public async Task AwaitPatternWithEmptySet()
{
var x = await Observe.Empty <int>();
Assert.AreEqual(0, x);
var y = await Observe.Empty <string>();
Assert.AreEqual(null, y);
}
public Observe <T> GetDeserializedCachedAndRefreshedAsync <T>(Uri url, string cacheFile) where T : class
{
Observe <T> sequence = Observe.Empty <T>();
if (this.storage.Exists(cacheFile))
{
sequence = this.storage.LoadJsonAsync <T>(cacheFile);
}
return(sequence.Concat(
from cache in this.GetStreamAsync(url, false).Select(Json <T> .Instance.DeserializeFromStream)
from _ in this.storage.SaveJsonAsync(cacheFile, cache)
select cache));
}
public void SelectNone()
{
Observe.Empty <int>().Select(t => t)(set => Assert.IsFalse(set.HasValue));
}