public void TextBox_OnHandleDestroyed_InvokeWithHandle_CallsHandleDestroyed(bool modified, EventArgs eventArgs)
{
using var control = new SubTextBox
{
Text = "Text",
SelectionStart = 1,
SelectionLength = 2,
Modified = modified
};
Assert.NotEqual(IntPtr.Zero, control.Handle);
int invalidatedCallCount = 0;
control.Invalidated += (sender, e) => invalidatedCallCount++;
int styleChangedCallCount = 0;
control.StyleChanged += (sender, e) => styleChangedCallCount++;
int createdCallCount = 0;
control.HandleCreated += (sender, e) => createdCallCount++;
int callCount = 0;
EventHandler handler = (sender, e) =>
{
Assert.Same(control, sender);
Assert.Same(eventArgs, e);
callCount++;
};
// Call with handler.
control.HandleDestroyed += handler;
control.OnHandleDestroyed(eventArgs);
Assert.Equal(1, callCount);
Assert.Equal(s_preferredHeight, control.Height);
Assert.Equal(0, control.SelectionStart);
Assert.Equal(0, control.SelectionLength);
Assert.Equal(modified, control.Modified);
Assert.True(control.IsHandleCreated);
Assert.Equal(0, invalidatedCallCount);
Assert.Equal(0, styleChangedCallCount);
Assert.Equal(0, createdCallCount);
// Remove handler.
control.HandleDestroyed -= handler;
control.OnHandleDestroyed(eventArgs);
Assert.Equal(1, callCount);
Assert.Equal(s_preferredHeight, control.Height);
Assert.Equal(0, control.SelectionStart);
Assert.Equal(0, control.SelectionLength);
Assert.Equal(modified, control.Modified);
Assert.True(control.IsHandleCreated);
Assert.Equal(0, invalidatedCallCount);
Assert.Equal(0, styleChangedCallCount);
Assert.Equal(0, createdCallCount);
}
public void TextBox_OnHandleDestroyed_Invoke_CallsHandleDestroyed(EventArgs eventArgs)
{
using var control = new SubTextBox();
int callCount = 0;
EventHandler handler = (sender, e) =>
{
Assert.Same(control, sender);
Assert.Same(eventArgs, e);
callCount++;
};
// Call with handler.
control.HandleDestroyed += handler;
control.OnHandleDestroyed(eventArgs);
Assert.Equal(1, callCount);
Assert.False(control.IsHandleCreated);
// Remove handler.
control.HandleDestroyed -= handler;
control.OnHandleDestroyed(eventArgs);
Assert.Equal(1, callCount);
Assert.False(control.IsHandleCreated);
}