Creating SwiftPieChart: testing slice

PieSliceView.swift

struct PieSliceView_Previews: PreviewProvider {
    static var previews: some View {
        PieSliceView(pieSliceData: PieSliceData(
                      startAngle: Angle(degrees: 0.0),
                      endAngle: Angle(degrees: 220.0),
                      color: Color.black))
    }
}