/**
 * Copyright (C) 2010 the original author or authors.
 * See the notice.md file distributed with this work for additional
 * information regarding copyright ownership.
 * <p>
 * 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
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * 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 com.beust.jcommander;

import com.beust.jcommander.args.*;
import com.beust.jcommander.args.ArgsEnum.ChoiceType;
import com.beust.jcommander.command.CommandAdd;
import com.beust.jcommander.command.CommandCommit;
import com.beust.jcommander.command.CommandMain;
import com.beust.jcommander.converters.FileConverter;
import com.beust.jcommander.internal.Lists;
import com.beust.jcommander.internal.Maps;
import org.testng.Assert;
import org.testng.annotations.DataProvider;
import org.testng.annotations.Test;

import java.io.*;
import java.math.BigDecimal;
import java.nio.charset.Charset;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.*;
import java.util.ResourceBundle;

@Test
public class JCommanderTest {

    @Test
    public void testLongMainParameterDescription() {
        //setup
        JCommander jc = new JCommander(new ArgsLongMainParameterDescription());
        StringBuilder sb = new StringBuilder();

        //action
        jc.usage(sb);

        //verify
        for (String line : sb.toString().split("\n")) {
            Assert.assertTrue(line.length() <= jc.getColumnSize(), "line length < column size");
        }
    }

    @Test
    public void testLongCommandDescription() throws Exception {
        //setup
        JCommander jc = new JCommander();
        jc.addCommand(new ArgsLongCommandDescription());
        StringBuilder sb = new StringBuilder();

        //action
        jc.usage(sb);

        //verify
        for (String line : sb.toString().split("\n")) {
            Assert.assertTrue(line.length() <= jc.getColumnSize(), "line length < column size");
        }
    }

    @Test
    public void testDescriptionWrappingLongWord() {
        //setup
        StringBuilder sb = new StringBuilder();
        final JCommander jc = new JCommander(new ArgsLongDescription());

        //action
        jc.usage(sb);

        //verify
        for (String line : sb.toString().split("\n")) {
            Assert.assertTrue(line.length() <= jc.getColumnSize(), "line length < column size");
        }
    }

    public void simpleArgs() throws ParseException {
        Args1 args = new Args1();
        String[] argv = {"-debug", "-log", "2", "-float", "1.2", "-double", "1.3", "-bigdecimal", "1.4",
                "-date", "2011-10-26", "-groups", "unit", "a", "b", "c"};
        new JCommander(args, argv);

        Assert.assertTrue(args.debug);
        Assert.assertEquals(args.verbose.intValue(), 2);
        Assert.assertEquals(args.groups, "unit");
        Assert.assertEquals(args.parameters, Arrays.asList("a", "b", "c"));
        Assert.assertEquals(args.floa, 1.2f, 0.1f);
        Assert.assertEquals(args.doub, 1.3f, 0.1f);
        Assert.assertEquals(args.bigd, new BigDecimal("1.4"));
        Assert.assertEquals(args.date, new SimpleDateFormat("yyyy-MM-dd").parse("2011-10-26"));
    }

    @DataProvider
    public Object[][] alternateNamesListArgs() {
        return new Object[][]{
                new String[][]{new String[]{"--servers", "1", "-s", "2", "--servers", "3"}},
                new String[][]{new String[]{"-s", "1", "-s", "2", "--servers", "3"}},
                new String[][]{new String[]{"--servers", "1", "--servers", "2", "-s", "3"}},
                new String[][]{new String[]{"-s", "1", "--servers", "2", "-s", "3"}},
                new String[][]{new String[]{"-s", "1", "-s", "2", "--servers", "3"}},
        };
    }

    /**
     * Confirm that List<?> parameters with alternate names return the correct
     * List regardless of how the arguments are specified
     */

    @Test(dataProvider = "alternateNamesListArgs")
    public void testAlternateNamesForListParameters(String[] argv) {
        AlternateNamesForListArgs args = new AlternateNamesForListArgs();

        new JCommander(args, argv);

        Assert.assertEquals(args.serverNames.size(), 3);
        Assert.assertEquals(args.serverNames.get(0), argv[1]);
        Assert.assertEquals(args.serverNames.get(1), argv[3]);
        Assert.assertEquals(args.serverNames.get(2), argv[5]);
    }


    /**
     * Make sure that if there are args with multiple names (e.g. "-log" and "-verbose"),
     * the usage will only display it once.
     */
    public void repeatedArgs() {
        Args1 args = new Args1();
        String[] argv = {"-log", "2"};
        JCommander jc = new JCommander(args, argv);
        Assert.assertEquals(jc.getParameters().size(), 8);
    }

    /**
     * Not specifying a required option should throw an exception.
     */
    @Test(expectedExceptions = ParameterException.class)
    public void requiredFields1Fail() {
        Args1 args = new Args1();
        String[] argv = {"-debug"};
        new JCommander(args, argv);
    }

    /**
     * Getting the description of a nonexistent command should throw an exception.
     */
    @Test(expectedExceptions = ParameterException.class)
    public void nonexistentCommandShouldThrow() {
        String[] argv = {};
        JCommander jc = new JCommander(new Object(), argv);
        jc.getCommandDescription("foo");
    }

    /**
     * Required options with multiple names should work with all names.
     */
    private void multipleNames(String option) {
        Args1 args = new Args1();
        String[] argv = {option, "2"};
        new JCommander(args, argv);
        Assert.assertEquals(args.verbose.intValue(), 2);
    }

    public void multipleNames1() {
        multipleNames("-log");
    }

    public void multipleNames2() {
        multipleNames("-verbose");
    }

    private void i18n1(String bundleName, Locale locale, String expectedString) {
        ResourceBundle bundle = locale != null ? ResourceBundle.getBundle(bundleName, locale)
                : null;

        ArgsI18N1 i18n = new ArgsI18N1();
        String[] argv = {"-host", "localhost"};
        JCommander jc = new JCommander(i18n, bundle, argv);

