/*
 * 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.asm.degree.filter.undirected;

import org.apache.flink.graph.Graph;
import org.apache.flink.graph.asm.AsmTestBase;
import org.apache.flink.graph.asm.dataset.ChecksumHashCode.Checksum;
import org.apache.flink.graph.library.metric.ChecksumHashCode;
import org.apache.flink.test.util.TestBaseUtils;
import org.apache.flink.types.IntValue;
import org.apache.flink.types.LongValue;
import org.apache.flink.types.NullValue;
import org.junit.Test;

import static org.junit.Assert.assertEquals;

public class MaximumDegreeTest
extends AsmTestBase {

	@Test
	public void testWithSimpleGraph()
			throws Exception {
		Graph<IntValue, NullValue, NullValue> graph = undirectedSimpleGraph
			.run(new MaximumDegree<IntValue, NullValue, NullValue>(3));

		String expectedVerticesResult =
			"(0,(null))\n" +
			"(1,(null))\n" +
			"(2,(null))\n" +
			"(4,(null))\n" +
			"(5,(null))";

		TestBaseUtils.compareResultAsText(graph.getVertices().collect(), expectedVerticesResult);

		String expectedEdgesResult =
			"(0,1,(null))\n" +
			"(0,2,(null))\n" +
			"(1,0,(null))\n" +
			"(1,2,(null))\n" +
			"(2,0,(null))\n" +
			"(2,1,(null))";

		TestBaseUtils.compareResultAsText(graph.getEdges().collect(), expectedEdgesResult);
	}

	@Test
	public void testWithRMatGraph()
			throws Exception {
		Checksum checksum = undirectedRMatGraph(10, 16)
			.run(new MaximumDegree<LongValue, NullValue, NullValue>(16))
			.run(new ChecksumHashCode<LongValue, NullValue, NullValue>())
			.execute();

		assertEquals(805, checksum.getCount());
		assertEquals(0x0000000008028b43L, checksum.getChecksum());
	}
}