public void With69ElementsAndPageSize10_GetAnElementFromEachPageDisposeCollection_AllDisposed(
PageLoadingBehavior pageLoadingBehavior,
PageRemovalBehavior pageRemovalBehavior,
FetchersKind fetchersKind,
IndexAccessBehavior indexAccessBehavior)
{
// Arrange
const int expected = 69;
var set = new ConcurrentBag <int>();
var collection = DataVirtualizingCollectionFactory.CreateCollectionWithCustomPageFetchingLogic(
pageLoadingBehavior,
pageRemovalBehavior,
fetchersKind,
indexAccessBehavior,
expected,
10,
(offset, pSize) =>
Enumerable
.Range(offset, pSize)
.Select(i => Disposable.Create(() => set.Add(i)))
.ToArray(),
Disposable.Empty);
// Act
for (var i = 0; i <= expected; i += 10)
{
var _ = collection[i];
}
collection.Dispose();
Thread.Sleep(500);
// Assert
Assert.Equal(expected, set.Count);
}
public async Task BuildingCollectionWith6969Elements_Offset69SlidingRight_Offset70(
PageLoadingBehavior pageLoadingBehavior,
PageRemovalBehavior pageRemovalBehavior,
FetchersKind fetchersKind,
IndexAccessBehavior indexAccessBehavior)
{
// Arrange
var scheduler = new TestScheduler();
await using var collection = SlidingWindowFactory.CreateCollectionWithIncrementalInteger(
pageLoadingBehavior,
pageRemovalBehavior,
fetchersKind,
indexAccessBehavior,
6969,
10,
10,
69,
scheduler);
await collection.InitializationCompleted;
// Act
collection.SlideRight();
var _ = collection[0];
await Task.Delay(50);
// Assert
Assert.Equal(70, collection[0]);
}
public async Task BuildingCollectionWith6969Elements_124thEntry_123(
PageLoadingBehavior pageLoadingBehavior,
PageRemovalBehavior pageRemovalBehavior,
FetchersKind fetchersKind,
IndexAccessBehavior indexAccessBehavior)
{
// Arrange
using var collection = DataVirtualizingCollectionFactory.CreateCollectionWithIncrementalInteger(
pageLoadingBehavior,
pageRemovalBehavior,
fetchersKind,
indexAccessBehavior,
6969,
100);
await collection.InitializationCompleted;
// Act
var placeholder = collection[123];
await Task.Delay(50);
// Assert
Assert.Equal(-1, placeholder);
Assert.Equal(123, collection[123]);
}
public async Task BuildingCollectionWith6969Elements_Offset69WindowSize10IncreaseBy2_CountIncreasedLastElement80(
PageLoadingBehavior pageLoadingBehavior,
PageRemovalBehavior pageRemovalBehavior,
FetchersKind fetchersKind,
IndexAccessBehavior indexAccessBehavior)
{
// Arrange
var scheduler = new TestScheduler();
await using var collection = SlidingWindowFactory.CreateCollectionWithIncrementalInteger(
pageLoadingBehavior,
pageRemovalBehavior,
fetchersKind,
indexAccessBehavior,
6969,
10,
10,
69,
scheduler);
// Act
collection.IncreaseWindowSizeBy(2);
Thread.Sleep(500); // wait for preloading
// Assert
Assert.Equal(12, collection.Count);
Assert.Equal(80, collection[11]);
}
public async Task BuildingCollectionWith6969Elements_Offset69WindowSize10Decrease_CountDecreasedLastElement77(
PageLoadingBehavior pageLoadingBehavior,
PageRemovalBehavior pageRemovalBehavior,
FetchersKind fetchersKind,
IndexAccessBehavior indexAccessBehavior)
{
// Arrange
var scheduler = new TestScheduler();
await using var collection = SlidingWindowFactory.CreateCollectionWithIncrementalInteger(
pageLoadingBehavior,
pageRemovalBehavior,
fetchersKind,
indexAccessBehavior,
6969,
10,
10,
69,
scheduler);
// Act
