Make sure == and hash work for TaylorBundles

Author: oxinabox

src/tangent.jl

@@ -94,6 +94,8 @@ end
     coeffs::C
     TaylorTangent(coeffs) = $(Expr(:new, :(TaylorTangent{typeof(coeffs)}), :coeffs))
 end
+Base.:(==)(a::TaylorTangent, b::TaylorTangent) = a.coeffs == b.coeffs
+Base.hash(tt::TaylorTangent, h::UInt64) = hash(tt.coeffs, h)
 
 """
     struct TaylorTangent{C}
@@ -159,6 +161,9 @@ TangentBundle
 TangentBundle{N}(primal::B, tangent::P) where {N, B, P<:AbstractTangentSpace} =
     _TangentBundle(Val{N}(), primal, tangent)
 
+Base.hash(tb::TangentBundle, h::UInt64) = hash(tb.primal, h)
+Base.:(==)(a::TangentBundle, b::TangentBundle) = (a.primal == b.primal) && (a.tangent == b.tangent)    
+
 const ExplicitTangentBundle{N, B, P} = TangentBundle{N, B, ExplicitTangent{P}}
 
 check_tangent_invariant(lp, N) = @assert lp == 2^N - 1

test/tangent.jl

@@ -46,6 +46,11 @@ end
     end
 end
 
+@testset "== and hash" begin
+    @test TaylorBundle{1}([2.0, 4.0], ([20.0, 200.0],)) == TaylorBundle{1}([2.0, 4.0], ([20.0, 200.0],))
+    @test hash(TaylorBundle{1}(0.0, (0.0,))) == hash(0)
+end
+
 @testset "truncate" begin
     tt = TaylorTangent((1.0,2.0,3.0,4.0,5.0,6.0,7.0))
     @test truncate(tt, Val(2)) == TaylorTangent((1.0,2.0))