/*
 * 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.drivers.parameter;

import org.apache.flink.api.java.utils.ParameterTool;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;

public class IterationConvergenceTest
extends ParameterTestBase {

	private IterationConvergence parameter;

	@Before
	public void setup() {
		super.setup();

		parameter = new IterationConvergence(owner, 10);
	}

	@Test
	public void testWithIterations() {
		parameter.configure(ParameterTool.fromArgs(new String[]{"--iterations", "42"}));
		Assert.assertEquals(42, parameter.getValue().iterations);
		Assert.assertEquals(Double.MAX_VALUE, parameter.getValue().convergenceThreshold, 0.000001);
	}

	@Test
	public void testWithConvergenceThreshold() {
		parameter.configure(ParameterTool.fromArgs(new String[]{"--convergence_threshold", "42"}));
		Assert.assertEquals(Integer.MAX_VALUE, parameter.getValue().iterations);
		Assert.assertEquals(42.0, parameter.getValue().convergenceThreshold, 0.000001);
	}

	@Test
	public void testWithBoth() {
		parameter.configure(ParameterTool.fromArgs(new String[]{"--iterations", "42", "--convergence_threshold", "42"}));
		Assert.assertEquals(42, parameter.getValue().iterations);
		Assert.assertEquals(42.0, parameter.getValue().convergenceThreshold, 0.000001);
	}

	@Test
	public void testWithNeither() {
		parameter.configure(ParameterTool.fromArgs(new String[]{}));
		Assert.assertEquals(10, parameter.getValue().iterations);
		Assert.assertEquals(Double.MAX_VALUE, parameter.getValue().convergenceThreshold, 0.000001);
	}

}