public static void CountOverflow()
{
HandleCollector collector = new HandleCollector("CountOverflow", int.MaxValue);
// We could iterate here 2B times calling Add, but that often takes over 100s
// Instead, for testing purposes, we reach into the HandleCollector via reflection
// to make it think it's already been called int.MaxValue - 10 times. We then
// only have to call Add 10 times rather than int.MaxValue times, and the test
// completes very quickly. If we ever need to run the test on a platform that
// doesn't support such reflection, we can revert to the super-long running test
// or find another workaround.
const int ToAdd = 10; // int.MaxValue
{
// Jump HandleCollector instance forward until it almost overflows
TypeInfo type = typeof(HandleCollector).GetTypeInfo();
FieldInfo handleCount =
type.GetDeclaredField("_handleCount") ?? // corefx
type.GetDeclaredField("handleCount"); // desktop
Assert.NotNull(handleCount);
handleCount.SetValue(collector, int.MaxValue - ToAdd);
}
for (int i = 0; i < ToAdd; i++)
{
collector.Add();
}
Assert.Throws <InvalidOperationException>(() => collector.Add());
}
public static void CountOverflow()
{
HandleCollector collector = new HandleCollector("CountOverflow", int.MaxValue);
for (int i = 0; i < Int32.MaxValue; i++)
{
collector.Add();
}
Assert.Throws<InvalidOperationException>(() => collector.Add());
}
public static void CountOverflow()
{
HandleCollector collector = new HandleCollector("CountOverflow", int.MaxValue);
for (int i = 0; i < Int32.MaxValue; i++)
{
collector.Add();
}
Assert.Throws <InvalidOperationException>(() => collector.Add());
}
public static void CountOverflow()
{
HandleCollector collector = new HandleCollector("CountOverflow", int.MaxValue);
// We could iterate here 2B times calling Add, but that often takes over 100s
// Instead, for testing purposes, we reach into the HandleCollector via reflection
// to make it think it's already been called int.MaxValue - 10 times. We then
// only have to call Add 10 times rather than int.MaxValue times, and the test
// completes very quickly. If we ever need to run the test on a platform that
// doesn't support such reflection, we can revert to the super-long running test
// or find another workaround.
const int ToAdd = 10; // int.MaxValue
{
// Jump HandleCollector instance forward until it almost overflows
FieldInfo handleCount = typeof(HandleCollector).GetTypeInfo().GetDeclaredField("_handleCount");
Assert.NotNull(handleCount);
handleCount.SetValue(collector, int.MaxValue - ToAdd);
}
for (int i = 0; i < ToAdd; i++)
{
collector.Add();
}
Assert.Throws<InvalidOperationException>(() => collector.Add());
}
public void AddRemove_AcrossMultipleGenerations_Success()
{
var collector = new HandleCollector("name", 0);
collector.Add();
Assert.Equal(1, collector.Count);
collector.Add();
Assert.Equal(2, collector.Count);
collector.Add();
Assert.Equal(3, collector.Count);
collector.Remove();
Assert.Equal(2, collector.Count);
collector.Remove();
Assert.Equal(1, collector.Count);
collector.Remove();
Assert.Equal(0, collector.Count);
}
internal HandleLimitTester(HandleCollector collector)
{
_collector = collector;
_collector.Add();
GC.KeepAlive(this);
}
internal HandleLimitTester(HandleCollector collector)
{
_collector = collector;
_collector.Add();
GC.KeepAlive(this);
}