/// <summary>
        /// Initialise Fortis with a spawn provider and item factory and verifies the initialisation.
        /// </summary>
        /// <param name="spawnProvider"></param>
        /// <param name="itemFactory"></param>
        public static void Initialise(ISpawnProvider spawnProvider, IItemFactory itemFactory)
        {
            SpawnProvider = spawnProvider;
            ItemFactory = itemFactory;

            Verify();
        }

        /// <summary>
        /// Verifies that Fortis has been correctly set up.
        /// </summary>
        /// <param name="itemFactory"></param>
        /// <param name="spawnProvider"></param>
        /// <param name="itemSearchFactory"></param>
        public static void Verify(IItemFactory itemFactory, ISpawnProvider spawnProvider, IItemSearchFactory itemSearchFactory)
        {
            var verificationFailed = false;
            var errorMessages = new StringBuilder();

            errorMessages.AppendLine("Fortis intialise verification failed:");
            errorMessages.AppendLine();

            if (!VerifySpawnProvider(spawnProvider))
            {
                errorMessages.AppendLine("SpawnProvider is not initialised");
                verificationFailed = true;
            }

            if (!VerifyItemFactory(itemFactory))
            {
                errorMessages.AppendLine("ItemFactory is not initialised");
                verificationFailed = true;
            }

            if (!VerifyItemSearchFactory(itemSearchFactory))
            {
                errorMessages.AppendLine("ItemSearchFactory is not initialised");
                verificationFailed = true;
            }

            if (verificationFailed)
            {
                throw new Exception(errorMessages.ToString());
            }
        }

        public FieldWrapper(Field field, ISpawnProvider spawnProvider)
        {
            Sitecore.Diagnostics.Assert.ArgumentNotNull(field, "field");

            _modified = false;
            _field = field;

            SpawnProvider = spawnProvider;
        }

        public NameValueListFieldWrapper(string key, ref ItemWrapper item, ISpawnProvider spawnProvider, ArrayList value = null)
            : base(key, ref item, string.Empty, spawnProvider)
        {
            if (value == null)
            {
                return;
            }

            _value = new NameValueCollection();
            foreach (object val in value)
            {
                if (val is ArrayList)
                {
                    var tmp = val as ArrayList;
                    _value.Add(tmp[0].ToString(), tmp[1].ToString());
                }
            }

            this._rawValue = _value.ToString();
        }

 /// <summary>
 /// Verifies the spawn provider is correctly set up.
 /// </summary>
 /// <param name="spawnProvider"></param>
 /// <returns></returns>
 public static bool VerifySpawnProvider(ISpawnProvider spawnProvider)
 {
     return spawnProvider != null && spawnProvider.TemplateMapProvider != null;
 }

        public RenderingParameterWrapper(Dictionary<string, string> parameters, ISpawnProvider spawnProvider)
        {
            _parameters = parameters;

            SpawnProvider = spawnProvider;
        }

 public BooleanFieldWrapper(string key, ref ItemWrapper item, ISpawnProvider spawnProvider, bool value)
     : base(key, ref item, value ? "1" : "", spawnProvider)
 {
     _boolean = value;
 }

 public OrderingOptions(Dictionary<string, string> parameters, ISpawnProvider spawnProvider)
     : base(parameters, spawnProvider)
 {
 }

 public RulesFieldWrapper(string key, ref ItemWrapper item, ISpawnProvider spawnProvider, string value = null)
     : base(key, ref item, value, spawnProvider)
 {
 }

 public IntegerFieldWrapper(string key, ref ItemWrapper item, ISpawnProvider spawnProvider, long value)
     : base(key, ref item, value.ToString(), spawnProvider)
 {
     _value = value;
 }

        public FieldWrapper(string value, ISpawnProvider spawnProvider)
        {
            _value = value;

            SpawnProvider = spawnProvider;
        }

 public FileFieldWrapper(Field field, ISpawnProvider spawnProvider)
     : base(field, spawnProvider)
 {
 }

 public CallToActionListOptions(Dictionary<string, string> parameters, ISpawnProvider spawnProvider)
     : base(parameters, spawnProvider)
 {
 }

 public ContentPage(Guid id, Dictionary<string, object> lazyFields, ISpawnProvider spawnProvider)
     : base(id, lazyFields, spawnProvider)
 {
 }

 public NavigationLink(Item item, ISpawnProvider spawnProvider)
     : base(item, spawnProvider)
 {
     _item = item;
 }

 public BooleanFieldWrapper(string value, ISpawnProvider spawnProvider)
     : base(value, spawnProvider)
 {
 }

 public NumberFieldWrapper(string key, ref ItemWrapper item, ISpawnProvider spawnProvider, float value)
     : base(key, ref item, value.ToString(), spawnProvider)
 {
     _value = value;
 }

		public CustomItemFactory(IContextProvider contextProvider, ISpawnProvider spawnProvider) 
			: base(contextProvider, spawnProvider)
		{
		}

 public NumberFieldWrapper(string value, ISpawnProvider spawnProvider)
     : base(value, spawnProvider)
 {
 }

 public void Initialise()
 {
     // Create mock objects
     _modelAssemblyProvider = new ModelAssemblyProvider();
     _templateMappingProvider = new TemplateMapProvider(_modelAssemblyProvider);
     _spawnProvider = new SpawnProvider(_templateMappingProvider);
 }