collection.DecreaseWindowSize();
Thread.Sleep(500); // wait for preloading
// Assert
Assert.Equal(9, collection.Count);
Assert.Equal(77, collection[8]);
Assert.Throws <IndexOutOfRangeException>(() => collection[9]);
}
public async Task BuildingCollectionWith6969Elements_Offset0SlidingLeft_Offset0(
PageLoadingBehavior pageLoadingBehavior,
PageRemovalBehavior pageRemovalBehavior,
FetchersKind fetchersKind,
IndexAccessBehavior indexAccessBehavior)
{
// Arrange
var scheduler = new TestScheduler();
await using var collection = SlidingWindowFactory.CreateCollectionWithIncrementalInteger(
pageLoadingBehavior,
pageRemovalBehavior,
fetchersKind,
indexAccessBehavior,
6969,
10,
10,
0,
scheduler);
// Act
collection.SlideLeft();
// Assert
Assert.Equal(0, collection[0]);
}
public void BuildingCollectionWith6969Elements_Reset_SwitchedCountFetchingOffsetAdjusted(
PageLoadingBehavior pageLoadingBehavior,
PageRemovalBehavior pageRemovalBehavior,
FetchersKind fetchersKind,
IndexAccessBehavior indexAccessBehavior)
{
// Arrange
bool switched = false;
int CountFetcher() =>
switched
? 70
: 6969;
using var collection = SlidingWindowFactory.CreateCollectionWithCustomCountFetcher(
pageLoadingBehavior,
pageRemovalBehavior,
fetchersKind,
indexAccessBehavior,
CountFetcher,
10,
10,
69);
var previous = collection[0];
switched = true;
// Act
collection.Reset();
// Assert
Assert.Equal(69, previous);
Assert.Equal(60, collection[0]);
}
public void BuildingCollectionWith6969Elements_Offset69WindowSize10DecreaseBy2_CountDecreasedLastElement76(
PageLoadingBehavior pageLoadingBehavior,
PageRemovalBehavior pageRemovalBehavior,
FetchersKind fetchersKind,
IndexAccessBehavior indexAccessBehavior)
{
// Arrange
using var collection = SlidingWindowFactory.CreateCollectionWithIncrementalInteger(
pageLoadingBehavior,
pageRemovalBehavior,
fetchersKind,
indexAccessBehavior,
6969,
10,
10,
69);
// Act
collection.DecreaseWindowSizeBy(2);
Thread.Sleep(500); // wait for preloading
// Assert
Assert.Equal(8, collection.Count);
Assert.Equal(76, collection[7]);
Assert.Throws <IndexOutOfRangeException>(() => collection[8]);
}
public async Task BuildingCollectionWith6969Elements_Offset6959WindowSize10Increase_CountIncreasedLastElement6968(
PageLoadingBehavior pageLoadingBehavior,
PageRemovalBehavior pageRemovalBehavior,
FetchersKind fetchersKind,
IndexAccessBehavior indexAccessBehavior)
{
// Arrange
var scheduler = new TestScheduler();
await using var collection = SlidingWindowFactory.CreateCollectionWithIncrementalInteger(
pageLoadingBehavior,
pageRemovalBehavior,
fetchersKind,
indexAccessBehavior,
6969,
10,
10,
6959,
scheduler);
await collection.InitializationCompleted;
// Act
collection.IncreaseWindowSize();
var _ = collection[10];
await Task.Delay(50);
// Assert
Assert.Equal(11, collection.Count);
Assert.Equal(6968, collection[10]);
}
public async Task BuildingCollectionWith6969Elements_Offset69WindowSize10IncreaseBy2_CountIncreasedLastElement80(
PageLoadingBehavior pageLoadingBehavior,
PageRemovalBehavior pageRemovalBehavior,
FetchersKind fetchersKind,
IndexAccessBehavior indexAccessBehavior)
{
// Arrange
using var collection = SlidingWindowFactory.CreateCollectionWithIncrementalInteger(
pageLoadingBehavior,
pageRemovalBehavior,
fetchersKind,
indexAccessBehavior,
6969,
