public void PopularityTransfersAreNotTransitive()
{
PopularityTransfer = 1;
DownloadData.SetDownloadCount("A", "1.0.0", 100);
DownloadData.SetDownloadCount("B", "1.0.0", 100);
DownloadData.SetDownloadCount("C", "1.0.0", 100);
DownloadChanges["A"] = 100;
PopularityTransfers.AddTransfer("A", "B");
PopularityTransfers.AddTransfer("B", "C");
var result = Target.UpdateDownloadTransfers(
DownloadData,
DownloadChanges,
OldTransfers,
PopularityTransfers);
// A transfers downloads to B.
// B transfers downloads to C.
// B and C should reject downloads from A.
Assert.Equal(new[] { "A", "B" }, result.Keys);
Assert.Equal(0, result["A"]);
Assert.Equal(0, result["B"]);
}
public void RemovesIncomingPopularityTransfer()
{
// A used to transfer to both B and C.
// A now transfers to just B.
PopularityTransfer = 1;
DownloadData.SetDownloadCount("A", "1.0.0", 100);
DownloadData.SetDownloadCount("B", "1.0.0", 5);
DownloadData.SetDownloadCount("C", "1.0.0", 0);
PopularityTransfers.AddTransfer("A", "B");
TransferChanges["A"] = new[] { "B" };
OldTransfers.AddTransfer("A", "B");
OldTransfers.AddTransfer("A", "C");
var result = Target.UpdateDownloadTransfers(
DownloadData,
DownloadChanges,
OldTransfers,
PopularityTransfers);
Assert.Equal(new[] { "A", "B", "C" }, result.Keys);
Assert.Equal(0, result["A"]);
Assert.Equal(105, result["B"]);
Assert.Equal(0, result["C"]);
}
public void PackageWithOutgoingTransferRejectsIncomingTransfer()
{
PopularityTransfer = 1;
DownloadData.SetDownloadCount("A", "1.0.0", 100);
DownloadData.SetDownloadCount("B", "1.0.0", 0);
DownloadData.SetDownloadCount("C", "1.0.0", 0);
DownloadChanges["A"] = 100;
PopularityTransfers.AddTransfer("A", "B");
PopularityTransfers.AddTransfer("A", "C");
PopularityTransfers.AddTransfer("B", "C");
var result = Target.UpdateDownloadTransfers(
DownloadData,
DownloadChanges,
OldTransfers,
PopularityTransfers);
// B has incoming and outgoing popularity transfers. It should reject the incoming transfer.
Assert.Equal(new[] { "A", "B", "C" }, result.Keys);
Assert.Equal(0, result["A"]);
Assert.Equal(0, result["B"]);
Assert.Equal(50, result["C"]);
}
public void OutgoingTransfersNewDownloads()
{
PopularityTransfer = 1;
DownloadData.SetDownloadCount("A", "1.0.0", 100);
DownloadData.SetDownloadCount("B", "1.0.0", 20);
DownloadData.SetDownloadCount("C", "1.0.0", 1);
DownloadChanges["A"] = 100;
PopularityTransfers.AddTransfer("A", "C");
PopularityTransfers.AddTransfer("B", "C");
var result = Target.UpdateDownloadTransfers(
DownloadData,
DownloadChanges,
OldTransfers,
PopularityTransfers);
// C receives downloads from A and B
// A has download changes
// B has no changes
Assert.Equal(new[] { "A", "C" }, result.Keys);
Assert.Equal(0, result["A"]);
Assert.Equal(121, result["C"]);
}
public void UnknownPackagesTransferZeroDownloads()
{
PopularityTransfer = 1;
PopularityTransfers.AddTransfer("A", "B");
var result = Target.InitializeDownloadTransfers(
DownloadData,
PopularityTransfers);
Assert.Equal(new[] { "A", "B" }, result.Keys);
Assert.Equal(0, result["A"]);
Assert.Equal(0, result["B"]);
}
public void PopularityTransferRoundsDown()
{
PopularityTransfer = 0.5;
DownloadData.SetDownloadCount("A", "1.0.0", 3);
DownloadData.SetDownloadCount("B", "1.0.0", 0);
PopularityTransfers.AddTransfer("A", "B");
var result = Target.InitializeDownloadTransfers(
DownloadData,
PopularityTransfers);
Assert.Equal(new[] { "A", "B" }, result.Keys);
Assert.Equal(1, result["A"]);
Assert.Equal(1, result["B"]);
}
public void DoesNothingIfNoChanges()
{
PopularityTransfer = 0.5;
DownloadData.SetDownloadCount("A", "1.0.0", 100);
DownloadData.SetDownloadCount("B", "1.0.0", 5);
PopularityTransfers.AddTransfer("A", "B");
