public void IsFocusableTest()
{
// Arrange
var ctrl = new TextBox { Visibility = Visibility.Visible, IsEnabled = true, IsTabStop = true, IsHitTestVisible = true };
// Act
var actual = ctrl.IsFocusable();
// Assert
Assert.AreEqual(true, actual);
// Arrange
ctrl = new TextBox { Visibility = Visibility.Collapsed, IsEnabled = true, IsTabStop = true, IsHitTestVisible = true };
// Act
actual = ctrl.IsFocusable();
// Assert
Assert.AreEqual(false, actual);
// Arrange
ctrl = new TextBox { Visibility = Visibility.Visible, IsEnabled = false, IsTabStop = true, IsHitTestVisible = true };
// Act
actual = ctrl.IsFocusable();
// Assert
Assert.AreEqual(false, actual);
// Arrange
ctrl = new TextBox { Visibility = Visibility.Visible, IsEnabled = true, IsTabStop = false, IsHitTestVisible = true };
// Act
actual = ctrl.IsFocusable();
// Assert
Assert.AreEqual(false, actual);
// Arrange
ctrl = new TextBox { Visibility = Visibility.Visible, IsEnabled = true, IsTabStop = true, IsHitTestVisible = false };
// Act
actual = ctrl.IsFocusable();
// Assert
Assert.AreEqual(false, actual);
// Arrange
ctrl = new TextBox { Visibility = Visibility.Visible, IsEnabled = true, IsTabStop = true, IsHitTestVisible = true };
var parent = new ContentControl { Content = ctrl, Visibility = Visibility.Collapsed };
// Act
actual = ctrl.IsFocusable();
// Assert
Assert.AreEqual(false, actual);
}