/*
 * 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.api.java.utils;

import org.junit.Assert;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;

import static org.junit.Assert.fail;

/**
 * Tests for the Options utility class.
 */
public class OptionsTest {

	@Rule
	public ExpectedException expectedException = ExpectedException.none();

	@Test
	public void testChoicesWithInvalidDefaultValue() throws RequiredParametersException {
		expectedException.expect(RequiredParametersException.class);
		expectedException.expectMessage("Default value d is not in the list of valid values for option choices");

		Option option = new Option("choices").choices("a", "b", "c");
		option.defaultValue("d");
	}

	@Test
	public void testChoicesWithValidDefaultValue() {
		Option option = null;
		try {
			option = new Option("choices").choices("a", "b", "c");
			option = option.defaultValue("a");
		} catch (RequiredParametersException e) {
			fail("Exception thrown: " + e.getMessage());
		}

		Assert.assertEquals(option.getDefaultValue(), "a");
	}

	@Test
	public void testChoicesWithInvalidDefautlValue() throws RequiredParametersException {
		expectedException.expect(RequiredParametersException.class);
		expectedException.expectMessage("Valid values for option choices do not contain defined default value x");

		Option option = new Option("choices").defaultValue("x");
		option.choices("a", "b");
	}

	@Test
	public void testIsCastableToDefinedTypeWithDefaultType() {
		Option option = new Option("name");
		Assert.assertTrue(option.isCastableToDefinedType("some value"));
	}

	@Test
	public void testIsCastableToDefinedTypeWithMatchingTypes() {
		// Integer
		Option option = new Option("name").type(OptionType.INTEGER);
		Assert.assertTrue(option.isCastableToDefinedType("15"));

		// Double
		Option optionDouble = new Option("name").type(OptionType.DOUBLE);
		Assert.assertTrue(optionDouble.isCastableToDefinedType("15.0"));

		// Boolean
		Option optionFloat = new Option("name").type(OptionType.BOOLEAN);
		Assert.assertTrue(optionFloat.isCastableToDefinedType("true"));

	}

	@Test
	public void testIsCastableToDefinedTypeWithNonMatchingTypes() {
		// Integer
		Option option = new Option("name").type(OptionType.INTEGER);
		Assert.assertFalse(option.isCastableToDefinedType("true"));

		// Double
		Option optionDouble = new Option("name").type(OptionType.DOUBLE);
		Assert.assertFalse(optionDouble.isCastableToDefinedType("name"));

		// Boolean
		Option optionFloat = new Option("name").type(OptionType.BOOLEAN);
		Assert.assertFalse(optionFloat.isCastableToDefinedType("15"));

	}
}