var result = Target.UpdateDownloadTransfers(
DownloadData,
DownloadChanges,
OldTransfers,
PopularityTransfers);
Assert.Empty(result);
}
public void SupportsZeroPopularityTransfer()
{
PopularityTransfer = 0;
DownloadData.SetDownloadCount("A", "1.0.0", 100);
DownloadData.SetDownloadCount("B", "1.0.0", 5);
PopularityTransfers.AddTransfer("A", "B");
var result = Target.InitializeDownloadTransfers(
DownloadData,
PopularityTransfers);
Assert.Equal(new[] { "A", "B" }, result.Keys);
Assert.Equal(100, result["A"]);
Assert.Equal(5, result["B"]);
}
public void RejectsCyclicalPopularityTransfers()
{
PopularityTransfer = 1;
DownloadData.SetDownloadCount("A", "1.0.0", 100);
DownloadData.SetDownloadCount("B", "1.0.0", 100);
PopularityTransfers.AddTransfer("A", "B");
PopularityTransfers.AddTransfer("B", "A");
var result = Target.InitializeDownloadTransfers(
DownloadData,
PopularityTransfers);
Assert.Equal(new[] { "A", "B" }, result.Keys);
Assert.Equal(0, result["A"]);
Assert.Equal(0, result["B"]);
}
public void SplitsPopularity()
{
PopularityTransfer = 0.5;
DownloadData.SetDownloadCount("A", "1.0.0", 100);
DownloadData.SetDownloadCount("B", "1.0.0", 5);
DownloadData.SetDownloadCount("C", "1.0.0", 1);
PopularityTransfers.AddTransfer("A", "B");
PopularityTransfers.AddTransfer("A", "C");
var result = Target.InitializeDownloadTransfers(
DownloadData,
PopularityTransfers);
Assert.Equal(new[] { "A", "B", "C" }, result.Keys);
Assert.Equal(50, result["A"]);
Assert.Equal(30, result["B"]);
Assert.Equal(26, result["C"]);
}
public void AcceptsPopularityFromMultipleSources()
{
PopularityTransfer = 1;
DownloadData.SetDownloadCount("A", "1.0.0", 100);
DownloadData.SetDownloadCount("B", "1.0.0", 20);
DownloadData.SetDownloadCount("C", "1.0.0", 1);
PopularityTransfers.AddTransfer("A", "C");
PopularityTransfers.AddTransfer("B", "C");
var result = Target.InitializeDownloadTransfers(
DownloadData,
PopularityTransfers);
Assert.Equal(new[] { "A", "B", "C" }, result.Keys);
Assert.Equal(0, result["A"]);
Assert.Equal(0, result["B"]);
Assert.Equal(121, result["C"]);
}
public void NewOrUpdatedPopularityTransfer()
{
PopularityTransfer = 1;
DownloadData.SetDownloadCount("A", "1.0.0", 100);
DownloadData.SetDownloadCount("B", "1.0.0", 5);
PopularityTransfers.AddTransfer("A", "B");
TransferChanges["A"] = new[] { "B" };
var result = Target.UpdateDownloadTransfers(
DownloadData,
DownloadChanges,
OldTransfers,
PopularityTransfers);
Assert.Equal(new[] { "A", "B" }, result.Keys);
Assert.Equal(0, result["A"]);
Assert.Equal(105, result["B"]);
}
public void IncomingTransfersAddedToNewDownloads()
{
PopularityTransfer = 1;
DownloadData.SetDownloadCount("A", "1.0.0", 100);
DownloadData.SetDownloadCount("B", "1.0.0", 5);
DownloadData.SetDownloadCount("C", "1.0.0", 0);
DownloadChanges["B"] = 5;
PopularityTransfers.AddTransfer("A", "B");
PopularityTransfers.AddTransfer("A", "C");
var result = Target.UpdateDownloadTransfers(
DownloadData,
DownloadChanges,
OldTransfers,
PopularityTransfers);
// B has new downloads and receives downloads from A.
Assert.Equal(new[] { "B" }, result.Keys);
Assert.Equal(55, result["B"]);
}
public void OutgoingTransfersSplitsNewDownloads()
{
PopularityTransfer = 1;
DownloadData.SetDownloadCount("A", "1.0.0", 100);
DownloadData.SetDownloadCount("B", "1.0.0", 5);
DownloadData.SetDownloadCount("C", "1.0.0", 0);
DownloadChanges["A"] = 100;
PopularityTransfers.AddTransfer("A", "B");
PopularityTransfers.AddTransfer("A", "C");
var result = Target.UpdateDownloadTransfers(
DownloadData,
DownloadChanges,
OldTransfers,
PopularityTransfers);
Assert.Equal(new[] { "A", "B", "C" }, result.Keys);
Assert.Equal(0, result["A"]);
Assert.Equal(55, result["B"]);
Assert.Equal(50, result["C"]);
}