Add allocation tests

Author: jishnub

src/adjtrans.jl

@@ -555,9 +555,16 @@ end
 
 # Special adjoint/transpose methods for Adjoint/Transpose that have been reshaped as a vector
 # these are used in transposing banded matrices by forwarding the operation to the bands
-# compute vec(transpose(A)), but avoid an allocating reshape if possible
+"""
+    _vectranspose(A::AbstractVector)::AbstractVector
+
+Compute `vec(transpose(A))`, but avoid an allocating reshape if possible
+"""
 _vectranspose(A::AbstractVector) = vec(transpose(A))
 _vectranspose(A::Base.ReshapedArray{<:Any,1,<:TransposeAbsVec}) = transpose(parent(A))
-# compute vec(adjoint(A)), but avoid an allocating reshape if possible
+"""
+    _vecadjoint(A::AbstractVector)::AbstractVector
+Compute `vec(adjoint(A))`, but avoid an allocating reshape if possible
+"""
 _vecadjoint(A::AbstractVector) = vec(adjoint(A))
 _vecadjoint(A::Base.ReshapedArray{<:Any,1,<:AdjointAbsVec}) = adjoint(parent(A))

test/bidiag.jl

@@ -1250,6 +1250,8 @@ end
         @test B[1,1] == m
         C[2,1] = el
         @test B[1,2] == m
+        @test (@allocated op(B)) == 0
+        @test (@allocated op(op(B))) == 0
     end
 end
 

test/diagonal.jl

@@ -1523,6 +1523,8 @@ end
         el = op(m)
         C[1,1] = el
         @test D[1,1] == m
+        @test (@allocated op(D)) == 0
+        @test (@allocated op(op(D))) == 0
     end
 end