BufRangeTest.java

package org.rapidoid.buffer;

/*
 * #%L
 * rapidoid-buffer
 * %%
 * Copyright (C) 2014 - 2017 Nikolche Mihajlovski and contributors
 * %%
 * Licensed 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.
 * #L%
 */

import org.junit.Test;
import org.rapidoid.annotation.Authors;
import org.rapidoid.annotation.Since;
import org.rapidoid.data.BufRange;

@Authors("Nikolche Mihajlovski")
@Since("2.0.0")
public class BufRangeTest extends BufferTestCommons {

	@Test
	public void shouldBackupAndRestore() {
		BufRange range = new BufRange(10, 3);
		eq(range, 10, 3);

		long backup = range.backup();

		range.set(7, 17);
		eq(range, 7, 17);

		range.restore(backup);
		eq(range, 10, 3);
	}

	@Test
	public void statisticalTest() {
		BufRange rng = new BufRange();
		isTrue(rng.isEmpty());

		int[] borders = {Integer.MIN_VALUE, -1111, -1, 0, 1, 1111, Integer.MAX_VALUE};

		for (int i = 0; i < borders.length; i++) {
			for (int j = 0; j < borders.length; j++) {
				check(rng, borders[i], borders[j]);
			}
		}

		for (int i = 0; i < 1000000; i++) {
			check(rng, rnd(), rnd());
		}
	}

	private void check(BufRange rng, int a, int b) {
		rng.set(a, b);

		eq(rng, a, b);
		eq(rng.limit(), rng.start + rng.length);

		long backup = rng.backup();
		rng.set(rnd(), rnd());

		rng.restore(backup);
		eq(rng, a, b);
	}

}