Add tests for solvers

test/autodiff.jl

@@ -0,0 +1,13 @@
+using SciMLNLSolve, SciMLBase
+# Test the autodiff technique
+function f!(fvec, x, p)
+    fvec[1] = (x[1]+3)*(x[2]^3-7)+18
+    fvec[2] = sin(x[2]*exp(x[1])-1)
+end
+
+prob = NonlinearProblem{true}(f!,[ 0.1; 1.2])
+sol = solve(prob,NLSolveJL(autodiff=:forward))
+
+du = zeros(2)
+f!(du, sol.u, nothing)
+@test maximum(du) < 1e-6

test/finite_difference.jl

@@ -0,0 +1,13 @@
+using SciMLNLSolve, SciMLBase
+# Test the finite differencing technique
+function f!(fvec, x, p)
+    fvec[1] = (x[1]+3)*(x[2]^3-7)+18
+    fvec[2] = sin(x[2]*exp(x[1])-1)
+end
+
+prob = NonlinearProblem{true}(f!,[ 0.1; 1.2])
+sol = solve(prob,NLSolveJL(autodiff=:central))
+
+du = zeros(2)
+f!(du, sol.u, nothing)
+@test maximum(du) < 1e-6

test/nlsolve.jl

@@ -0,0 +1,68 @@
+using SciMLNLSolve, SciMLBase
+
+# IIP Tests
+function f_iip(du, u, p, t)
+    du[1] = 2 - 2u[1]
+    du[2] = u[1] - 4u[2]
+end
+u0 = zeros(2)
+prob_iip = SteadyStateProblem(f_iip, u0)
+abstol = 1e-8
+
+for alg in [NLSolveJL()]
+    sol = solve(prob_iip, alg)
+    @test sol.retcode == :Success
+    p = nothing
+
+    du = zeros(2)
+    f_iip(du, sol.u, nothing, 0)
+    @test maximum(du) < 1e-6
+end
+
+# OOP Tests
+f_oop(u, p, t) = [2 - 2u[1],u[1] - 4u[2]]
+u0 = zeros(2)
+prob_oop = SteadyStateProblem(f_oop, u0)
+
+for alg in [NLSolveJL()]
+    sol = solve(prob_oop, alg)
+    @test sol.retcode == :Success
+
+    du = zeros(2)
+    du = f_oop(sol.u, nothing, 0)
+    @test maximum(du) < 1e-6
+end
+
+# NonlinearProblem Tests
+
+function f_iip(du, u, p)
+    du[1] = 2 - 2u[1]
+    du[2] = u[1] - 4u[2]
+end
+u0 = zeros(2)
+prob_iip = NonlinearProblem{true}(f_iip, u0)
+abstol = 1e-8
+for alg in [NLSolveJL()]
+    local sol
+    sol = solve(prob_iip, alg)
+    @test sol.retcode == :Success
+    p = nothing
+
+    du = zeros(2)
+    f_iip(du, sol.u, nothing)
+    @test maximum(du) < 1e-6
+end
+
+# OOP Tests
+f_oop(u, p) = [2 - 2u[1],u[1] - 4u[2]]
+u0 = zeros(2)
+prob_oop = NonlinearProblem{false}(f_oop, u0)
+for alg in [NLSolveJL(),]
+    local sol
+    sol = solve(prob_oop, alg)
+    @test sol.retcode == :Success
+
+    du = zeros(2)
+    du = f_oop(sol.u, nothing)
+    @test maximum(du) < 1e-6
+end

test/runtests.jl

@@ -1,7 +1,6 @@
 using Pkg
 using SafeTestsets
 using Test
-using SciMLBase
 
 #@test isempty(detect_ambiguities(SciMLBase))
 
@@ -10,4 +9,6 @@ const is_APPVEYOR = ( Sys.iswindows() && haskey(ENV,"APPVEYOR") )
 
 @time begin
 @time @safetestset "NLsolve.jl" begin include("nlsolve.jl") end
+@time @safetestset "NLsolve.jl" begin include("autodiff.jl") end
+@time @safetestset "NLsolve.jl" begin include("finite_difference.jl") end
 end