flink-core/src/test/java/org/apache/flink/api/common/operators/OrderingTest.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
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 * 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,
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 * See the License for the specific language governing permissions and
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 */

package org.apache.flink.api.common.operators;

import org.junit.Test;

import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertEquals;

public class OrderingTest {

	@Test
	public void testNewOrdering() {
		Ordering ordering = new Ordering();

		// add a field
		ordering.appendOrdering(3, Integer.class, Order.ASCENDING);
		assertEquals(1, ordering.getNumberOfFields());

		// add a second field
		ordering.appendOrdering(1, Long.class, Order.DESCENDING);
		assertEquals(2, ordering.getNumberOfFields());

		// duplicate field index does not change Ordering
		ordering.appendOrdering(1, String.class, Order.ASCENDING);
		assertEquals(2, ordering.getNumberOfFields());

		// verify field positions, types, and orderings
		assertArrayEquals(new int[]{3, 1}, ordering.getFieldPositions());
		assertArrayEquals(new Class[]{Integer.class, Long.class}, ordering.getTypes());
		assertArrayEquals(new boolean[]{true, false}, ordering.getFieldSortDirections());
	}
}