public static void GraphicsDrawIconDoesNotLeakHandles()
{
RemoteExecutor.Invoke(() =>
{
const int handleTreshold = 1;
using Bitmap bmp = new(100, 100);
using Icon ico = new(Helpers.GetTestBitmapPath("16x16_one_entry_4bit.ico"));
IntPtr hdc = Helpers.GetDC(Helpers.GetForegroundWindow());
using Graphics graphicsFromHdc = Graphics.FromHdc(hdc);
using Process currentProcess = Process.GetCurrentProcess();
IntPtr processHandle = currentProcess.Handle;
int initialHandles = Helpers.GetGuiResources(processHandle, 0);
ValidateNoWin32Error(initialHandles);
for (int i = 0; i < 5000; i++)
{
graphicsFromHdc.DrawIcon(ico, 100, 100);
}
int finalHandles = Helpers.GetGuiResources(processHandle, 0);
ValidateNoWin32Error(finalHandles);
Assert.InRange(finalHandles, initialHandles - handleTreshold, initialHandles + handleTreshold);
}).Dispose();
}
public static IEnumerable <object[]> FromHdc_TestData()
{
yield return(new object[] { Helpers.GetDC(IntPtr.Zero) });
yield return(new object[] { Helpers.GetWindowDC(IntPtr.Zero) });
IntPtr foregroundWindow = Helpers.GetForegroundWindow();
yield return(new object[] { Helpers.GetDC(foregroundWindow) });
}
