adding interpol test

Author: jlbaranda

julia/MOLE.jl/test/runtests.jl

@@ -14,6 +14,10 @@ import MOLE: Operators, BCs
     @testset "Testing 1D laplacian" begin
         include("Operators/laplacian.jl")
     end
+
+    @testset "Testing interpol" begin
+        include("Operators/interpol.jl")
+    end
 end
 
 @testset "Testing Boundary Conditions" begin