public void CreatePageLimit10RemovalCount1_Request11Pages_FirstPageRemovalRequest(bool isPreloading)
{
// Arrange
var timestampCount = 0;
var timestampProvider = Substitute.For <ITimestampProvider>();
timestampProvider.Now.Returns(_ => DateTime.MinValue + TimeSpan.FromTicks(1) * timestampCount++);
var requestedRemovals = new List <int>();
using var pageRequests = new Subject <(int PageKey, int PageIndex)>();
// Act
using var subscription = LeastRecentlyUsedPageRemoval
.Create(
10,
1,
isPreloading,
timestampProvider)
(pageRequests)
.Subscribe(removals => requestedRemovals.AddRange(removals));
for (var i = 0; i < 11; i++)
{
pageRequests.OnNext((i, 0));
}
// Assert
Assert.Collection(
requestedRemovals,
pageKey => Assert.Equal(0, pageKey));
}
public void CreatePageLimit10RemovalCount1_Request10PagesAndIterateThemAgain_NeverRequestsRemoval(bool isPreloading)
{
// Arrange
var timestampCount = 0;
var timestampProvider = Substitute.For <ITimestampProvider>();
timestampProvider.Now.Returns(_ => DateTime.MinValue + TimeSpan.FromTicks(1) * timestampCount++);
var requestedRemovals = new List <int>();
using var pageRequests = new Subject <(int PageKey, int PageIndex)>();
// Act
using var subscription = LeastRecentlyUsedPageRemoval
.Create(
10,
1,
isPreloading,
timestampProvider)
(pageRequests)
.Subscribe(removals => requestedRemovals.AddRange(removals));
for (var i = 0; i < 10; i++)
{
pageRequests.OnNext((i, 0));
}
for (var i = 9; i >= 0; i--)
{
pageRequests.OnNext((i, 0));
}
// Assert
Assert.Empty(requestedRemovals);
}
