public void RadioAndTv_ShouldStartWithKorW()
{
// Arrange
var elementPredicate = new[] { 'K', 'W' };
// Act
var radio = _sut.Radio();
var tv = _sut.Tv();
// Assert
Assert.IsNotNullOrEmpty(radio);
Assert.IsNotNullOrEmpty(tv);
radio[0].ShouldBeOneOf(elementPredicate);
tv[0].ShouldBeOneOf(elementPredicate);
}