Add tests for Neuman/Dirichlet w. Complex numbers

Author: AndiMD

test/robin.jl

@@ -198,4 +198,19 @@ for j in 1:2
     end
 end
 
+# Test Neumann and Dirichlet as special cases of RobinBC
+dx = [0.121, 0.783, 0.317, 0.518, 0.178]
+αC = (0.539 + 0.653im, 0.842 + 0.47im)
+αR = (0.045, 0.577)
+@test NeumannBC(αC, dx).b_l ≈ -0.065219 - 0.079013im
+@test DirichletBC(αR...).b_r ≈ 0.577
+@test DirichletBC(Float64, αC...) ≈ 0.123 # broken
+
+@test Dirichlet0BC(Float64).a_r ≈ [-0.0,0.0]
+@test Neumann0BC(dx).a_r ≈ [0.3436293436293436]
+@test Neumann0BC(ComplexF64,dx).a_l ≈ [0.15453384418901658 + 0.0im]
+
+@test NeumannBC(αC, first(dx)).b_r ≈ 0.101882 + 0.05687im
+@test Neumann0BC(first(dx)).a_r ≈ [1.0 - 0.0im]
+@test Neumann0BC(ComplexF64,first(dx)).a_l ≈ [1.0 + 0.0im]