test mul for composite maps over non-traditional axes

Author: krcools

test/nontradaxes.jl

@@ -70,4 +70,17 @@ using Test, LinearMaps, LinearAlgebra, BlockArrays
     B2u = B2*u; L2u = L2*u
     @test axes(B2u)[1] == axes(L2u)[1] == axes(B2)[1] == axes(L2)[1]
     @test blocklengths(axes(B2u)[1]) == blocklengths(axes(L2u)[1]) == [2,2]
+
+    D1 = rand(4,5)
+    D2 = rand(5,3)
+    D3 = rand(3,6)
+    A1 = PseudoBlockMatrix(D1, [1,3], [2,3])
+    A2 = PseudoBlockMatrix(D2, [2,3], [2,1])
+    A3 = PseudoBlockMatrix(D3, [2,1], [3,2,1])
+    u = rand(6)
+    x = PseudoBlockVector(u, [3,2,1])
+    L = LinearMap(A1) * LinearMap(A2) * LinearMap(A3)
+    y = L * x
+    v = Vector(y)
+    @test v ≈ D1*(D2*(D3*u))
 end