public void CacheTimesShouldBeInitialisedOnCreation()
{
var cachedToggle = new CacheTestToggle();
var duration = TimeSpan.FromMilliseconds(42);
var sut = new FixedTimeCacheDecorator(cachedToggle, duration, () => new DateTime(2000, 1, 25));
Assert.Equal(new DateTime(2000, 1, 25), sut.CachedValueLastUpdatedTime);
Assert.Equal(new DateTime(2000, 1, 25).Add(duration), sut.CacheExpiryTime);
}
public void RetrieveInitialValueFromWrappedToggle()
{
var cachedToggle = new CacheTestToggle();
cachedToggle.Enable();
var sut = new FixedTimeCacheDecorator(cachedToggle, TimeSpan.FromSeconds(1));
Assert.True(sut.FeatureEnabled);
}
public void MaintainInitialValueWithinCacheDurationEvenWhenUnderlyingToggleValueChanges()
{
var cachedToggle = new CacheTestToggle();
cachedToggle.Enable();
var sut = new FixedTimeCacheDecorator(cachedToggle, TimeSpan.FromSeconds(1));
cachedToggle.Disable();
Assert.True(sut.FeatureEnabled);
}
public void UpdateNewValueAfterCacheExpires()
{
var cachedToggle = new CacheTestToggle();
cachedToggle.Enable();
var creationTime = new DateTime(2000, 1, 25);
const int durationTicks = 1;
var sut = new FixedTimeCacheDecorator(cachedToggle, TimeSpan.FromTicks(durationTicks), () => creationTime);
cachedToggle.Disable();
sut.NowProvider = () => creationTime.AddTicks(durationTicks + 1);
Assert.False(sut.FeatureEnabled);
}
public void CacheTimesShouldBeUpdatedAfterExpiry()
{
var cachedToggle = new CacheTestToggle();
cachedToggle.Enable();
var creationTime = new DateTime(2000, 1, 25);
const int durationTicks = 1;
var sut = new FixedTimeCacheDecorator(cachedToggle, TimeSpan.FromTicks(durationTicks), () => creationTime);
cachedToggle.Disable();
const int passedTimeInTicks = durationTicks + 1;
sut.NowProvider = () => creationTime.AddTicks(passedTimeInTicks);
var dontCare = sut.FeatureEnabled;
Assert.Equal(creationTime.AddTicks(passedTimeInTicks), sut.CachedValueLastUpdatedTime);
Assert.Equal(creationTime.AddTicks(passedTimeInTicks).AddTicks(durationTicks), sut.CacheExpiryTime);
}