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

namespace Chernobyl.Collections.Generic.Event
{
    [TestFixture, Description("Tests for the DecoratingEventDictionary<TKey, TValue> type.")]
    public class DecoratingEventDictionaryTests : EventDictionaryTests<string, string>
    {
        public DecoratingEventDictionaryTests() : base(false)
        {}

        public class DictionaryTests : DictionaryTests<string, string>
        {
            public DictionaryTests()
                : base(false)
            {}

            protected override IDictionary<string, string> CreateDictionary()
            {
                return StaticCreateManyItemEventDictionary();
            }

            protected override IDictionary<string, string> CreateReadOnlyDictionary()
            {
                // Read-only DecoratingEventDictionary<TKey, TValue> not supported.
                return null;
            }

            protected override KeyValuePair<string, string> CreateItem()
            {
                return StaticCreateItem();
            }
        }

        static IEventDictionary<string, string> StaticCreateSingleItemEventDictionary()
        {
            IEventDictionary<string, string> eventDictionary = new DecoratingEventDictionary<string, string>();
            eventDictionary.Add("1", "Value 1");
            return eventDictionary;
        }

        static IEventDictionary<string, string> StaticCreateManyItemEventDictionary()
        {
            IEventDictionary<string, string> eventDictionary = new DecoratingEventDictionary<string, string>();
            for (int i = 0; i < RequiredCollectionCount; i++)
            {
                string indexStr = i.ToString();
                eventDictionary.Add(indexStr, "Value " + indexStr);
            }
            return eventDictionary;
        }

        protected static KeyValuePair<string, string> StaticCreateItem()
        {
            return new KeyValuePair<string, string>("10", "Value 10");
        }

        protected override IEventDictionary<string, string> CreateSingleItemEventDictionary()
        {
            return StaticCreateSingleItemEventDictionary();
        }

        protected override IEventDictionary<string, string> CreateManyItemEventDictionary()
        {
            return StaticCreateManyItemEventDictionary();
        }

        protected override KeyValuePair<string, string> CreateItem()
        {
            return StaticCreateItem();
        }
    }
}