        ParameterDescription pd = jc.getParameters().get(0);
        Assert.assertEquals(pd.getDescription(), expectedString);
    }

    public void i18nNoLocale() {
        i18n1("MessageBundle", null, "Host");
    }

    public void i18nUsLocale() {
        i18n1("MessageBundle", new Locale("en", "US"), "Host");
    }

    public void i18nFrLocale() {
        i18n1("MessageBundle", new Locale("fr", "FR"), "Hôte");
    }

    private void i18n2(Object i18n) {
        String[] argv = {"-host", "localhost"};
        Locale.setDefault(new Locale("fr", "FR"));
        JCommander jc = new JCommander(i18n, argv);
        ParameterDescription pd = jc.getParameters().get(0);
        Assert.assertEquals(pd.getDescription(), "Hôte");
    }

    public void i18nWithResourceAnnotation() {
        i18n2(new ArgsI18N2());
    }

    public void i18nWithResourceAnnotationNew() {
        i18n2(new ArgsI18N2New());
    }

    public void i18MissingKeyForCommand() {
        ResourceBundle bundle = ResourceBundle.getBundle("MessageBundle", new Locale("en", "US"));
        JCommander jc = new JCommander(new ArgsHelp(), bundle);
        jc.addCommand(new ArgsLongCommandDescription());
        StringBuilder sb = new StringBuilder();
        jc.usage(sb);
        String usage = sb.toString();
        Assert.assertTrue(usage.contains("text"));
    }

    public void noParseConstructor() {
        JCommander jCommander = new JCommander(new ArgsMainParameter1());
        jCommander.usage(new StringBuilder());
        // Before fix, this parse would throw an exception, because it calls createDescription, which
        // was already called by usage(), and can only be called once.
        jCommander.parse();
    }

    /**
     * Test a use case where there are required parameters, but you still want
     * to interrogate the options which are specified.
     */
    public void usageWithRequiredArgsAndResourceBundle() {
        ArgsHelp argsHelp = new ArgsHelp();
        JCommander jc = new JCommander(new Object[]{argsHelp, new ArgsRequired()},
                java.util.ResourceBundle.getBundle("MessageBundle"));
        // Should be able to display usage without triggering validation
        jc.usage(new StringBuilder());
        try {
            jc.parse("-h");
            Assert.fail("Should have thrown a required parameter exception");
        } catch (ParameterException e) {
            Assert.assertTrue(e.getMessage().contains("are required"));
        }
        Assert.assertTrue(argsHelp.help);
    }

    public void multiObjects() {
        ArgsMaster m = new ArgsMaster();
        ArgsSlave s = new ArgsSlave();
        String[] argv = {"-master", "master", "-slave", "slave"};
        new JCommander(new Object[]{m, s}, argv);

        Assert.assertEquals(m.master, "master");
        Assert.assertEquals(s.slave, "slave");
    }

    @Test(expectedExceptions = ParameterException.class)
    public void multiObjectsWithDuplicatesFail() {
        ArgsMaster m = new ArgsMaster();
        ArgsSlave s = new ArgsSlaveBogus();
        String[] argv = {"-master", "master", "-slave", "slave"};
        new JCommander(new Object[]{m, s}, argv);
    }

    public void arityString() {
        ArgsArityString args = new ArgsArityString();
        String[] argv = {"-pairs", "pair0", "pair1", "rest"};
        new JCommander(args, argv);

        Assert.assertEquals(args.pairs.size(), 2);
        Assert.assertEquals(args.pairs.get(0), "pair0");
        Assert.assertEquals(args.pairs.get(1), "pair1");
        Assert.assertEquals(args.rest.size(), 1);
        Assert.assertEquals(args.rest.get(0), "rest");
    }

    @Test(expectedExceptions = ParameterException.class)
    public void arity2Fail() {
        ArgsArityString args = new ArgsArityString();
        String[] argv = {"-pairs", "pair0"};
        new JCommander(args, argv);
    }

    @Test(expectedExceptions = ParameterException.class)
    public void multipleUnparsedFail() {
        ArgsMultipleUnparsed args = new ArgsMultipleUnparsed();
        String[] argv = {};
        new JCommander(args, argv);
    }

    public void privateArgs() {
        ArgsPrivate args = new ArgsPrivate();
        new JCommander(args, "-verbose", "3");
        Assert.assertEquals(args.getVerbose().intValue(), 3);
    }

    @Test(
            expectedExceptions = ParameterException.class,
            expectedExceptionsMessageRegExp = "Cannot use final field .*#_foo as a parameter;"
                    + " compile-time constant inlining may hide new values written to it.")
    public void finalArgs() {
        Object args = new Object() {
            @Parameter(names = "-foo")
            final int _foo = 0;
        };
        new JCommander(args).usage();
    }

    public void converterArgs() {
        ArgsConverter args = new ArgsConverter();
        String fileName = "a";
        new JCommander(args, "-file", "/tmp/" + fileName,
                "-listStrings", "Tuesday,Thursday",
                "-listInts", "-1,8",
                "-listBigDecimals", "-11.52,100.12");
        Assert.assertEquals(args.file.getName(), fileName);
        Assert.assertEquals(args.listStrings.size(), 2);
        Assert.assertEquals(args.listStrings.get(0), "Tuesday");
        Assert.assertEquals(args.listStrings.get(1), "Thursday");
        Assert.assertEquals(args.listInts.size(), 2);
        Assert.assertEquals(args.listInts.get(0).intValue(), -1);
        Assert.assertEquals(args.listInts.get(1).intValue(), 8);
        Assert.assertEquals(args.listBigDecimals.size(), 2);
        Assert.assertEquals(args.listBigDecimals.get(0), new BigDecimal("-11.52"));
        Assert.assertEquals(args.listBigDecimals.get(1), new BigDecimal("100.12"));
    }

    public void hiddenConverter() {
        class Args {
            @Parameter(names = "--path", converter = HiddenConverter.class)
            public String path;
        }

        new JCommander(new Args(), "--path", "/tmp/a");
    }

    public void hiddenArgs() {
        new JCommander(new HiddenArgs(), "--input", "/tmp/a", "--output", "/tmp/b");
    }

    public void hiddenSplitter() {
        class Args {
            @Parameter(names = "--extensions", splitter = HiddenParameterSplitter.class)
            public List<String> extensions;
        }
        if (HiddenParameterSplitter.class.getConstructors().length == 0) {
            return; // Compiler has optimised away the private constructor
        }

