public static async Task GetByKeyAsync_WhenCalledTwiceWithSameKey_InvokesFactoryOnlyOnce()
{
var counter = 0;
var cache = new AsyncCache <string, string, string>((string key, string cache, CancellationToken cancellationToken) =>
{
counter++;
return(Task.FromResult(string.Empty));
});
await cache.GetByKeyAsync("a", "cache_ignore").ConfigureAwait(false);
await cache.GetByKeyAsync("a", "cache_ignore").ConfigureAwait(false);
Assert.That(counter, Is.EqualTo(1));
}
public static void GetByKeyAsync_GivenNullCache_ThrowsArgumentNullException()
{
var cache = new AsyncCache <object, object, object>((object key, object cache, CancellationToken cancellationToken) => Task.FromResult(new object()));
Assert.That(() => cache.GetByKeyAsync(new object(), null), Throws.ArgumentNullException);
}