add remake tests for SCCNonlinearProblem

Author: SebastianM-C

test/remake_tests.jl

@@ -275,6 +275,51 @@ for prob in deepcopy(probs)
     end
 end
 
+u0 = zeros(2)
+p = zeros(3)
+
+function f1(du, u, p)
+    du[1] = cos(u[2]) - u[1]
+    du[2] = sin(u[1] + u[2]) + u[2]
+end
+explicitfun1(p, sols) = nothing
+prob1 = NonlinearProblem(
+    NonlinearFunction{true, SciMLBase.NoSpecialize}(f1), zeros(2), p)
+
+function f2(du, u, p)
+    du[1] = 2u[2] + u[1] + 1.0
+    du[2] = u[3]^2 + u[2]
+    du[3] = u[1]^2 + u[3]
+end
+explicitfun2(p, sols) = nothing
+prob2 = NonlinearProblem(
+    NonlinearFunction{true, SciMLBase.NoSpecialize}(f2), zeros(3), p)
+
+function f3(du, u, p)
+    du[1] = p[1] + 2.0u[1] + 2.5u[2] + 1.5u[3]
+    du[2] = p[2] + 4.0u[1] - 1.5u[2] + 1.5u[3]
+    du[3] = p[3] + +u[1] - u[2] - u[3]
+end
+prob3 = NonlinearProblem(
+    NonlinearFunction{true, SciMLBase.NoSpecialize}(f3), zeros(3), p)
+function explicitfun3(p, sols)
+    p[1] = sols[1][1] + sols[1][2] + sols[2][1] + sols[2][2] + sols[2][3]
+    p[2] = sols[1][1] + sols[1][2] + sols[2][1] + 2.0sols[2][2] + sols[2][3]
+    p[3] = sols[1][1] + 2.0sols[1][2] + 3.0sols[2][1] + 5.0sols[2][2] +
+           6.0sols[2][3]
+end
+
+sccprob = SciMLBase.SCCNonlinearProblem([prob1, prob2, prob3],
+    SciMLBase.Void{Any}.([explicitfun1, explicitfun2, explicitfun3]))
+
+new_sccprob = @inferred remake(sccprob)
+
+@test new_sccprob.probs !== missing
+@test new_sccprob.explicitfuns! !== missing
+
+new_sccprob = remake(sccprob, p=[1,2,3], parameters_alias=true)
+@test new_sccprob.p == [1, 2, 3]
+
 # eltype(()) <: Pair, so ensure that this doesn't error
 function lorenz!(du, u, _, t)
     du[1] = 1 * (u[2] - u[1])