        Args args = new Args();
        new JCommander(args, "--extensions", ".txt;.md");
        Assert.assertEquals(Arrays.asList(".txt", ".md"), args.extensions);
    }

    private void argsBoolean1(String[] params, Boolean expected) {
        ArgsBooleanArity args = new ArgsBooleanArity();
        new JCommander(args, params);
        Assert.assertEquals(args.debug, expected);
    }

    private void argsBoolean0(String[] params, Boolean expected) {
        ArgsBooleanArity0 args = new ArgsBooleanArity0();
        new JCommander(args, params);
        Assert.assertEquals(args.debug, expected);
    }

    public void booleanArity1() {
        argsBoolean1(new String[]{}, Boolean.FALSE);
        argsBoolean1(new String[]{"-debug", "true"}, Boolean.TRUE);
    }

    public void booleanArity0() {
        argsBoolean0(new String[]{}, Boolean.FALSE);
        argsBoolean0(new String[]{"-debug"}, Boolean.TRUE);
    }

    @Test(expectedExceptions = ParameterException.class)
    public void badParameterShouldThrowParameter1Exception() {
        Args1 args = new Args1();
        String[] argv = {"-log", "foo"};
        new JCommander(args, argv);
    }

    @Test(expectedExceptions = ParameterException.class)
    public void badParameterShouldThrowParameter2Exception() {
        Args1 args = new Args1();
        String[] argv = {"-long", "foo"};
        new JCommander(args, argv);
    }

    public void listParameters() {
        Args2 a = new Args2();
        String[] argv = {"-log", "2", "-groups", "unit", "a", "b", "c", "-host", "host2"};
        new JCommander(a, argv);
        Assert.assertEquals(a.verbose.intValue(), 2);
        Assert.assertEquals(a.groups, "unit");
        Assert.assertEquals(a.hosts, Arrays.asList("host2"));
        Assert.assertEquals(a.parameters, Arrays.asList("a", "b", "c"));
    }

    public void separatorEqual() {
        SeparatorEqual s = new SeparatorEqual();
        String[] argv = {"-log=3", "--longoption=10"};
        new JCommander(s, argv);
        Assert.assertEquals(s.log.intValue(), 3);
        Assert.assertEquals(s.longOption.intValue(), 10);
    }

    public void separatorColon() {
        SeparatorColon s = new SeparatorColon();
        String[] argv = {"-verbose:true"};
        new JCommander(s, argv);
        Assert.assertTrue(s.verbose);
    }

    public void separatorBoth() {
        SeparatorColon s = new SeparatorColon();
        SeparatorEqual s2 = new SeparatorEqual();
        String[] argv = {"-verbose:true", "-log=3"};
        new JCommander(new Object[]{s, s2}, argv);
        Assert.assertTrue(s.verbose);
        Assert.assertEquals(s2.log.intValue(), 3);
    }

    public void separatorMixed1() {
        SeparatorMixed s = new SeparatorMixed();
        String[] argv = {"-long:1", "-level=42"};
        new JCommander(s, argv);
        Assert.assertEquals(s.l.longValue(), 1l);
        Assert.assertEquals(s.level.intValue(), 42);
    }

    public void slashParameters() {
        SlashSeparator a = new SlashSeparator();
        String[] argv = {"/verbose", "/file", "/tmp/a"};
        new JCommander(a, argv);
        Assert.assertTrue(a.verbose);
        Assert.assertEquals(a.file, "/tmp/a");
    }

    public void inheritance() {
        ArgsInherited args = new ArgsInherited();
        String[] argv = {"-log", "3", "-child", "2"};
        new JCommander(args, argv);
        Assert.assertEquals(args.child.intValue(), 2);
        Assert.assertEquals(args.log.intValue(), 3);
    }

    public void negativeNumber() {
        Args1 a = new Args1();
        String[] argv = {"-verbose", "-3"};
        new JCommander(a, argv);
        Assert.assertEquals(a.verbose.intValue(), -3);
    }

    @Test(expectedExceptions = ParameterException.class)
    public void requiredMainParameters() {
        ArgsRequired a = new ArgsRequired();
        String[] argv = {};
        new JCommander(a, argv);
    }

    public void usageShouldNotChange() {
        JCommander jc = new JCommander(new Args1(), "-log", "1");
        StringBuilder sb = new StringBuilder();
        jc.usage(sb);
        String expected = sb.toString();
        jc = new JCommander(new Args1(), "-debug", "-log", "2", "-long", "5");
        sb = new StringBuilder();
        jc.usage(sb);
        String actual = sb.toString();
        Assert.assertEquals(actual, expected);
    }

    private void verifyCommandOrdering(String[] commandNames, Object[] commands) {
        CommandMain cm = new CommandMain();
        JCommander jc = new JCommander(cm);

        for (int i = 0; i < commands.length; i++) {
            jc.addCommand(commandNames[i], commands[i]);
        }

        Map<String, JCommander> c = jc.getCommands();
        Assert.assertEquals(c.size(), commands.length);

        Iterator<String> it = c.keySet().iterator();
        for (int i = 0; i < commands.length; i++) {
            Assert.assertEquals(it.next(), commandNames[i]);
        }
    }

    public void commandsShouldBeShownInOrderOfInsertion() {
        verifyCommandOrdering(new String[]{"add", "commit"},
                new Object[]{new CommandAdd(), new CommandCommit()});
        verifyCommandOrdering(new String[]{"commit", "add"},
                new Object[]{new CommandCommit(), new CommandAdd()});
    }

    @DataProvider
    public static Object[][] f() {
        return new Integer[][]{
                new Integer[]{3, 5, 1},
                new Integer[]{3, 8, 1},
                new Integer[]{3, 12, 2},
                new Integer[]{8, 12, 2},
                new Integer[]{9, 10, 1},
        };
    }

