public void DrawLinesCloseAllFigures()
{
var builder = new ShapeBuilder();
builder.AddLine(10, 10, 10, 90);
builder.AddLine(10, 90, 50, 50);
builder.StartFigure();
builder.AddLine(10, 10, 10, 90);
builder.AddLine(10, 90, 50, 50);
var shape = builder.Build();
Assert.Equal(2, shape.Paths.Length);
Assert.IsType <Path>(shape.Paths[0]);
Assert.IsType <Path>(shape.Paths[1]);
builder.CloseAllFigures();
shape = builder.Build();
Assert.Equal(2, shape.Paths.Length);
Assert.IsType <Polygon>(shape.Paths[0].AsShape());
Assert.IsType <Polygon>(shape.Paths[1].AsShape());
}