package it.unimi.dsi.fastutil.ints;

/*
 * Copyright (C) 2017 Sebastiano Vigna
 *
 * 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.
 */

import static org.junit.Assert.assertEquals;

import java.util.ArrayList;
import java.util.Collection;
import java.util.EnumSet;
import java.util.function.Supplier;

import org.junit.Test;
import org.junit.runners.Parameterized.Parameter;
import org.junit.runners.Parameterized.Parameters;

import it.unimi.dsi.fastutil.Hash;

public class Int2IntMapGenericOpenHashTest extends Int2IntMapGenericTest<Int2IntOpenHashMap> {
	@Parameter(2)
	public float loadFactor;

	@SuppressWarnings({ "AutoBoxing", "boxing" })
	@Parameters(name = "{index}: lf {2}")
	public static Iterable<Object[]> data() {
		final EnumSet<Capability> capabilities = EnumSet.allOf(Capability.class);
		final int defSize = Int2IntOpenHashMap.DEFAULT_INITIAL_SIZE;
		final Collection<Object[]> data = new ArrayList<>();
		for (final float loadFactor : new float[] { Hash.DEFAULT_LOAD_FACTOR, Hash.FAST_LOAD_FACTOR, Hash.VERY_FAST_LOAD_FACTOR }) {
			data.add(new Object[] {supplier(defSize, loadFactor), capabilities, loadFactor});
		}
		return data;
	}

	private static Supplier<Int2IntMap> supplier(final int defSize, final float loadFactor) {
		return () -> new Int2IntOpenHashMap(defSize, loadFactor);
	}

	@Test
	public void testAddTo() {
		assertEquals(0, m.addTo(0, 2));
		assertEquals(2, m.get(0));
		assertEquals(2, m.addTo(0, 3));
		assertEquals(5, m.get(0));
		m.defaultReturnValue(-1);
		assertEquals(-1, m.addTo(1, 1));
		assertEquals(0, m.get(1));
		assertEquals(0, m.addTo(1, 1));
		assertEquals(1, m.get(1));
		assertEquals(1, m.addTo(1, -2));
		assertEquals(-1, m.get(1));
	}
}