Fix Laurent Conversion (#91)

Author: jishnub

Project.toml

@@ -1,6 +1,6 @@
 name = "ApproxFunFourier"
 uuid = "59844689-9c9d-51bf-9583-5b794ec66d30"
-version = "0.3.20"
+version = "0.3.21"
 
 [deps]
 AbstractFFTs = "621f4979-c628-5d54-868e-fcf4e3e8185c"

src/ApproxFunFourier.jl

@@ -36,7 +36,7 @@ import ApproxFunBase: Fun, SumSpace, SubSpace, NoSpace, IntervalOrSegment,
             hesseneigvals, chebyshev_clenshaw, roots, EmptyDomain,
             chebmult_getindex, components, affine_setdiff, complexroots,
             assert_integer, companion_matrix, InterlaceOperator_Diagonal,
-            evaluation_point, SpecialEvalPtType
+            evaluation_point, SpecialEvalPtType, PermutationOperator
 
 import BandedMatrices: bandwidths
 

test/runtests.jl

@@ -328,6 +328,11 @@ end
             @test Evaluation(sp, pt, 2) * f ≈ f''(pt)
         end
     end
+
+    f = Fun(cos, Laurent(0..2pi))
+    g = Conversion(Laurent(0..2pi), Laurent(2pi..0)) * f
+    @test space(g) == Laurent(2pi..0)
+    @test g(pi/3) ≈ f(pi/3)
 end
 
 @testset "Circle" begin