HelloHBase.MY_ROW_ID));
     assertEquals("#putRowToTable failed to store row.", false, row.isEmpty());
 
     TEST_UTIL.deleteTable(HelloHBase.MY_TABLE_NAME);
     admin.deleteNamespace(HelloHBase.MY_NAMESPACE_NAME);
   }
 
   @Test
   public void testDeleteRow() throws IOException {
     Admin admin = TEST_UTIL.getHBaseAdmin();
     admin.createNamespace
         (NamespaceDescriptor.create(HelloHBase.MY_NAMESPACE_NAME).build());
     Table table
             = TEST_UTIL.createTable
                 (HelloHBase.MY_TABLE_NAME, HelloHBase.MY_COLUMN_FAMILY_NAME);
 
     table.put(new Put(HelloHBase.MY_ROW_ID).
             addColumn(HelloHBase.MY_COLUMN_FAMILY_NAME,
                     HelloHBase.MY_FIRST_COLUMN_QUALIFIER,
                     Bytes.toBytes("xyz")));
     HelloHBase.deleteRow(table);
     Result row = table.get(new Get(HelloHBase.MY_ROW_ID));
     assertEquals("#deleteRow failed to delete row.", true, row.isEmpty());
 
     TEST_UTIL.deleteTable(HelloHBase.MY_TABLE_NAME);
     admin.deleteNamespace(HelloHBase.MY_NAMESPACE_NAME);
   }
 }