/*
 * 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.client;

import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.mockito.Mockito.lenient;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

import java.io.IOException;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HRegionLocation;
import org.apache.hadoop.hbase.RegionLocations;
import org.apache.hadoop.hbase.ServerName;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.TableNotEnabledException;
import org.apache.hadoop.hbase.ipc.RpcControllerFactory;
import org.apache.hadoop.hbase.testclassification.ClientTests;
import org.apache.hadoop.hbase.testclassification.SmallTests;
import org.apache.hadoop.hbase.util.Bytes;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.mockito.Mock;
import org.mockito.junit.jupiter.MockitoExtension;

@ExtendWith(MockitoExtension.class)
@Tag(ClientTests.TAG)
@Tag(SmallTests.TAG)
public class TestScannerCallable {

  private static final TableName TABLE_NAME = TableName.valueOf("TestScannerCallable");

  private static final String HOSTNAME = "localhost";
  private static final ServerName SERVERNAME = ServerName.valueOf(HOSTNAME, 60030, 123);
  private static final byte[] ROW = Bytes.toBytes("row1");
  private static final Scan DEFAULT_SCAN = new Scan().withStartRow(ROW, true);

  @Mock
  private ClusterConnection connection;
  @Mock
  private RpcControllerFactory rpcFactory;
  @Mock
  private RegionLocations regionLocations;
  @Mock
  private HRegionLocation regionLocation;

  @BeforeEach
  public void setUp() throws Exception {
    when(connection.getConfiguration()).thenReturn(new Configuration());
    lenient().when(regionLocations.size()).thenReturn(1);
    lenient().when(regionLocations.getRegionLocation(0)).thenReturn(regionLocation);
    lenient().when(regionLocation.getHostname()).thenReturn(HOSTNAME);
    lenient().when(regionLocation.getServerName()).thenReturn(SERVERNAME);
  }

  @Test
  public void testPrepareAlwaysUsesCache() throws Exception {
    when(connection.locateRegion(TABLE_NAME, ROW, true, true, 0)).thenReturn(regionLocations);

    ScannerCallable callable =
      new ScannerCallable(connection, TABLE_NAME, DEFAULT_SCAN, null, rpcFactory, 0);
    callable.prepare(false);
    callable.prepare(true);

    verify(connection, times(2)).locateRegion(TABLE_NAME, ROW, true, true, 0);
  }

  @Test
  public void testHandleDisabledTable() throws IOException {
    when(connection.isTableDisabled(TABLE_NAME)).thenReturn(true);

    ScannerCallable callable =
      new ScannerCallable(connection, TABLE_NAME, DEFAULT_SCAN, null, rpcFactory, 0);

    assertThrows(TableNotEnabledException.class, () -> callable.prepare(true));
  }
}