10,
10,
69);
await collection.InitializationCompleted;
// Act
collection.IncreaseWindowSizeBy(2);
var _ = collection[11];
await Task.Delay(50);
// Assert
Assert.Equal(12, collection.Count);
Assert.Equal(80, collection[11]);
}
public async Task BuildingCollectionWith6969Elements_Offset69WindowSize10DecreaseBy2_CountDecreasedLastElement76(
PageLoadingBehavior pageLoadingBehavior,
PageRemovalBehavior pageRemovalBehavior,
FetchersKind fetchersKind,
IndexAccessBehavior indexAccessBehavior)
{
// Arrange
var scheduler = new TestScheduler();
await using var collection = SlidingWindowFactory.CreateCollectionWithIncrementalInteger(
pageLoadingBehavior,
pageRemovalBehavior,
fetchersKind,
indexAccessBehavior,
6969,
10,
10,
69,
scheduler);
await collection.InitializationCompleted;
// Act
collection.DecreaseWindowSizeBy(2);
var _ = collection[7];
await Task.Delay(50);
// Assert
Assert.Equal(8, collection.Count);
Assert.Equal(76, collection[7]);
Assert.Throws <IndexOutOfRangeException>(() => collection[8]);
}
public async Task BuildingCollectionWherePageFetcherIgnoresGivenPageSize23_70thEntry_69(
PageLoadingBehavior pageLoadingBehavior,
PageRemovalBehavior pageRemovalBehavior,
FetchersKind fetchersKind,
IndexAccessBehavior indexAccessBehavior)
{
// Arrange
using var collection = DataVirtualizingCollectionFactory.CreateCollectionWithIncrementalIntegerWhereFetchersIgnorePageSize(
pageLoadingBehavior,
pageRemovalBehavior,
fetchersKind,
indexAccessBehavior,
6969,
23);
await collection.InitializationCompleted;
// Act
var placeholder = collection[69];
await Task.Delay(50);
// Assert
Assert.Equal(-1, placeholder);
Assert.Equal(69, collection[69]);
}
public async Task BuildingCollectionWith6969Elements_124thEntry_123(
PageLoadingBehavior pageLoadingBehavior,
PageRemovalBehavior pageRemovalBehavior,
FetchersKind fetchersKind,
IndexAccessBehavior indexAccessBehavior)
{
// Arrange
var scheduler = new TestScheduler();
await using var collection = DataVirtualizingCollectionFactory.CreateCollectionWithIncrementalInteger(
pageLoadingBehavior,
pageRemovalBehavior,
fetchersKind,
indexAccessBehavior,
6969,
100,
scheduler);
scheduler.AdvanceBy(20);
Assert.True(collection.InitializationCompleted.IsCompletedSuccessfully);
// Act
var placeholder = collection[123];
await Task.Delay(TimeSpan.FromMilliseconds(50)).ConfigureAwait(false);
scheduler.AdvanceBy(20);
// Assert
Assert.Equal(-1, placeholder);
Assert.Equal(123, collection[123]);
}
public async Task BuildingCollectionWherePageFetcherIgnoresGivenPageSize23_70thEntry_69(
PageLoadingBehavior pageLoadingBehavior,
PageRemovalBehavior pageRemovalBehavior,
FetchersKind fetchersKind,
IndexAccessBehavior indexAccessBehavior)
{
// Arrange
var scheduler = new TestScheduler();
await using var collection = SlidingWindowFactory.CreateCollectionWithIncrementalIntegerWhereFetchersIgnorePageSize(
pageLoadingBehavior,
pageRemovalBehavior,
fetchersKind,
indexAccessBehavior,
6969,
23,
10,
60,
scheduler);
scheduler.AdvanceBy(20);
Assert.True(collection.InitializationCompleted.IsCompletedSuccessfully);
// Act
var placeholder = collection[9];
await Task.Delay(TimeSpan.FromMilliseconds(50)).ConfigureAwait(false);
scheduler.AdvanceBy(20);
// Assert
Assert.Equal(-1, placeholder);
Assert.Equal(69, collection[9]);