    @Test(expectedExceptions = ParameterException.class)
    public void arity1Fail() {
        final Arity1 arguments = new Arity1();
        final JCommander jCommander = new JCommander(arguments);
        final String[] commands = {
                "-inspect"
        };
        jCommander.parse(commands);
    }

    public void arity1Success1() {
        final Arity1 arguments = new Arity1();
        final JCommander jCommander = new JCommander(arguments);
        final String[] commands = {
                "-inspect", "true"
        };
        jCommander.parse(commands);
        Assert.assertTrue(arguments.inspect);
    }

    public void arity1Success2() {
        final Arity1 arguments = new Arity1();
        final JCommander jCommander = new JCommander(arguments);
        final String[] commands = {
                "-inspect", "false"
        };
        jCommander.parse(commands);
        Assert.assertFalse(arguments.inspect);
    }

    @Parameters(commandDescription = "Help for the given commands.")
    public static class Help {
        public static final String NAME = "help";

        @Parameter(description = "List of commands.")
        public List<String> commands = new ArrayList<>();
    }

    @Test(expectedExceptions = ParameterException.class,
            description = "Verify that the main parameter's type is checked to be a List")
    public void wrongMainTypeShouldThrow() {
        JCommander jc = new JCommander(new ArgsRequiredWrongMain());
        jc.parse("f1", "f2");
    }

    @Test(description = "This used to run out of memory")
    public void oom() {
        JCommander jc = new JCommander(new ArgsOutOfMemory());
        jc.usage(new StringBuilder());
    }

    @Test
    public void getParametersShouldNotNpe() {
        JCommander jc = new JCommander(new Args1());
        List<ParameterDescription> parameters = jc.getParameters();
    }

    public void validationShouldWork1() {
        ArgsValidate1 a = new ArgsValidate1();
        JCommander jc = new JCommander(a);
        jc.parse("-age", "2 ");
        Assert.assertEquals(a.age, new Integer(2));
    }

    @Test(expectedExceptions = ParameterException.class)
    public void validationShouldWorkWithDefaultValues() {
        ArgsValidate2 a = new ArgsValidate2();
        new JCommander(a).usage();
    }

    @Test
    public void multipleValidators() {
        for (int i = 1; i < 100; i += 2) {
            ArgsMultiValidate a = new ArgsMultiValidate();
            JCommander jc = new JCommander(a);
            jc.parse("-age", String.valueOf(i));
        }
    }

    @Test(expectedExceptions = ParameterException.class)
    public void multipleValidatorsFails1() {
        ArgsMultiValidate a = new ArgsMultiValidate();
        JCommander jc = new JCommander(a);
        jc.parse("-age", "131");
    }

    @Test(expectedExceptions = ParameterException.class)
    public void multipleValidatorsFails2() {
        ArgsMultiValidate a = new ArgsMultiValidate();
        JCommander jc = new JCommander(a);
        jc.parse("-age", "0");
    }

    @Test(expectedExceptions = ParameterException.class)
    public void validationShouldWork2() {
        ArgsValidate1 a = new ArgsValidate1();
        JCommander jc = new JCommander(a);
        jc.parse("-age", "-2 ");
    }

    @Test
    public void validationShouldReceiveRightParameterName() {
        ArgMultiNameValidator validator = new ArgMultiNameValidator();
        JCommander jc = new JCommander(validator);
        String paramName = "-name2";
        jc.parse(paramName, "param1");
        Assert.assertEquals(ArgMultiNameValidator.MultiNameValidator.parsedName, paramName);
    }

    public void atFileCanContainEmptyLines() throws IOException {
        File f = File.createTempFile("JCommander", null);
        f.deleteOnExit();
        FileWriter fw = new FileWriter(f);
        fw.write("-log\n");
        fw.write("\n");
        fw.write("2\n");
        fw.close();
        new JCommander(new Args1(), "@" + f.getAbsolutePath());
    }

    public void atFileWithInNonDefaultCharset() throws IOException {
        final Charset utf32 = Charset.forName("UTF-32");
        final File f = File.createTempFile("JCommander", null);
        f.deleteOnExit();
        try (OutputStreamWriter fw = new OutputStreamWriter(new FileOutputStream(f), utf32)) {
            fw.write("-log\n");
            fw.write("2\n");
            fw.write("-groups\n");
            fw.write("\u9731\n");
        }
        final Args1 args1 = new Args1();
        final JCommander jc = new JCommander(args1);
        try {
            jc.parse("@" + f.getAbsolutePath());
            throw new IllegalStateException("Expected exception to be thrown");
        } catch (ParameterException expected) {
            Assert.assertTrue(expected.getMessage().startsWith("Could not read file"));
        }
        jc.setAtFileCharset(utf32);
        jc.parse("@" + f.getAbsolutePath());
        Assert.assertEquals("\u9731", args1.groups);
    }

    public void handleEqualSigns() {
        ArgsEquals a = new ArgsEquals();
        JCommander jc = new JCommander(a);
        jc.parse("-args=a=b,b=c");
        Assert.assertEquals(a.args, "a=b,b=c");
    }

    @SuppressWarnings("serial")
    public void handleSets() {
        ArgsWithSet a = new ArgsWithSet();
        new JCommander(a, "-s", "3,1,2");
        Assert.assertEquals(a.set, new TreeSet<Integer>() {{
            add(1);
            add(2);
            add(3);
        }});
    }

    private static final List<String> V = Arrays.asList("a", "b", "c", "d");

    @DataProvider
    public Object[][] variable() {
        return new Object[][]{
                //new Object[]{0, V.subList(0, 0), V},
                new Object[]{1, V.subList(0, 1), V.subList(1, 4)},
                new Object[]{2, V.subList(0, 2), V.subList(2, 4)},
                new Object[]{3, V.subList(0, 3), V.subList(3, 4)},
                new Object[]{4, V.subList(0, 4), V.subList(4, 4)},
        };
    }

    @Test(dataProvider = "variable")
    public void variableArity(int count, List<String> var, List<String> main) {
        VariableArity va = new VariableArity(count);
        new JCommander(va).parse("-variable", "a", "b", "c", "d");
        Assert.assertEquals(var, va.var);
        Assert.assertEquals(main, va.main);
    }

    @Test(expectedExceptions = ParameterException.class)
    public void variableArityZeroNonBoolean() {
        VariableArity va = new VariableArity(0);
        new JCommander(va).parse("-variable", "a", "b", "c", "d");
    }

    public void enumArgs() {
        ArgsEnum args = new ArgsEnum();
        String[] argv = {"-choice", "ONE", "-choices", "ONE", "Two"};
        JCommander jc = new JCommander(args, argv);

