Add test for kron product of Fourier spaces (#117)

* Add test for kron product of Fourier spaces

* Bump Project.toml

---------

Co-authored-by: Michele Zaffalon <[email protected]>

Author: mzaffalon

Project.toml

@@ -1,6 +1,6 @@
 name = "ApproxFunFourier"
 uuid = "59844689-9c9d-51bf-9583-5b794ec66d30"
-version = "0.3.25"
+version = "0.3.26"
 
 [deps]
 AbstractFFTs = "621f4979-c628-5d54-868e-fcf4e3e8185c"

test/runtests.jl

@@ -572,6 +572,14 @@ end
     @test L[1,1] == 0
 end
 
+@testset "tensor product of Fourier spaces, issue ApproxFun.jl#929" begin
+    f = Fun(Fourier(), [0; 0; 1])
+    g = Fun(Fourier(), [0; 0; 0; 0; 0; 1])
+    h = f ⊗ g
+    @test h(π/3, π/2) ≈ f(π/3) * g(π/2)
+    @test h(π/4, π/5) ≈ f(π/4) * g(π/5)
+end
+
 @testset "Piecewise + Constant" begin
     Γ=Circle() ∪ Circle(0.0,0.4)
     o=ones(Γ)