}
public async Task BuildingCollectionWith6969Elements_MinusFirstEntry_ThrowsIndexOutOfRangeException(
PageLoadingBehavior pageLoadingBehavior,
PageRemovalBehavior pageRemovalBehavior,
FetchersKind fetchersKind,
IndexAccessBehavior indexAccessBehavior)
{
// Arrange
var scheduler = new TestScheduler();
await using var collection = SlidingWindowFactory.CreateCollectionWithIncrementalInteger(
pageLoadingBehavior,
pageRemovalBehavior,
fetchersKind,
indexAccessBehavior,
6969,
100,
10,
6959,
scheduler);
scheduler.AdvanceBy(20);
await collection.InitializationCompleted.ConfigureAwait(false);
Assert.True(collection.InitializationCompleted.IsCompletedSuccessfully);
// Act + Assert
Assert.Throws <IndexOutOfRangeException>(() => collection[-1]);
}
public async Task BuildingCollectionWith6969Elements_Reset_NothingChanged(
PageLoadingBehavior pageLoadingBehavior,
PageRemovalBehavior pageRemovalBehavior,
FetchersKind fetchersKind,
IndexAccessBehavior indexAccessBehavior)
{
// Arrange
using var collection = SlidingWindowFactory.CreateCollectionWithIncrementalInteger(
pageLoadingBehavior,
pageRemovalBehavior,
fetchersKind,
indexAccessBehavior,
6969,
10,
10,
69);
await collection.InitializationCompleted;
var _ = collection[0];
await Task.Delay(50);
// Act
collection.Reset();
await Task.Delay(50);
var __ = collection[0];
await Task.Delay(50);
// Assert
Assert.Equal(69, collection[0]);
}
public void BuildingCollectionWith6969Elements_Offset6959WindowSize10Increase_CountIncreasedLastElement6968(
PageLoadingBehavior pageLoadingBehavior,
PageRemovalBehavior pageRemovalBehavior,
FetchersKind fetchersKind,
IndexAccessBehavior indexAccessBehavior)
{
// Arrange
using var collection = SlidingWindowFactory.CreateCollectionWithIncrementalInteger(
pageLoadingBehavior,
pageRemovalBehavior,
fetchersKind,
indexAccessBehavior,
6969,
10,
10,
6959);
// Act
collection.IncreaseWindowSize();
Thread.Sleep(500); // wait for preloading
// Assert
Assert.Equal(11, collection.Count);
Assert.Equal(6968, collection[10]);
}
public void With6969ElementsAndPageSize100_GetAnElementFromEachPage_NoneDisposed(
PageLoadingBehavior pageLoadingBehavior,
PageRemovalBehavior pageRemovalBehavior,
FetchersKind fetchersKind,
IndexAccessBehavior indexAccessBehavior)
{
// Arrange
var set = new ConcurrentBag <int>();
using var collection = DataVirtualizingCollectionFactory.CreateCollectionWithCustomPageFetchingLogic(
pageLoadingBehavior,
pageRemovalBehavior,
fetchersKind,
indexAccessBehavior,
6969,
100,
(offset, pSize) =>
Enumerable
.Range(offset, pSize)
.Select(i => Disposable.Create(() => set.Add(i)))
.ToArray(),
Disposable.Empty);
// Act
for (var i = 0; i <= 6900; i += 100)
{
var _ = collection[i];
}
// Assert
Assert.Empty(set);
}
internal static ISlidingWindow <T> CreateCollectionWithCustomPageFetchingLogicAndCustomLeastRecentlyUsed <T>(
PageLoadingBehavior pageLoadingBehavior,
PageRemovalBehavior pageRemovalBehavior,
FetchersKind fetchersKind,
IndexAccessBehavior indexAccessBehavior,
int count,
int pageSize,
int initialWindowSize,
int initialWindowOffset,
Func <int, int, T[]> pageFetchingLogic,
T placeholder,
int pageLimit,
int removalCount,
IScheduler scheduler)
{
var pageLoadingBehaviorCollectionBuilder = SlidingWindowBuilder.Build <T>(
initialWindowSize,
