@testset "NLP Solver" begin

  using PlotlyJS: savefig

  println("Testing NLP solver")

  # This will be the only test to verify rather than testing different complexities
  n = 50
  flybys = [Earth, Venus, Mars]#, Jupiter]
  launch_window = DateTime(2021,10,1), DateTime(2021,12,1)
  latest_arrival = DateTime(2028,1,1)
  dates = [DateTime(2021,11,1),
           DateTime(2022,3,27),
           DateTime(2022,8,28)]
           # DateTime(2028,3,1)]
  phases = Vector{Phase}()
  launch_v∞, _, tof1 = Thesis.lamberts(flybys[1], flybys[2], dates[1], dates[2])
  for i in 1:length(dates)-2
    v∞_in1, tof1 = Thesis.lamberts(flybys[i], flybys[i+1], dates[i], dates[i+1])[2:3]
    v∞_out2 = Thesis.lamberts(flybys[i+1], flybys[i+2], dates[i+1], dates[i+2])[1]
    push!(phases, Phase(flybys[i+1], v∞_in1, v∞_out2, tof1, 0.01*ones(50,3)))
  end
  v∞_in, tof = Thesis.lamberts(flybys[end-1], flybys[end], dates[end-1], dates[end])[2:3]
  push!(phases, Phase(flybys[end], v∞_in, v∞_in, tof, 0.01*ones(50,3)))
  guess = Mission_Guess(bepi, 3_600., dates[1], launch_v∞, phases)
  m = solve_mission(guess,
                    launch_window,
                    latest_arrival,
                    200.,
                    20.,
                    verbose=true,
                    print_level=4)
  @test typeof(m) == Mission
  if typeof(m) == Mission
    p = plot(m, title="NLP Test Solution (2 Phases)")
    savefig(p,"../plots/nlp_test_2_phase.html")
    store(m, "missions/nlp_2_phase")
  end

end