/*
 * Copyright 2002-2011 the original author or authors.
 *
 * 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
 *
 *      https://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.springframework.core.env;

import java.util.Collections;
import java.util.List;

import org.junit.Test;

import static org.hamcrest.CoreMatchers.*;
import static org.junit.Assert.*;

public class SimpleCommandLineParserTests {

	@Test
	public void withNoOptions() {
		SimpleCommandLineArgsParser parser = new SimpleCommandLineArgsParser();
		assertThat(parser.parse().getOptionValues("foo"), nullValue());
	}

	@Test
	public void withSingleOptionAndNoValue() {
		SimpleCommandLineArgsParser parser = new SimpleCommandLineArgsParser();
		CommandLineArgs args = parser.parse("--o1");
		assertThat(args.containsOption("o1"), is(true));
		assertThat(args.getOptionValues("o1"), equalTo(Collections.EMPTY_LIST));
	}

	@Test
	public void withSingleOptionAndValue() {
		SimpleCommandLineArgsParser parser = new SimpleCommandLineArgsParser();
		CommandLineArgs args = parser.parse("--o1=v1");
		assertThat(args.containsOption("o1"), is(true));
		assertThat(args.getOptionValues("o1").get(0), equalTo("v1"));
	}

	@Test
	public void withMixOfOptionsHavingValueAndOptionsHavingNoValue() {
		SimpleCommandLineArgsParser parser = new SimpleCommandLineArgsParser();
		CommandLineArgs args = parser.parse("--o1=v1", "--o2");
		assertThat(args.containsOption("o1"), is(true));
		assertThat(args.containsOption("o2"), is(true));
		assertThat(args.containsOption("o3"), is(false));
		assertThat(args.getOptionValues("o1").get(0), equalTo("v1"));
		assertThat(args.getOptionValues("o2"), equalTo(Collections.EMPTY_LIST));
		assertThat(args.getOptionValues("o3"), nullValue());
	}

	@Test(expected = IllegalArgumentException.class)
	public void withEmptyOptionText() {
		SimpleCommandLineArgsParser parser = new SimpleCommandLineArgsParser();
		parser.parse("--");
	}

	@Test(expected = IllegalArgumentException.class)
	public void withEmptyOptionName() {
		SimpleCommandLineArgsParser parser = new SimpleCommandLineArgsParser();
		parser.parse("--=v1");
	}

	@Test(expected = IllegalArgumentException.class)
	public void withEmptyOptionValue() {
		SimpleCommandLineArgsParser parser = new SimpleCommandLineArgsParser();
		parser.parse("--o1=");
	}

	@Test(expected = IllegalArgumentException.class)
	public void withEmptyOptionNameAndEmptyOptionValue() {
		SimpleCommandLineArgsParser parser = new SimpleCommandLineArgsParser();
		parser.parse("--=");
	}

	@Test
	public void withNonOptionArguments() {
		SimpleCommandLineArgsParser parser = new SimpleCommandLineArgsParser();
		CommandLineArgs args = parser.parse("--o1=v1", "noa1", "--o2=v2", "noa2");
		assertThat(args.getOptionValues("o1").get(0), equalTo("v1"));
		assertThat(args.getOptionValues("o2").get(0), equalTo("v2"));

		List<String> nonOptions = args.getNonOptionArgs();
		assertThat(nonOptions.get(0), equalTo("noa1"));
		assertThat(nonOptions.get(1), equalTo("noa2"));
		assertThat(nonOptions.size(), equalTo(2));
	}

	@Test(expected = UnsupportedOperationException.class)
	public void assertOptionNamesIsUnmodifiable() {
		CommandLineArgs args = new SimpleCommandLineArgsParser().parse();
		args.getOptionNames().add("bogus");
	}

	@Test(expected = UnsupportedOperationException.class)
	public void assertNonOptionArgsIsUnmodifiable() {
		CommandLineArgs args = new SimpleCommandLineArgsParser().parse();
		args.getNonOptionArgs().add("foo");
	}

}