initialWindowOffset,
pageSize,
new EventLoopScheduler(),
scheduler);
var pageHoldingBehaviorCollectionBuilder =
StandardPageHoldingBehaviorCollectionBuilder(
pageLoadingBehaviorCollectionBuilder,
pageLoadingBehavior,
(_, __) => placeholder);
var fetchersKindCollectionBuilder =
StandardFetcherKindCollectionBuilder(
pageHoldingBehaviorCollectionBuilder,
pageRemovalBehavior,
pageLimit,
removalCount);
var indexAccessBehaviorCollectionBuilder =
StandardIndexAccessBehaviorCollectionBuilder(
fetchersKindCollectionBuilder,
fetchersKind,
pageFetchingLogic,
() => count);
var dataVirtualizingCollection =
StandardDataVirtualizingCollection(
indexAccessBehaviorCollectionBuilder,
indexAccessBehavior,
() => placeholder);
return(dataVirtualizingCollection);
}
internal static ISlidingWindow <int> CreateCollectionWithIncrementalIntegerWhereFetchersIgnorePageSize(
PageLoadingBehavior pageLoadingBehavior,
PageRemovalBehavior pageRemovalBehavior,
FetchersKind fetchersKind,
IndexAccessBehavior indexAccessBehavior,
int count,
int pageSize,
int initialWindowSize,
int initialWindowOffset,
IScheduler scheduler)
{
var pageLoadingBehaviorCollectionBuilder = SlidingWindowBuilder.Build <int>(
initialWindowSize,
initialWindowOffset,
pageSize,
new EventLoopScheduler(),
scheduler);
var pageHoldingBehaviorCollectionBuilder =
StandardPageHoldingBehaviorCollectionBuilder(
pageLoadingBehaviorCollectionBuilder,
pageLoadingBehavior,
(_, __) => - 1);
var fetchersKindCollectionBuilder =
StandardFetcherKindCollectionBuilder(
pageHoldingBehaviorCollectionBuilder,
pageRemovalBehavior,
10,
1);
var indexAccessBehaviorCollectionBuilder =
StandardIndexAccessBehaviorCollectionBuilder(
fetchersKindCollectionBuilder,
fetchersKind,
(offset, pSize) =>
Enumerable
.Range(offset, pageSize) // <--- This is different! pageSize instead of pSize!
.ToArray(),
() => count);
var dataVirtualizingCollection =
StandardDataVirtualizingCollection(
indexAccessBehaviorCollectionBuilder,
indexAccessBehavior,
() => - 1);
return(dataVirtualizingCollection);
}
public async Task BuildingCollectionWith6969Elements_Reset_SwitchedPageFetching(
PageLoadingBehavior pageLoadingBehavior,
PageRemovalBehavior pageRemovalBehavior,
FetchersKind fetchersKind,
IndexAccessBehavior indexAccessBehavior)
{
// Arrange
var scheduler = new TestScheduler();
bool switched = false;
int[] PageFetcher(int offset, int size) =>
switched
? Enumerable.Range(offset + 1, size).ToArray()
: Enumerable.Range(offset, size).ToArray();
await using var collection = SlidingWindowFactory.CreateCollectionWithCustomPageFetchingLogic(
pageLoadingBehavior,
pageRemovalBehavior,
fetchersKind,
indexAccessBehavior,
6969,
10,
10,
69,
PageFetcher,
-1,
scheduler);
await collection.InitializationCompleted;
var _ = collection[0];
await Task.Delay(50);
switched = true;
// Act
collection.Reset();
await Task.Delay(50);
var __ = collection[0];
await Task.Delay(50);
// Assert
Assert.Equal(70, collection[0]);
}
internal static ISlidingWindow <int> CreateCollectionWithCustomCountFetcher(
PageLoadingBehavior pageLoadingBehavior,
PageRemovalBehavior pageRemovalBehavior,
FetchersKind fetchersKind,
IndexAccessBehavior indexAccessBehavior,
Func <int> countFetcher,
int pageSize,
int initialWindowSize,
int initialWindowOffset,
