/*
 * 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.flink.graph.types.valuearray;

import org.apache.flink.types.NullValue;
import org.junit.Test;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;

public class NullValueArrayTest {

	@Test
	public void testUnboundedArray() {
		int count = 4096;

		ValueArray<NullValue> nva = new NullValueArray();

		// add several elements
		for (int i = 0 ; i < count ; i++) {
			assertFalse(nva.isFull());
			assertEquals(i, nva.size());

			assertTrue(nva.add(NullValue.getInstance()));

			assertEquals(i + 1, nva.size());
		}

		// array never fills
		assertFalse(nva.isFull());
		assertEquals(count, nva.size());

		// verify the array values
		int idx = 0;
		for (NullValue nv : nva) {
			assertEquals(NullValue.getInstance(), nv);
		}

		// add element past end of array
		assertTrue(nva.add(NullValue.getInstance()));
		assertTrue(nva.addAll(nva));

		// test copy
		assertEquals(nva, nva.copy());

		// test copyTo
		NullValueArray nva_to = new NullValueArray();
		nva.copyTo(nva_to);
		assertEquals(nva, nva_to);

		// test mark/reset
		int size = nva.size();
		nva.mark();
		assertTrue(nva.add(NullValue.getInstance()));
		assertEquals(size + 1, nva.size());
		nva.reset();
		assertEquals(size, nva.size());

		// test clear
		nva.clear();
		assertEquals(0, nva.size());
	}
}