public void SafeInvoke_NullAction_ThrowsArgumentNullException(ControlExtensions.ErrorHandlingAction errorHandling)
{
_control.CreateControl();
var ex = Assert.Throws <ArgumentNullException>(() => { _control.SafeInvoke(null, "NullActionTest", errorHandling); });
Assert.AreEqual("action", ex.ParamName);
}
public void SafeInvoke_DisposedAfterInvokingOnUiThread_InvokedActionDequeued(ControlExtensions.ErrorHandlingAction errorHandling)
{
string confirmationMessage = null;
_control.CreateControl();
IAsyncResult resultOfSafeInvokeCall1 = null;
IAsyncResult resultOfSafeInvokeCall2 = null;
bool action2WasExecuted = false;
var worker = new BackgroundWorker();
worker.DoWork += (sender, args) =>
{
var ctrl = (Control)args.Argument;
Console.WriteLine("SafeInvoke 1");
resultOfSafeInvokeCall1 = ctrl.SafeInvoke(() =>
{
Console.WriteLine("invoking 1");
confirmationMessage = "First action got invoked";
Assert.IsFalse(ctrl.InvokeRequired);
ctrl.Dispose();
Console.WriteLine("ctrl has been disposed");
}, "Getting initial value, resetting control text, and disposing control.");
Console.WriteLine("SafeInvoke 2");
resultOfSafeInvokeCall2 = ctrl.SafeInvoke(() =>
{
action2WasExecuted = true;
Assert.Fail("This should have been de-queued when the control was disposed.");
}, "DisposedAfterInvokingOnUiThread", errorHandling);
Console.WriteLine("About to sleep on worker thread : 50 ms");
Thread.Sleep(60);
};
worker.RunWorkerAsync(_control);
Thread.Sleep(20);
Console.WriteLine("Ui thread waking up to begin processing queued-up aynchronous actions.");
while (worker.IsBusy)
{
Application.DoEvents();
}
Assert.AreEqual("First action got invoked", confirmationMessage);
Assert.IsNotNull(resultOfSafeInvokeCall1, "First call to SafeInvoke should have returned a non-null IAsyncResult.");
Assert.IsFalse(resultOfSafeInvokeCall1.CompletedSynchronously, "Expected asynchronous invocation of action 1.");
Assert.IsNull(_threadException, "If this is not null, then the second call to SafeInvoke must have thrown an exception.");
Assert.IsNotNull(resultOfSafeInvokeCall2, "Second call to SafeInvoke should have returned a non-null IAsyncResult (even though it is later dequeued).");
Assert.IsNull(_control.EndInvoke(resultOfSafeInvokeCall1)); // this should not throw an exception
Assert.IsFalse(action2WasExecuted, "Action 2 should not have been executed at all.");
if (Platform.IsWindows)
{
VerifyExpectedExceptionInNest <ObjectDisposedException>(() => _control.EndInvoke(resultOfSafeInvokeCall2));
}
}
public void SafeInvoke_OnUiThread_Disposed_Ignore_ReturnsWithoutInvokingOrThrowing(ControlExtensions.ErrorHandlingAction errorHandling)
{
var i = 0;
_control.CreateControl();
_control.Dispose();
Assert.IsNull(_control.SafeInvoke(() => { i++; }, "DisposedTest", errorHandling));
Assert.AreEqual(0, i);
}
public void SafeInvoke_OnUiThread_HandleNotCreated_NotIgnoreAll_ThrowsInvalidOperationException(ControlExtensions.ErrorHandlingAction errorHandling)
{
var ex = Assert.Throws <InvalidOperationException>(() => { _control.SafeInvoke(() => { }, "HandleNotCreatedTest", errorHandling); });
Assert.AreEqual("SafeInvoke called before the control's handle was created. (HandleNotCreatedTest)", ex.Message);
}
public void SafeInvoke_NullControl_ThrowsArgumentNullException(ControlExtensions.ErrorHandlingAction errorHandling)
{
var ex = Assert.Throws <ArgumentNullException>(() => { ControlExtensions.SafeInvoke(null, () => { }, "NullControlTest", errorHandling); });
Assert.AreEqual("control", ex.ParamName);
}
public void SafeInvoke_OnNonUiThread_Disposed_Ignore_ReturnsWithoutInvokingOrThrowing(ControlExtensions.ErrorHandlingAction errorHandling)
{
IAsyncResult resultOfSafeInvokeCall = null;
var i = 0;
_control.CreateControl();
_control.Dispose();
var worker = new BackgroundWorker();
worker.DoWork += (sender, args) =>
{
resultOfSafeInvokeCall = _control.SafeInvoke(() => { i++; }, "DisposedTest", errorHandling);
};
worker.RunWorkerAsync(_control);
while (worker.IsBusy)
{
Application.DoEvents();
}
Assert.AreEqual(0, i);
Assert.IsNull(resultOfSafeInvokeCall);
}