IScheduler scheduler)
{
var pageLoadingBehaviorCollectionBuilder = SlidingWindowBuilder.Build <int>(
initialWindowSize,
initialWindowOffset, pageSize,
new EventLoopScheduler(),
scheduler);
var pageHoldingBehaviorCollectionBuilder =
StandardPageHoldingBehaviorCollectionBuilder(
pageLoadingBehaviorCollectionBuilder,
pageLoadingBehavior,
(_, __) => - 1);
var fetchersKindCollectionBuilder =
StandardFetcherKindCollectionBuilder(
pageHoldingBehaviorCollectionBuilder,
pageRemovalBehavior,
10,
1);
var indexAccessBehaviorCollectionBuilder =
StandardIndexAccessBehaviorCollectionBuilder(
fetchersKindCollectionBuilder,
fetchersKind,
(offset, pSize) =>
Enumerable
.Range(offset, pSize)
.ToArray(),
countFetcher);
var dataVirtualizingCollection =
StandardDataVirtualizingCollection(
indexAccessBehaviorCollectionBuilder,
indexAccessBehavior,
() => - 1);
return(dataVirtualizingCollection);
}
public async Task With69ElementsAndPageSize10_GetAnElementFromEachPageDisposeCollection_AllDisposed(
PageLoadingBehavior pageLoadingBehavior,
PageRemovalBehavior pageRemovalBehavior,
FetchersKind fetchersKind,
IndexAccessBehavior indexAccessBehavior)
{
// Arrange
var scheduler = new TestScheduler();
const int expected = 69;
var set = new ConcurrentBag <int>();
var collection = DataVirtualizingCollectionFactory.CreateCollectionWithCustomPageFetchingLogic(
pageLoadingBehavior,
pageRemovalBehavior,
fetchersKind,
indexAccessBehavior,
expected,
10,
(offset, pSize) =>
Enumerable
.Range(offset, pSize)
.Select(i => Disposable.Create(() => set.Add(i)))
.ToArray(),
Disposable.Empty,
scheduler);
scheduler.AdvanceBy(20);
Assert.True(collection.InitializationCompleted.IsCompletedSuccessfully);
// Act
for (var i = 0; i <= expected; i += 10)
{
var _ = collection[i];
await Task.Delay(TimeSpan.FromMilliseconds(50)).ConfigureAwait(false);
scheduler.AdvanceBy(20);
}
await collection.DisposeAsync();
await Task.Delay(TimeSpan.FromMilliseconds(50)).ConfigureAwait(false);
scheduler.AdvanceBy(20);
// Assert
Assert.Equal(expected, set.Count);
}
public void BuildingCollectionWith6969Elements_MinusFirstEntry_ThrowsIndexOutOfRangeException(
PageLoadingBehavior pageLoadingBehavior,
PageRemovalBehavior pageRemovalBehavior,
FetchersKind fetchersKind,
IndexAccessBehavior indexAccessBehavior)
{
// Arrange
using var collection = DataVirtualizingCollectionFactory.CreateCollectionWithIncrementalInteger(
pageLoadingBehavior,
pageRemovalBehavior,
fetchersKind,
indexAccessBehavior,
6969,
100);
// Act + Assert
Assert.Throws <IndexOutOfRangeException>(() => collection[-1]);
}
public void BuildingCollectionWith6969Elements_6001thEntry_6000(
PageLoadingBehavior pageLoadingBehavior,
PageRemovalBehavior pageRemovalBehavior,
FetchersKind fetchersKind,
IndexAccessBehavior indexAccessBehavior)
{
// Arrange
using var collection = DataVirtualizingCollectionFactory.CreateCollectionWithIncrementalInteger(
pageLoadingBehavior,
pageRemovalBehavior,
fetchersKind,
indexAccessBehavior,
6969,
100);
// Act + Assert
Assert.Equal(6000, collection[6000]);
}
public void BuildingCollectionWherePageFetcherIgnoresGivenPageSize23_70thEntry_69(
PageLoadingBehavior pageLoadingBehavior,
PageRemovalBehavior pageRemovalBehavior,
FetchersKind fetchersKind,
IndexAccessBehavior indexAccessBehavior)
{
// Arrange
