using System.Collections.Generic;

namespace Chernobyl.Collections.Generic.Event
{
    /// <summary>
    /// Tests for implementations of <see cref="IEventDictionary{TKey, TValue}" />.
    /// </summary>
    /// <typeparam name="TKey">The type of the key.</typeparam>
    /// <typeparam name="TValue">The type of the value.</typeparam>
    public abstract class EventDictionaryTests<TKey, TValue>
        : EventCollectionTests<KeyValuePair<TKey, TValue>>
    {
        protected EventDictionaryTests(bool testIterationOrder) :
            base(testIterationOrder)
        {}

        /// <summary>
        /// Creates the instance to be tested with a single item.
        /// </summary>
        /// <returns>The instance to be tested.</returns>
        protected abstract IEventDictionary<TKey, TValue> CreateSingleItemEventDictionary();

        /// <summary>
        /// Creates the instance to be tested with a 5 or more items.
        /// </summary>
        /// <returns>The instance to be tested.</returns>
        protected abstract IEventDictionary<TKey, TValue> CreateManyItemEventDictionary();

        protected override IEventCollection<KeyValuePair<TKey, TValue>> CreateSingleItemEventCollection()
        {
            return CreateSingleItemEventDictionary();
        }

        protected override IEventCollection<KeyValuePair<TKey, TValue>> CreateManyItemEventCollection()
        {
            return CreateManyItemEventDictionary();
        }
    }
}