add test

Author: jClugstor

test/forwarddiff_overloads.jl

@@ -87,13 +87,6 @@ backslash_x_p = A \ new_b
 @test ≈(x_p, backslash_x_p, rtol = 1e-9)
 
 # Nested Duals
-function h(p)
-    (A = [p[1] p[2]+1 p[2]^3;
-          3*p[1] p[1]+5 p[2] * p[1]-4;
-          p[2]^2 9*p[1] p[2]],
-        b = [p[1] + 1, p[2] * 2, p[1]^2])
-end
-
 A,
 b = h([ForwardDiff.Dual(ForwardDiff.Dual(5.0, 1.0, 0.0), 1.0, 0.0),
     ForwardDiff.Dual(ForwardDiff.Dual(5.0, 1.0, 0.0), 0.0, 1.0)])
@@ -193,3 +186,10 @@ overload_x_p = solve(prob, UMFPACKFactorization())
 backslash_x_p = A \ b
 
 @test ≈(overload_x_p, backslash_x_p, rtol = 1e-9)
+
+
+# Test that GenericLU doesn't create a DualLinearCache
+A, b = h([ForwardDiff.Dual(5.0, 1.0, 0.0), ForwardDiff.Dual(5.0, 0.0, 1.0)])
+
+prob = LinearProblem(A, b)
+@test init(prob, GenericLUFactorization()) isa LinearCache