Features that enable based on a date

[DustinKingen]

Hi Max,

I am wondering what the preferred method is for extending this framework to support Features that are enabled after some DateTime:

For example:

Configure the DateTime when the feature should start.

Features
    .Are
    .ConfiguredBy
    .Custom(featureName => new DateTime(2017, 1, 1));

Check the feature is enabled.

Feature<Sample>.Is().EnabledOn(new DateTime(2017, 1, 2)) // Returns true
Feature<Sample>.Is().EnabledNow() // Returns false when DateTime.Now is before 2017

[mexx]

Hi Dustin,

Given you don't need to configure the timestamps to check against, I wouldn't add the additional functionality at the check side, it would still looks like Feature<Sample>.Is().Enabled. You can easily add a behavior function for temporal checks.

If you have to check against different timestamps, I would use FeatureSwitcher.Contexteer and put the timestamp to check against as a property into the IContext instance. You can reuse the same behavior function for temporal checks, parametrized by the timestamp from the context instead of DateTime.Now.