public async Task Autocomplete_returns_full_postcodes_for_partial_async()
        {
            var result = (await _client.AutocompleteAsync("GU1 1A")).ToList();

            Assert.True(result.Any());
            Assert.True(result.Contains("GU1 1AA"));
        }
        public async Task <IEnumerable <string> > AutoCompleteAsync(string postcode)
        {
            PostcodesIOClient client = new PostcodesIOClient();

            var result = await client.AutocompleteAsync(postcode);

            return(result);
        }