TailBlazer.Views.Formatting.ColourProvider.Lookup C# (CSharp) Method

        public Optional<Hue> Lookup(HueKey key)
        {
            if (null == key.Name || null == key.Swatch)
                return new Optional<Hue>();

            return HueCache.Lookup(key);
        }

        public void ColourProviderLookupWithNullKeyShouldReturnEmptyValue()
        {
            var provider = new ColourProvider();
            HueKey key;
            var result = provider.Lookup(key);

            result.HasValue.Should().Be(false);
        }