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