added test for init=() and init=nothing (#144)

test/suite/initial_guess.jl

@@ -1,4 +1,4 @@
-println("Test: initial guess options\n")
+println("Test: initial guess options")
 
 # use 0 iterations to check initial guess, >0 to check cv
 maxiter = 0
@@ -48,10 +48,18 @@ u_vec = [0, 0.3, .1]
 # 1 Pass initial guess to all-in-one solve call
 
 # 1.a default initial guess
-@testset verbose = true showtiming = true ":default_init" begin
+@testset verbose = true showtiming = true ":default_init_no_arg" begin
     sol = solve(ocp, print_level=0, max_iter=maxiter)
     @test(check_xf(sol, [0.1, 0.1]) && check_uf(sol, 0.1) && check_v(sol, 0.1))
 end
+@testset verbose = true showtiming = true ":default_init_()" begin
+    sol = solve(ocp, print_level=0, init=(), max_iter=maxiter)
+    @test(check_xf(sol, [0.1, 0.1]) && check_uf(sol, 0.1) && check_v(sol, 0.1))
+end
+@testset verbose = true showtiming = true ":default_init_nothing" begin
+    sol = solve(ocp, print_level=0, init=nothing,max_iter=maxiter)
+    @test(check_xf(sol, [0.1, 0.1]) && check_uf(sol, 0.1) && check_v(sol, 0.1))
+end
 
 # 1.b constant initial guess
 @testset verbose = true showtiming = true ":constant_x" begin

test/test_initial_guess.jl

@@ -59,6 +59,18 @@ if maxiter > 0
 else
     println(check_xf(sol, [0.1, 0.1]) && check_uf(sol, 0.1) && check_v(sol, 0.1))
 end
+sol = solve(ocp, print_level=0, init=(), max_iter=maxiter)
+if maxiter > 0
+    @printf("%-56s %.3f at %d iterations\n", "Default initial guess", sol.objective, sol.iterations)
+else
+    println(check_xf(sol, [0.1, 0.1]) && check_uf(sol, 0.1) && check_v(sol, 0.1))
+end
+sol = solve(ocp, print_level=0, init=nothing, max_iter=maxiter)
+if maxiter > 0
+    @printf("%-56s %.3f at %d iterations\n", "Default initial guess", sol.objective, sol.iterations)
+else
+    println(check_xf(sol, [0.1, 0.1]) && check_uf(sol, 0.1) && check_v(sol, 0.1))
+end
 
 # 1.b constant initial guess
 sol = solve(ocp, print_level=0, init=(state=x_const,), max_iter=maxiter)
@@ -110,7 +122,7 @@ else
     println(check_xf(sol, x_const) && check_uf(sol, u_const) && check_v(sol, v_const))
 end    
 
-# 1. functional initial guess
+# 1.c functional initial guess
 sol = solve(ocp, print_level=0, init=(state=x_func,), max_iter=maxiter)
 if maxiter > 0
     @printf("%-56s %.3f at %d iterations\n", "Functional x; default u,v", sol.objective, sol.iterations)