public void MappingDummyProvider(IMapping map)
{
var providers = map.GetFieldsWithProviders;
var result = map.Dummy("Text", 30);
var provider = providers.FirstOrDefault();
Assert.Equal(map, result);
Assert.Equal("Text", provider.Key);
Assert.Equal(ProviderType.DummyText, provider.Value.Type);
Assert.Equal(typeof(string), provider.Value.TType);
Assert.Equal(30, ((DummyTextProvider)provider.Value).MaxLength);
}