From d022e6094dbec88025fe58dae65df86b668916c1 Mon Sep 17 00:00:00 2001
From: Sheehan Olver <solver@mac.com>
Date: Sun, 22 Oct 2023 19:09:33 +0100
Subject: [PATCH] tests pass

---
 src/chebyshevtransform.jl | 6 +++++-
 test/chebyshevtests.jl    | 4 ++--
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/src/chebyshevtransform.jl b/src/chebyshevtransform.jl
index 1d237aa9..28d77eb7 100644
--- a/src/chebyshevtransform.jl
+++ b/src/chebyshevtransform.jl
@@ -651,10 +651,14 @@ function mul!(y::AbstractArray{T}, P::IChebyshevUTransformPlan{T,1,K,false}, x::
     isempty(x) && return y
     _plan_mul!(y, P.plan, x)
     _ichebu1_postscale!(P.plan.region, y)
+    for d in P.plan.region
+        size(y,d) == 1 && lmul!(2, y) # fix doubling
+    end
+    y
 end
 
 function _ichebu2_rescale!(d::Number, x::AbstractArray{T}) where T
-    _chebu2_prescale!(d, x)
+    _chebu2_postscale!(d, x)
     ldiv!(2, x)
     x
 end
diff --git a/test/chebyshevtests.jl b/test/chebyshevtests.jl
index 48ecc115..82b8da5c 100644
--- a/test/chebyshevtests.jl
+++ b/test/chebyshevtests.jl
@@ -222,7 +222,7 @@ using FastTransforms, Test
 
             f̃ = x -> [sin((k+1)*acos(x))/sin(acos(x)) for k=0:n-3]' * g
             @test f̃(0.1) ≈ exp(T(0.1))
-            @test @inferred(ichebyshevutransform(g, Val(2))) ≈ exp.(p_2)
+            @test @inferred(ichebyshevutransform(g, Val(2))) ≈ f ≈ exp.(p_2)
 
             fcopy = copy(f)
             gcopy = copy(g)
@@ -418,7 +418,7 @@ using FastTransforms, Test
             plan_chebyshevutransform(X,Val(1),2), plan_chebyshevutransform(X, Val(2),2),
             plan_ichebyshevutransform(X,Val(1),1), plan_ichebyshevutransform(X, Val(2),1),
             plan_ichebyshevutransform(X,Val(1),2), plan_ichebyshevutransform(X, Val(2),2))
-            @test_broken F \ (F*X) ≈ F * (F\X) ≈ X
+            @test F \ (F*X) ≈ F * (F\X) ≈ X
         end
     end
 end