        Assert.assertEquals(args.choice, ArgsEnum.ChoiceType.ONE);

        List<ChoiceType> expected = Arrays.asList(ChoiceType.ONE, ChoiceType.Two);
        Assert.assertEquals(expected, args.choices);

        for (ParameterDescription param : jc.getParameters()) {
            // order can vary depending on JDK version
            if (param.getLongestName().equals("-choice")) {
                Assert.assertEquals(param.getDescription(),
                        "Options: " + EnumSet.allOf((Class<? extends Enum>) ArgsEnum.ChoiceType.class));
                return;
            }
        }
        Assert.fail("Could not find -choice parameter.");
    }

    public void enumArgs2() {
        // issue #266
        ArgsEnum args = new ArgsEnum();
        new JCommander(args, "-choices", "ONE,Two");
        Assert.assertEquals(Arrays.asList(ChoiceType.ONE, ChoiceType.Two), args.choices);
    }

    public void enumArgsCaseInsensitive() {
        ArgsEnum args = new ArgsEnum();
        String[] argv = {"-choice", "one"};
        JCommander jc = new JCommander(args, argv);

        Assert.assertEquals(args.choice, ArgsEnum.ChoiceType.ONE);
    }

    @Test(expectedExceptions = ParameterException.class)
    public void enumArgsFail() {
        ArgsEnum args = new ArgsEnum();
        String[] argv = {"-choice", "A"};
        new JCommander(args, argv);
    }

    @Test
    public void testDefaultListConverterForString() {
        ArgsList al = new ArgsList();
        JCommander j = new JCommander(al);
        j.parse("-groups", "a,b");
        Assert.assertEquals(al.groups.get(0), "a");
        Assert.assertEquals(al.groups.get(1), "b");
    }

    @Test
    public void testDefaultListConverterForStandardType() {
        ArgsList al = new ArgsList();
        JCommander j = new JCommander(al);
        j.parse("-ints", "41,42");
        Assert.assertEquals(al.ints.get(0).intValue(), 41);
        Assert.assertEquals(al.ints.get(1).intValue(), 42);
    }

    @Test
    public void testDefaultListConverterWithCustomConverterAndSplitter() {
        ArgsList al = new ArgsList();
        JCommander j = new JCommander(al);
        j.parse("-hp", "localhost:1000;example.com:1001");
        Assert.assertEquals(al.hostPorts.get(0).host, "localhost");
        Assert.assertEquals(al.hostPorts.get(0).port.intValue(), 1000);
        Assert.assertEquals(al.hostPorts.get(1).host, "example.com");
        Assert.assertEquals(al.hostPorts.get(1).port.intValue(), 1001);
    }

    @Test
    public void testDefaultListConverterWithCustomConverterAndDefaultSplitter() {
        ArgsList al = new ArgsList();
        JCommander j = new JCommander(al);
        j.parse("-hp2", "localhost:1000,example.com:1001");
        Assert.assertEquals(al.hp2.get(1).host, "example.com");
        Assert.assertEquals(al.hp2.get(1).port.intValue(), 1001);
    }

    @Test
    public void testCustomListConverter() {
        ArgsList al = new ArgsList();
        JCommander j = new JCommander(al);
        j.parse("-uppercase", "ab,cd");
        Assert.assertEquals(al.uppercase.get(0), "AB");
        Assert.assertEquals(al.uppercase.get(1), "CD");
    }

    @Test(expectedExceptions = ParameterException.class)
    public void shouldThrowIfUnknownOption() {
        class A {
            @Parameter(names = "-long")
            public long l;
        }
        A a = new A();
        new JCommander(a).parse("-lon", "32");
    }

    @Test(expectedExceptions = ParameterException.class)
    public void mainParameterShouldBeValidate() {
        class V implements IParameterValidator {

            @Override
            public void validate(String name, String value) throws ParameterException {
                Assert.assertEquals("a", value);
            }
        }

        class A {
            @Parameter(validateWith = V.class)
            public List<String> m;
        }

        A a = new A();
        new JCommander(a).parse("b");
    }

    @Parameters(commandNames = {"--configure"})
    public static class ConfigureArgs {
    }

    public static class BaseArgs {
        @Parameter(names = {"-h", "--help"}, description = "Show this help screen")
        private boolean help = false;

        @Parameter(names = {"--version", "-version"}, description = "Show the program version")
        private boolean version;
    }

    public void commandsWithSamePrefixAsOptionsShouldWork() {
        BaseArgs a = new BaseArgs();
        ConfigureArgs conf = new ConfigureArgs();
        JCommander jc = new JCommander(a);
        jc.addCommand(conf);
        jc.parse("--configure");
    }

    public void dynamicParameters() {
        class Command {
            @DynamicParameter(names = {"-P"}, description = "Additional command parameters")
            private Map<String, String> params = Maps.newHashMap();
        }
        JCommander commander = new JCommander();
        Command c = new Command();
        commander.addCommand("command", c);
        commander.parse("command", "-Pparam='name=value'");
        Assert.assertEquals(c.params.get("param"), "'name=value'");
    }

    public void exeParser() {
        class Params {
            @Parameter(names = "-i")
            private String inputFile;
        }

        String args[] = {"-i", ""};
        Params p = new Params();
        new JCommander(p, args);
    }

    public void multiVariableArityList() {
        class Params {
            @Parameter(names = "-paramA", description = "ParamA", variableArity = true)
            private List<String> paramA = Lists.newArrayList();

            @Parameter(names = "-paramB", description = "ParamB", variableArity = true)
            private List<String> paramB = Lists.newArrayList();
        }

        {
            String args[] = {"-paramA", "a1", "a2", "-paramB", "b1", "b2", "b3"};
            Params p = new Params();
            new JCommander(p, args).parse();
            Assert.assertEquals(p.paramA, Arrays.asList("a1", "a2"));
            Assert.assertEquals(p.paramB, Arrays.asList("b1", "b2", "b3"));
        }

        {
            String args[] = {"-paramA", "a1", "a2", "-paramB", "b1", "-paramA", "a3"};
            Params p = new Params();
            new JCommander(p, args).parse();
            Assert.assertEquals(p.paramA, Arrays.asList("a1", "a2", "a3"));
            Assert.assertEquals(p.paramB, Arrays.asList("b1"));
        }
    }

