/*
 * 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.core.memory;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;

import java.nio.ByteBuffer;

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

@RunWith(Parameterized.class)
public class HybridOffHeapMemorySegmentTest extends MemorySegmentTestBase {

	public HybridOffHeapMemorySegmentTest(int pageSize) {
		super(pageSize);
	}

	@Override
	MemorySegment createSegment(int size) {
		return new HybridMemorySegment(ByteBuffer.allocateDirect(size));
	}

	@Override
	MemorySegment createSegment(int size, Object owner) {
		return new HybridMemorySegment(ByteBuffer.allocateDirect(size), owner);
	}

	@Test
	public void testHybridHeapSegmentSpecifics() {
		try {
			final ByteBuffer buffer = ByteBuffer.allocateDirect(411);
			HybridMemorySegment seg = new HybridMemorySegment(buffer);

			assertFalse(seg.isFreed());
			assertTrue(seg.isOffHeap());
			assertEquals(buffer.capacity(), seg.size());
			assertTrue(buffer == seg.getOffHeapBuffer());

			try {
				seg.getArray();
				fail("should throw an exception");
			}
			catch (IllegalStateException e) {
				// expected
			}

			ByteBuffer buf1 = seg.wrap(1, 2);
			ByteBuffer buf2 = seg.wrap(3, 4);

			assertTrue(buf1 != buffer);
			assertTrue(buf2 != buffer);
			assertTrue(buf1 != buf2);
			assertEquals(1, buf1.position());
			assertEquals(3, buf1.limit());
			assertEquals(3, buf2.position());
			assertEquals(7, buf2.limit());
		}
		catch (Exception e) {
			e.printStackTrace();
			fail(e.getMessage());
		}
	}
}