public static async Task GetOrAddAsync_TwoTimesCalledWithNoDateTimeExpire_ResultAlwaysTheSameAndGetValueFuncCalledOneTime(ICache <int, string> cache)
{
const string testValue = "Test1";
var getValueCalled = false;
var getValueCalled1 = false;
var getValueCalled2 = false;
var value = await cache.GetOrAddAsync(1, () =>
{
getValueCalled = true;
return(testValue);
}, CacheExpirationPolicy.AfterAbsoluteDateTime(DateTime.Now.AddMilliseconds(400))).ConfigureAwait(false);
Assert.Equal(testValue, value);
await Task.Delay(50).ConfigureAwait(false);
var secondValue = await cache.GetOrAddAsync(1, () =>
{
getValueCalled1 = true;
return(testValue);
}, CacheExpirationPolicy.AfterAbsoluteDateTime(DateTime.Now.AddMilliseconds(400))).ConfigureAwait(false);
await Task.Delay(400).ConfigureAwait(false);
var thirdValue = await cache.GetOrAddAsync(1, () =>
{
getValueCalled2 = true;
return(testValue);
}, CacheExpirationPolicy.AfterAbsoluteDateTime(DateTime.Now.AddMilliseconds(200))).ConfigureAwait(false);
Assert.Equal(testValue, secondValue);
Assert.Equal(testValue, thirdValue);
Assert.True(getValueCalled);
Assert.False(getValueCalled1);
Assert.True(getValueCalled2);
}
public static async Task GetOrAddAsync_TwoTimesCalledWithDateTimeExpire_ResultAlwaysTheSameAndGetValueFuncCalledTwoTime(ICache <int, string> cache)
{
const string testValue = "Test1";
var getValueCalledCount = 0;
var value = await cache.GetOrAddAsync(1, () =>
{
getValueCalledCount++;
return(testValue);
}, CacheExpirationPolicy.AfterAbsoluteDateTime(DateTime.Now.AddMilliseconds(50))).ConfigureAwait(false);
Assert.Equal(testValue, value);
await Task.Delay(100).ConfigureAwait(false);
var secondValue = await cache.GetOrAddAsync(1, () =>
{
getValueCalledCount++;
return(testValue);
}, CacheExpirationPolicy.NeverExpire).ConfigureAwait(false);
Assert.Equal(testValue, secondValue);
Assert.Equal(2, getValueCalledCount);
}