Model-View-ViewModel in WPF

using System.Collections;
using System.Collections.Generic;
using System.Collections.Specialized;

namespace CodeProject.VisualStudio.QualityTools.UnitTestFramework
{
    public static class CollectionChangedWatcherExtensions
    {
        public static NotifyCollectionChangedEventArgs ShouldHaveSeen(this SpecificationValue<CollectionChangedWatcher> self,
            NotifyCollectionChangedAction action)
        {
            return ShouldHaveSeen(self, action, string.Empty, null);
        }

        public static NotifyCollectionChangedEventArgs ShouldHaveSeen(this SpecificationValue<CollectionChangedWatcher> self,
            NotifyCollectionChangedAction action, string message)
        {
            return ShouldHaveSeen(self, action, message, null);
        }

        public static NotifyCollectionChangedEventArgs ShouldHaveSeen(this SpecificationValue<CollectionChangedWatcher> self,
            NotifyCollectionChangedAction action, string message, params object[] parameters)
        {
            IEnumerator<NotifyCollectionChangedEventArgs> enumerator = self.Value.Find(action);
            NotifyCollectionChangedEventArgs found;
            if (!enumerator.MoveNext())
                Specify.Fail("ShouldHaveSeen", string.Empty, message, parameters);
            found = enumerator.Current;
            if (enumerator.MoveNext())
                Specify.Fail("ShouldHaveSeen", string.Empty, message, parameters);
            return found;
        }

        public static NotifyCollectionChangedEventArgs ShouldHaveSeen(this SpecificationValue<CollectionChangedWatcher> self,
            NotifyCollectionChangedAction action, ICollection items)
        {
            return ShouldHaveSeen(self, action, items, string.Empty, null);
        }

        public static NotifyCollectionChangedEventArgs ShouldHaveSeen(this SpecificationValue<CollectionChangedWatcher> self,
            NotifyCollectionChangedAction action, ICollection items, string message)
        {
            return ShouldHaveSeen(self, action, items, message, null);
        }

        public static NotifyCollectionChangedEventArgs ShouldHaveSeen(this SpecificationValue<CollectionChangedWatcher> self,
            NotifyCollectionChangedAction action, ICollection items, string message, params object[] parameters)
        {
            IEnumerator<NotifyCollectionChangedEventArgs> enumerator = self.Value.Find(action, items);
            NotifyCollectionChangedEventArgs found;
            if (!enumerator.MoveNext())
                Specify.Fail("ShouldHaveSeen", string.Empty, message, parameters);
            found = enumerator.Current;
            if (enumerator.MoveNext())
                Specify.Fail("ShouldHaveSeen", string.Empty, message, parameters);
            return found;
        }

        public static NotifyCollectionChangedEventArgs ShouldHaveSeen(this SpecificationValue<CollectionChangedWatcher> self,
            NotifyCollectionChangedAction action, ICollection newItems, ICollection oldItems)
        {
            return ShouldHaveSeen(self, action, newItems, oldItems, string.Empty, null);
        }

        public static NotifyCollectionChangedEventArgs ShouldHaveSeen(this SpecificationValue<CollectionChangedWatcher> self,
            NotifyCollectionChangedAction action, ICollection newItems, ICollection oldItems, string message)
        {
            return ShouldHaveSeen(self, action, newItems, oldItems, message, null);
        }

        public static NotifyCollectionChangedEventArgs ShouldHaveSeen(this SpecificationValue<CollectionChangedWatcher> self,
            NotifyCollectionChangedAction action, ICollection newItems, ICollection oldItems, string message, params object[] parameters)
        {
            IEnumerator<NotifyCollectionChangedEventArgs> enumerator = self.Value.Find(action, newItems, oldItems);
            NotifyCollectionChangedEventArgs found;
            if (!enumerator.MoveNext())
                Specify.Fail("ShouldHaveSeen", string.Empty, message, parameters);
            found = enumerator.Current;
            if (enumerator.MoveNext())
                Specify.Fail("ShouldHaveSeen", string.Empty, message, parameters);
            return found;
        }
    }
}