    @Test(enabled = false,
            description = "Need to double check that the command description is i18n'ed in the usage")
    public void commandKey() {
        @Parameters(resourceBundle = "MessageBundle", commandDescriptionKey = "command")
        class Args {
            @Parameter(names = "-myoption", descriptionKey = "myoption")
            private boolean option;
        }
        JCommander j = new JCommander();
        Args a = new Args();
        j.addCommand("comm", a);
        j.usage();
    }

    @Test(expectedExceptions = ParameterException.class,
            expectedExceptionsMessageRegExp = "Was passed main parameter '' but no main parameter was defined.*")
    public void tmp() {
        class A {
            @Parameter(names = "-b")
            public String b;
        }
        new JCommander(new A()).parse("");
    }

    @Test(expectedExceptions = ParameterException.class, expectedExceptionsMessageRegExp = "\"--b\": couldn't convert \"ThisIsATest\" to an integer")
    public void multipleParameterNames() {
        class MultipleParameterNames {
            @Parameter(names = {"-b", "--b"})
            public Integer b;
        }
        new JCommander(new MultipleParameterNames()).parse("--b", "ThisIsATest");
    }

    public void unknownOptionWithDifferentPrefix() {
        @Parameters
        class SlashSeparator {

            @Parameter(names = "/verbose")
            public boolean verbose = false;

            @Parameter(names = "/file")
            public String file;
        }
        SlashSeparator ss = new SlashSeparator();
        try {
            new JCommander(ss).parse("/notAParam");
        } catch (ParameterException ex) {
            boolean result = ex.getMessage().contains("in your arg class");
            Assert.assertTrue(result);
        }
    }

    public void equalSeparator() {
        @Parameters(separators = "=", commandDescription = "My command")
        class MyClass {

            @Parameter(names = {"-p", "--param"}, required = true, description = "param desc...")
            private String param;
        }
        MyClass c = new MyClass();
        String expected = "\"hello\"world";
        new JCommander(c).parse("--param=" + expected);
        Assert.assertEquals(expected, c.param);
    }

    public void simpleArgsSetter() throws ParseException {
        Args1Setter args = new Args1Setter();
        String[] argv = {"-debug", "-log", "2", "-float", "1.2", "-double", "1.3", "-bigdecimal", "1.4",
                "-date", "2011-10-26", "-groups", "unit", "a", "b", "c"};
        new JCommander(args, argv);

        Assert.assertTrue(args.debug);
        Assert.assertEquals(args.verbose.intValue(), 2);
        Assert.assertEquals(args.groups, "unit");
        Assert.assertEquals(args.parameters, Arrays.asList("a", "b", "c"));
        Assert.assertEquals(args.floa, 1.2f, 0.1f);
        Assert.assertEquals(args.doub, 1.3f, 0.1f);
        Assert.assertEquals(args.bigd, new BigDecimal("1.4"));
        Assert.assertEquals(args.date, new SimpleDateFormat("yyyy-MM-dd").parse("2011-10-26"));
    }

    public void verifyHelp() {
        class Arg {
            @Parameter(names = "--help", help = true)
            public boolean help = false;

            @Parameter(names = "file", required = true)
            public String file;
        }
        Arg arg = new Arg();
        String[] argv = {"--help"};
        new JCommander(arg, argv);

        Assert.assertTrue(arg.help);
    }

    public void helpTest() {
        class Arg {
            @Parameter(names = {"?", "-help", "--help"}, description = "Shows help", help = true)
            private boolean help = false;
        }
        Arg arg = new Arg();
        JCommander jc = new JCommander(arg);
        jc.parse("-help");
    }

    @Test
    public void doNotDisplayHelpDefaultValue() {
        class Arg {
            @Parameter(names = "--help", help = true)
            public boolean help = false;
        }
        Arg arg = new Arg();
        String[] argv = {"--help"};
        JCommander jc = new JCommander(arg, argv);

        StringBuilder sb = new StringBuilder();

        jc.usage(sb);

        Assert.assertFalse(sb.toString().contains("Default"));
    }

    @Test(enabled = false, description = "Should only be enable once multiple parameters are allowed")
    public void duplicateParameterNames() {
        class ArgBase {
            @Parameter(names = {"-host"})
            protected String host;
        }

        class Arg1 extends ArgBase {
        }
        Arg1 arg1 = new Arg1();

        class Arg2 extends ArgBase {
        }
        Arg2 arg2 = new Arg2();

        JCommander jc = new JCommander(new Object[]{arg1, arg2});
        jc.parse("-host", "foo");
        Assert.assertEquals(arg1.host, "foo");
        Assert.assertEquals(arg2.host, "foo");
    }

    @Test(enabled = true, description = "Disable top-level @/ampersand file expansion")
    public void disabledAtSignExpansionTest() {
        class Params {
            @Parameter(names = {"-username"})
            protected String username;
        }

        Params params = new Params();

        JCommander jc = new JCommander(params);
        jc.setExpandAtSign(false);
        jc.parse("-username", "@tzellman");
        Assert.assertEquals(params.username, "@tzellman");
    }

    @Test(enabled = true, description = "Enable top-level @/ampersand file expansion, which should throw in this case",
            expectedExceptions = ParameterException.class)
    public void enabledAtSignExpansionTest() {
        class Params {
            @Parameter(names = {"-username"})
            protected String username;
        }

        Params params = new Params();

        JCommander jc = new JCommander(params);
        jc.parse("-username", "@tzellman");
        Assert.assertEquals(params.username, "@tzellman");
    }

    public void parameterWithOneDoubleQuote() {
        @Parameters(separators = "=")
        class Arg {
            @Parameter(names = {"-p", "--param"})
            private String param;
        }
        JCommander jc = new JCommander(new MyClass());
        jc.parse("-p=\"");
    }

    public void emptyStringAsDefault() {
        class Arg {
            @Parameter(names = "-x")
            String s = "";
        }
        Arg a = new Arg();
        StringBuilder sb = new StringBuilder();
        new JCommander(a).usage(sb);
        Assert.assertTrue(sb.toString().contains("Default: <empty string>"));
    }

