/**
* 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.hive.ql.metadata;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
import org.apache.hadoop.hive.metastore.HiveMetaStoreClient;
import org.junit.Test;
import org.apache.hadoop.hive.metastore.api.InvalidOperationException;
import org.apache.hadoop.hive.metastore.api.MetaException;
import org.apache.hadoop.hive.metastore.api.Table;
import org.apache.hadoop.hive.metastore.api.UnknownDBException;
import org.apache.thrift.TException;
import static org.junit.Assert.*;
import static org.mockito.Mockito.*;
/**
* Unit tests for TableIterable
*/
public class TestTableIterable {
@Test
public void testNumReturned() throws MetaException, InvalidOperationException, UnknownDBException, TException {
HiveMetaStoreClient msc = mock(HiveMetaStoreClient.class);
// create a mocked metastore client that returns 3 table objects every time it is called
// will use same size for TableIterable batch fetch size
List<Table> threeTables = Arrays.asList(new Table(), new Table(), new Table());
when(msc.getTableObjectsByName(anyString(), anyListOf(String.class))).thenReturn(threeTables);
List<String> tableNames = Arrays.asList("a", "b", "c", "d", "e", "f");
TableIterable tIterable = new TableIterable(msc, "dummy", tableNames, threeTables.size());
tIterable.iterator();
Iterator<Table> tIter = tIterable.iterator();
int size = 0;
while(tIter.hasNext()) {
size++;
tIter.next();
}
assertEquals("Number of table objects returned", size, tableNames.size());
verify(msc).getTableObjectsByName("dummy", Arrays.asList("a","b","c"));
verify(msc).getTableObjectsByName("dummy", Arrays.asList("d","e","f"));
}
}