convert to vector in chop (#168)

* convert to vector in chop

* add chebyshev test

Author: jishnub

src/Fun.jl

@@ -282,8 +282,7 @@ function chop!(f::Fun,tol...)
     f
 end
 
-chop(f::Fun,tol) = chop!(Fun(f.space,copy(f.coefficients)),tol)
-chop(f::Fun) = chop!(Fun(f.space,copy(f.coefficients)))
+chop(f::Fun,tol...) = chop!(Fun(f.space,convert(Vector, f.coefficients)),tol...)
 
 copy(f::Fun) = Fun(space(f),copy(f.coefficients))
 

test/SpacesTest.jl

@@ -1,6 +1,7 @@
 using ApproxFunBase, Test
 import ApproxFunBase: PointSpace, HeavisideSpace, PiecewiseSegment, dimension, Vec, checkpoints
 using ApproxFunOrthogonalPolynomials
+using StaticArrays
 
 @testset "Spaces" begin
     @testset "PointSpace" begin
@@ -111,6 +112,11 @@ using ApproxFunOrthogonalPolynomials
             g = @inferred (x -> x^2)(f)
             @test eltype(coefficients(g)) == Float32
         end
+
+        @testset "static coeffs" begin
+            f = Fun(PointSpace(1:3), SA[1,2,3])
+            @test coefficients(f^2) == coefficients(f).^2
+        end
     end
 
     @testset "Derivative operator for HeavisideSpace" begin
@@ -297,5 +303,11 @@ using ApproxFunOrthogonalPolynomials
                 @test f + f ≈ 2f ≈ f*2
             end
         end
+
+        @testset "static coeffs" begin
+            f = Fun(Chebyshev(), SA[1,2,3])
+            g = Fun(Chebyshev(), [1,2,3])
+            @test coefficients(f^2) == coefficients(g^2)
+        end
     end
 end