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/*
 * 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.test.testdata;

import org.junit.Assert;

import java.io.BufferedReader;
import java.io.IOException;
import java.util.regex.Pattern;

public class TransitiveClosureData {

	public static void checkOddEvenResult(BufferedReader result) throws IOException {
		Pattern split = Pattern.compile(" ");
		String line;
		while ((line = result.readLine()) != null) {
			String[] res = split.split(line);
			Assert.assertEquals("Malformed result: Wrong number of tokens in line.", 2, res.length);
			try {
				int from = Integer.parseInt(res[0]);
				int to = Integer.parseInt(res[1]);

				Assert.assertEquals("Vertex should not be reachable.", from % 2, to % 2);
			} catch (NumberFormatException e) {
				Assert.fail("Malformed result.");
			}
		}
	}

	private TransitiveClosureData() {}
}