using var collection = DataVirtualizingCollectionFactory.CreateCollectionWithIncrementalIntegerWhereFetchersIgnorePageSize(
pageLoadingBehavior,
pageRemovalBehavior,
fetchersKind,
indexAccessBehavior,
6969,
23);
// Act + Assert
Assert.Equal(69, collection[69]);
}
public async Task BuildingCollectionWith6969Elements_Reset_SwitchedCountFetchingCountAdjusted(
PageLoadingBehavior pageLoadingBehavior,
PageRemovalBehavior pageRemovalBehavior,
FetchersKind fetchersKind,
IndexAccessBehavior indexAccessBehavior)
{
// Arrange
var scheduler = new TestScheduler();
bool switched = false;
int CountFetcher() =>
switched
? 9
: 6969;
await using var collection = SlidingWindowFactory.CreateCollectionWithCustomCountFetcher(
pageLoadingBehavior,
pageRemovalBehavior,
fetchersKind,
indexAccessBehavior,
CountFetcher,
10,
10,
69,
scheduler);
await collection.InitializationCompleted;
var _ = collection[0];
await Task.Delay(50);
switched = true;
// Act
collection.Reset();
await Task.Delay(50);
var __ = collection[0];
await Task.Delay(50);
// Assert
Assert.Equal(0, collection[0]);
Assert.Equal(9, collection.Count);
}
internal static IDataVirtualizingCollection <int> CreateCollectionWithIncrementalInteger(
PageLoadingBehavior pageLoadingBehavior,
PageRemovalBehavior pageRemovalBehavior,
FetchersKind fetchersKind,
IndexAccessBehavior indexAccessBehavior,
int count,
int pageSize,
IScheduler scheduler)
{
var pageLoadingBehaviorCollectionBuilder = DataVirtualizingCollectionBuilder.Build <int>(
pageSize,
new EventLoopScheduler(),
scheduler);
var pageHoldingBehaviorCollectionBuilder =
StandardPageHoldingBehaviorCollectionBuilder(
pageLoadingBehaviorCollectionBuilder,
pageLoadingBehavior,
(_, __) => - 1);
var fetchersKindCollectionBuilder =
StandardFetcherKindCollectionBuilder(
pageHoldingBehaviorCollectionBuilder,
pageRemovalBehavior,
10,
1);
var indexAccessBehaviorCollectionBuilder =
StandardIndexAccessBehaviorCollectionBuilder(
fetchersKindCollectionBuilder,
fetchersKind,
(offset, pSize) =>
Enumerable
.Range(offset, pSize)
.ToArray(),
() => count);
var dataVirtualizingCollection =
StandardDataVirtualizingCollection(
indexAccessBehaviorCollectionBuilder,
indexAccessBehavior,
() => - 1);
return(dataVirtualizingCollection);
}
public void BuildingCollectionWith6969Elements_124thEntry_123(
PageLoadingBehavior pageLoadingBehavior,
PageRemovalBehavior pageRemovalBehavior,
FetchersKind fetchersKind,
IndexAccessBehavior indexAccessBehavior)
{
// Arrange
using var collection = SlidingWindowFactory.CreateCollectionWithIncrementalInteger(
pageLoadingBehavior,
pageRemovalBehavior,
fetchersKind,
indexAccessBehavior,
6969,
100,
10,
120);
// Act + Assert
Assert.Equal(123, collection[3]);
}
public async Task BuildingCollectionWith6969Elements_6970thEntry_ThrowsIndexOutOfRangeException(
PageLoadingBehavior pageLoadingBehavior,
PageRemovalBehavior pageRemovalBehavior,
FetchersKind fetchersKind,
IndexAccessBehavior indexAccessBehavior)
{
// Arrange
using var collection = DataVirtualizingCollectionFactory.CreateCollectionWithIncrementalInteger(
pageLoadingBehavior,
pageRemovalBehavior,
fetchersKind,
indexAccessBehavior,
6969,
100);
await collection.InitializationCompleted;
// Act + Assert
Assert.Throws <IndexOutOfRangeException>(() => collection[6969]);
}