    @Test
    public void emptyStringShouldBeConsideredAsParameter() {
        class Arg {
            @Parameter(description = "parameters")
            List<String> params;
        }

        Arg a = new Arg();
        String[] args = {""};

        new JCommander(a).parse(args);
        Assert.assertEquals(a.params.size(), 1);
//    Assert.assertEquals();
    }

    @Test
    public void doubleQuotedStringShouldBeConsideredAsParameter() {
        class Arg {
            @Parameter(description = "parameters")
            List<String> params;
        }

        Arg a = new Arg();
        String[] args = {"\"\""};

        new JCommander(a).parse(args);
        Assert.assertEquals(a.params.size(), 1);
//    Assert.assertEquals();
    }

    public void spaces() {
        class Arg {
            @Parameter(names = "-rule", description = "rule")
            private List<String> rules = new ArrayList<>();
        }
        Arg a = new Arg();
        new JCommander(a, "-rule", "some test");
        Assert.assertEquals(a.rules, Arrays.asList("some test"));
    }

    static class V2 implements IParameterValidator2 {
        final static List<String> names = Lists.newArrayList();
        static boolean validateCalled = false;

        @Override
        public void validate(String name, String value) throws ParameterException {
            validateCalled = true;
        }

        @Override
        public void validate(String name, String value, ParameterDescription pd)
                throws ParameterException {
            names.addAll(Arrays.asList(pd.getParameter().names()));
        }
    }

    public void validator2() {
        class Arg {
            @Parameter(names = {"-h", "--host"}, validateWith = V2.class)
            String host;
        }
        Arg a = new Arg();
        V2.names.clear();
        V2.validateCalled = false;
        JCommander jc = new JCommander(a, "--host", "h");
        jc.setAcceptUnknownOptions(true);
        Assert.assertEquals(V2.names, Arrays.asList("-h", "--host"));
        Assert.assertTrue(V2.validateCalled);
    }

    public void usageCommandsUnderUsage() {
        class Arg {
        }
        @Parameters(commandDescription = "command a")
        class ArgCommandA {
            @Parameter(description = "command a parameters")
            List<String> parameters;
        }
        @Parameters(commandDescription = "command b")
        class ArgCommandB {
            @Parameter(description = "command b parameters")
            List<String> parameters;
        }

        Arg a = new Arg();

        JCommander c = new JCommander(a);
        c.addCommand("a", new ArgCommandA());
        c.addCommand("b", new ArgCommandB());

        StringBuilder sb = new StringBuilder();
        c.usage(sb);
        Assert.assertTrue(sb.toString().contains("[command options]\n  Commands:"));
    }

    public void usageWithEmpytLine() {
        class Arg {
        }
        @Parameters(commandDescription = "command a")
        class ArgCommandA {
            @Parameter(description = "command a parameters")
            List<String> parameters;
        }
        @Parameters(commandDescription = "command b")
        class ArgCommandB {
            @Parameter(description = "command b parameters")
            List<String> parameters;
        }

        Arg a = new Arg();

        JCommander c = new JCommander(a);
        c.addCommand("a", new ArgCommandA());
        c.addCommand("b", new ArgCommandB());

        StringBuilder sb = new StringBuilder();
        c.usage(sb);
        Assert.assertTrue(sb.toString().contains("command a parameters\n\n    b"));
    }

    public void usageWithSubCommands() {
        class Arg {
        }
        @Parameters(commandDescription = "command a")
        class ArgCommandA {
            @Parameter(description = "command a parameters")
            List<String> parameters;
        }
        @Parameters(commandDescription = "command b")
        class ArgCommandB {
            @Parameter(description = "command b parameters")
            List<String> parameters;
        }

        Arg a = new Arg();

        JCommander c = new JCommander(a);
        c.setColumnSize(100);
        c.addCommand("a", new ArgCommandA());

        // b is a sub-command of a
        JCommander aCommand = c.getCommands().get("a");
        aCommand.addCommand("b", new ArgCommandB());

        StringBuilder sb = new StringBuilder();
        c.usage(sb);
        Assert.assertTrue(sb.toString().contains("command a parameters\n        Commands:"));
        Assert.assertTrue(sb.toString().contains("command b\n            Usage:"));
    }

    public void partialValidation() {
        class Arg {
            @Parameter(names = {"-h", "--host"})
            String host;
        }
        Arg a = new Arg();
        JCommander jc = new JCommander();
        jc.setAcceptUnknownOptions(true);
        jc.addObject(a);
        jc.parse("-a", "foo", "-h", "host");
        Assert.assertEquals(a.host, "host");
        Assert.assertEquals(jc.getUnknownOptions(), Lists.newArrayList("-a", "foo"));
    }

    /**
     * GITHUB-137.
     */
    public void listArgShouldBeCleared() {
        class Args {
            @Parameter(description = "[endpoint]")
            public List<String> endpoint = Lists.newArrayList("prod");
        }
        Args a = new Args();
        new JCommander(a, "dev");
        Assert.assertEquals(a.endpoint, Lists.newArrayList("dev"));
    }

    @Test
    public void dashDashEmpty() {
        class Parameters {
            @Parameter
            public List<String> mainParameters = new ArrayList<>();
        }

        Parameters a = new Parameters();
        new JCommander(a, "--");
        Assert.assertTrue(a.mainParameters.isEmpty());
    }

    @Test
    public void dashDashDashDash() {
        class Parameters {
            @Parameter
            public List<String> mainParameters = new ArrayList<>();
        }

        Parameters a = new Parameters();
        new JCommander(a, "--", "--");
        Assert.assertEquals(a.mainParameters.size(), 1);
        Assert.assertEquals(a.mainParameters.get(0), "--");
    }

    public void dashDashParameter() {
        class Parameters {
            @Parameter(names = {"-name"})
            public String name;
            @Parameter
            public List<String> mainParameters;
        }

        Parameters a = new Parameters();
        new JCommander(a, "-name", "theName", "--", "param1", "param2");
        Assert.assertEquals(a.name, "theName");
        Assert.assertEquals(a.mainParameters.size(), 2);
        Assert.assertEquals(a.mainParameters.get(0), "param1");
        Assert.assertEquals(a.mainParameters.get(1), "param2");
    }

    public void dashDashParameter2() {
        class Parameters {
            @Parameter(names = {"-name"})
            public String name;
            @Parameter
            public List<String> mainParameters;
        }

