1 

     2 

     2 assert(optimise(load_bff("benchmark.bf")).length == 181)

     3 assert(optimise(load_bff("benchmark.bf")).length == 181)

     3 assert(optimise(load_bff("mandelbrot.bf")).length == 11203)

     4 assert(optimise(load_bff("mandelbrot.bf")).length == 11203)