/* Copyright (c) Citrix Systems, Inc. 
 * All rights reserved. 
 * 
 * Redistribution and use in source and binary forms, 
 * with or without modification, are permitted provided 
 * that the following conditions are met: 
 * 
 * *   Redistributions of source code must retain the above 
 *     copyright notice, this list of conditions and the 
 *     following disclaimer. 
 * *   Redistributions in binary form must reproduce the above 
 *     copyright notice, this list of conditions and the 
 *     following disclaimer in the documentation and/or other 
 *     materials provided with the distribution. 
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 
 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, 
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 
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 */

using System;
using System.Collections.Generic;
using System.Linq;
using NUnit.Framework;
using XenAdmin;

namespace XenAdminTests.StringExtensionsTests
{
    [Category(TestCategories.Unit)]
    class TruncateStringTest
    {
        [TestCase(0, ExpectedResult = "")]
        [TestCase(1, ExpectedResult = "a")]
        [TestCase(2, ExpectedResult = "ab")]
        [TestCase(3, ExpectedResult = "abc")]
        [TestCase(4, ExpectedResult = "abcd")]
        [TestCase(5, ExpectedResult = "abcde")]
        [Test]
        public string LatinCharactersTest(int size)
        {
            return "abcde".Truncate(size);
        }

        [TestCase(0, ExpectedResult = "")]
        [TestCase(1, ExpectedResult = "短")]
        [TestCase(2, ExpectedResult = "短")]
        [TestCase(3, ExpectedResult = "短𠀁")]
        [TestCase(4, ExpectedResult = "短𠀁")]
        [TestCase(5, ExpectedResult = "短𠀁𪛕")]
        [Test]
        public string Utf16SurrogatePairsTest(int size)
        {
            return "短𠀁𪛕".Truncate(size); // The first character is 2 bytes, but the other two are 4-byte characters (UTF-16 surrogate pairs).
        }
    }

    [Category(TestCategories.Unit)]
    class SplitInChunksTest
    {
        [TestCase("", 2, ExpectedResult = new string[0])]
        [TestCase("abc", 1, ExpectedResult = new[] {"a", "b", "c"})]
        [TestCase("abc", 3, ExpectedResult = new[] {"abc"})]
        [TestCase("abc", 8, ExpectedResult = new[] {"abc"})]
        [TestCase("abcdef", 2, ExpectedResult = new[] {"ab", "cd", "ef"})]
        [TestCase("abcdefgh", 3, ExpectedResult = new[] {"abc", "def", "gh"})]
        [Test]
        public string[] TestSplitInChunks(string input, int chunkSize)
        {
            return input.SplitInChunks(chunkSize);
        }

        [Test]
        public void TestSplitInChunksInvalidArguments()
        {
            Assert.Throws(typeof(ArgumentException), () => "abc".SplitInChunks(-2));
            Assert.Throws(typeof(NullReferenceException), () =>
            {
                string found = new[] {"1", "2"}.FirstOrDefault(x => x == "3");
                found.SplitInChunks(2);
            });
        }
    }

    [Category(TestCategories.Unit)]
    class SplitToDictionaryTest
    {
        [Test]
        public void TestSplitToDictionary()
        {
            string input = "EFI-variables-backend=xapidb;EFI-variables-on-boot=reset;EFI-variables=dGVzdA==";
            
            var output = new Dictionary<string, string>
            {
                {"EFI-variables-backend", "xapidb"},
                {"EFI-variables-on-boot", "reset"},
                {"EFI-variables", "dGVzdA=="}
            };
            
            Assert.AreEqual(output, input.SplitToDictionary(';'));
        }
    }
}