        Parameters a = new Parameters();
        new JCommander(a, "param1", "param2", "--", "param3", "-name", "theName");
        Assert.assertNull(a.name);
        Assert.assertEquals(a.mainParameters.size(), 5);
        Assert.assertEquals(a.mainParameters.get(0), "param1");
        Assert.assertEquals(a.mainParameters.get(1), "param2");
        Assert.assertEquals(a.mainParameters.get(2), "param3");
        Assert.assertEquals(a.mainParameters.get(3), "-name");
        Assert.assertEquals(a.mainParameters.get(4), "theName");
    }

    public void access() {
        class Parameters {
            private int bar;

            @Parameter(names = {"-bar", "-foo"})
            private void setBar(int value) {
                bar = value;
            }

            @Parameter(names = "-otherName")
            private String otherName;
        }

        Parameters a = new Parameters();
        new JCommander(a, "-bar", "1");
        Assert.assertEquals(a.bar, 1);
    }

    public void noDash() {
        class Parameters {
            private int bar;

            @Parameter(names = {"bar", "foo"})
            private void setBar(int value) {
                bar = value;
            }

            @Parameter(names = "otherName")
            private String otherName;
        }

        Parameters a = new Parameters();
        new JCommander(a, "bar", "1");
        Assert.assertEquals(a.bar, 1);
    }

    public void commitTest() {
        CommandCommit cc = new CommandCommit();
        new JCommander(cc, "--author=cedric");
        Assert.assertEquals(cc.author, "cedric");
    }

    static class CommandTemplate {
        @Parameter
        private List<String> parameters = new ArrayList<>();

        @Parameter(names = "help", help = true)
        private boolean help;
    }

    public void noDashCommand() {
        class P1 {
            @Parameter(names = "hello")
            private int test;
        }
        P1 p1 = new P1();
        JCommander j = new JCommander();
        j.addCommand("p1", p1);
        j.parse("p1", "hello", "47");
        Assert.assertEquals(p1.test, 47);
    }

    static class ValuesValidator implements IValueValidator<List<Integer>> {
        @Override
        public void validate(String name, List<Integer> values) throws ParameterException {
            int previous = Integer.MIN_VALUE;
            for (Integer i : values) {
                if (i <= previous) {
                    throw new ParameterException("Invalid: values should be strictly increasing.");
                }
                previous = i;
            }
        }
    }

    @Test(expectedExceptions = ParameterException.class, expectedExceptionsMessageRegExp = ".*strictly.*")
    public void issue() {
        class Parameters {
            @Parameter(names = {"-v", "--values"},
                    required = true,
                    variableArity = true,
                    validateValueWith = ValuesValidator.class)
            private List<Integer> values;
        }

        String[] commands = "-v 1 5 2".split("\\s+");
        Parameters arg = new Parameters();
        new JCommander(arg, commands);
    }

    static class MvParameters {
        @SubParameter(order = 0)
        String from;
        @SubParameter(order = 1)
        String to;
    }

    @Test
    public void arity() {
        class Parameters {
            @Parameter(names = {"--mv"}, arity = 2)
            private MvParameters mvParameters;
        }

        Parameters args = new Parameters();
        JCommander.newBuilder()
                .addObject(args)
                .args(new String[]{"--mv", "from", "to"})
                .build();

        Assert.assertNotNull(args.mvParameters);
        Assert.assertEquals(args.mvParameters.from, "from");
        Assert.assertEquals(args.mvParameters.to, "to");
    }

    public void programName() {
        JCommander jcommander = new JCommander();
        String programName = "main";
        jcommander.setProgramName(programName);
        StringBuilder sb = new StringBuilder();
        jcommander.usage(sb);

        Assert.assertTrue(sb.toString().contains(programName));
        Assert.assertEquals(jcommander.getProgramName(), programName);
    }

    public void dontShowOptionUsageIfThereAreNoOptions() {
        class CommandTemplate {
            @Parameter
            List<String> parameters = new ArrayList<>();
        }

        CommandTemplate template = new CommandTemplate();
        JCommander jcommander = new JCommander(template);
        jcommander.setProgramName("main");
        StringBuilder sb = new StringBuilder();
        jcommander.usage(sb);
        Assert.assertEquals(sb.toString().indexOf("options"), -1);
    }

    @Test
    public void annotationsAndDynamicParameters() {
        class DSimple {
            @DynamicParameter(names = "-D", description = "Dynamic parameters go here")
            public Map<String, String> params = Maps.newHashMap();

            @DynamicParameter(names = "-A", assignment = "@")
            public Map<String, String> params2 = Maps.newHashMap();
        }

        new JCommander(new DSimple()).usage(new StringBuilder());
    }

    @Test
    public void twoCommandsSameOption() {
        class GenerateOption {
            @Parameter(names = {"--config"}, required = true, converter = FileConverter.class)
            public File configFile;
        }

        class RegenerateOption {
            @Parameter(names = {"--config"}, required = true, converter = FileConverter.class)
            public File configFile;
        }

        GenerateOption generateOption = new GenerateOption();
        RegenerateOption regenerateOption = new RegenerateOption();
        JCommander.newBuilder()
                .addCommand("--generate", generateOption)
                .addCommand("--regenerate", regenerateOption)
                .args(new String[]{"--generate", "--config", "foo.txt"})
                .build();
        Assert.assertEquals(generateOption.configFile.getName(), "foo.txt");
    }

    @Test
    public void invertedBoolean() {
        class Args {
            @Parameter(names = {"--f"})
            private boolean f = true;
        }
        Args args = new Args();
        JCommander.newBuilder()
                .addObject(args)
                .args(new String[]{"--f"})
                .build();
        Assert.assertEquals(args.f, false);
    }

    @Test(enabled = false)
    public static void main(String[] args) {

        CommandTemplate template = new CommandTemplate();
        JCommander jcommander = new JCommander(template);
        jcommander.setProgramName("prog");
        jcommander.parse("help");

        if (template.help) {
            jcommander.usage();
        }
    }
}