format and add tests

docs/src/solvers/FixedPointSolvers.md

@@ -50,4 +50,4 @@ robust.
 
 ### SIAMFANLEquations.jl
 
-  - `SIAMFANLEquationsJL(; method = :anderson)`: Anderson acceleration for fixed point problems.
+  - `SIAMFANLEquationsJL(; method = :anderson)`: Anderson acceleration for fixed point problems.

ext/NonlinearSolveSIAMFANLEquationsExt.jl

@@ -43,7 +43,8 @@ function SciMLBase.__solve(prob::NonlinearProblem, alg::SIAMFANLEquationsJL, arg
     rtol = NonlinearSolve.DEFAULT_TOLERANCE(reltol, T)
 
     if prob.u0 isa Number
-        f = method == :anderson ? (du, u) -> (du = prob.f(u, prob.p)) : ((u) -> prob.f(u, prob.p))
+        f = method == :anderson ? (du, u) -> (du = prob.f(u, prob.p)) :
+            ((u) -> prob.f(u, prob.p))
 
         if method == :newton
             sol = nsolsc(f, prob.u0; maxit = maxiters, atol, rtol, printerr = ShT)
@@ -55,7 +56,7 @@ function SciMLBase.__solve(prob::NonlinearProblem, alg::SIAMFANLEquationsJL, arg
         elseif method == :anderson
             f, u = NonlinearSolve.__construct_f(prob; alias_u0,
                 make_fixed_point = Val(true), can_handle_arbitrary_dims = Val(true))
-            sol = aasol(f, [prob.u0], m, __zeros_like(u, 1, 2*m+4); maxit = maxiters,
+            sol = aasol(f, [prob.u0], m, __zeros_like(u, 1, 2 * m + 4); maxit = maxiters,
                 atol, rtol, beta = beta)
         end
 
@@ -110,7 +111,7 @@ function SciMLBase.__solve(prob::NonlinearProblem, alg::SIAMFANLEquationsJL, arg
         elseif method == :anderson
             f!, u = NonlinearSolve.__construct_f(prob; alias_u0,
                 can_handle_arbitrary_dims = Val(true), make_fixed_point = Val(true))
-            sol = aasol(f!, u, m, zeros(T, N, 2*m+4), atol = atol, rtol = rtol,
+            sol = aasol(f!, u, m, zeros(T, N, 2 * m + 4), atol = atol, rtol = rtol,
                 maxit = maxiters, beta = beta)
         end
     else

test/misc/no_ad.jl

@@ -0,0 +1,23 @@
+using LinearAlgebra, NonlinearSolve, Test
+
+@testset "[IIP] no AD" begin
+    f_iip = Base.Experimental.@opaque (du, u, p) -> du .= u .* u .- p
+    u0 = [0.0]
+    prob = NonlinearProblem(f_iip, u0, 1.0)
+    for alg in [RobustMultiNewton(autodiff = AutoFiniteDiff()())]
+        sol = solve(prob, alg)
+        @test isapprox(only(sol.u), 1.0)
+        @test SciMLBase.successful_retcode(sol.retcode)
+    end
+end
+
+@testset "[OOP] no AD" begin
+    f_oop = Base.Experimental.@opaque (u, p) -> u .* u .- p
+    u0 = [0.0]
+    prob = NonlinearProblem{false}(f_oop, u0, 1.0)
+    for alg in [RobustMultiNewton(autodiff = AutoFiniteDiff())]
+        sol = solve(prob, alg)
+        @test isapprox(only(sol.u), 1.0)
+        @test SciMLBase.successful_retcode(sol.retcode)
+    end
+end

test/runtests.jl

@@ -35,6 +35,7 @@ end
         @time @safetestset "Matrix Resizing" include("misc/matrix_resizing.jl")
         @time @safetestset "Infeasible Problems" include("misc/infeasible.jl")
         @time @safetestset "Banded Matrices" include("misc/banded_matrices.jl")
+        @time @safetestset "No AD" include("misc/no_ad.jl")
     end
 
     if GROUP == "GPU"

test/wrappers/fixedpoint.jl

@@ -1,4 +1,5 @@
-using NonlinearSolve, FixedPointAcceleration, SpeedMapping, NLsolve, SIAMFANLEquations, LinearAlgebra, Test
+using NonlinearSolve,
+    FixedPointAcceleration, SpeedMapping, NLsolve, SIAMFANLEquations, LinearAlgebra, Test
 
 # Simple Scalar Problem
 @testset "Simple Scalar Problem" begin
@@ -29,7 +30,8 @@ end
     @test maximum(abs.(solve(prob, SpeedMappingJL()).resid)) ≤ 1e-10
     @test maximum(abs.(solve(prob, SpeedMappingJL(; orders = [3, 2])).resid)) ≤ 1e-10
     @test maximum(abs.(solve(prob, SpeedMappingJL(; stabilize = true)).resid)) ≤ 1e-10
-    @test maximum(abs.(solve(prob, SIAMFANLEquationsJL(; method = :anderson)).resid)) ≤ 1e-10
+    @test maximum(abs.(solve(prob, SIAMFANLEquationsJL(; method = :anderson)).resid)) ≤
+          1e-10
 
     @test_broken maximum(abs.(solve(prob, NLsolveJL(; method = :anderson)).resid)) ≤ 1e-10
 end