Add back missing randomMPS constructors

src/lib/ITensorMPS/src/deprecated.jl

@@ -24,6 +24,18 @@
 # mps/mps.jl
 @deprecate randomMPS(args...; kwargs...) random_mps(args...; kwargs...)
 
+# Deprecated syntax for specifying link dimensions.
+@deprecate randomMPS(elt::Type{<:Number}, sites::Vector{<:Index}, state, linkdims::Integer) random_mps(
+  elt, sites, state; linkdims
+)
+@deprecate randomMPS(elt::Type{<:Number}, sites::Vector{<:Index}, linkdims::Integer) random_mps(
+  elt, sites; linkdims
+)
+@deprecate randomMPS(sites::Vector{<:Index}, state, linkdims::Integer) random_mps(
+  sites, state; linkdims
+)
+@deprecate randomMPS(sites::Vector{<:Index}, linkdims::Integer) random_mps(sites; linkdims)
+
 # Pass throughs of old name to new name:
 
 unique_siteind(A::AbstractMPS, B::AbstractMPS, j::Integer) = siteinds(uniqueind, A, B, j)

src/lib/ITensorMPS/test/base/test_deprecated.jl

@@ -0,0 +1,27 @@
+@eval module $(gensym())
+using ITensors.ITensorMPS: MPS, maxlinkdim, randomMPS, siteinds
+using LinearAlgebra: norm
+using Test: @test, @testset
+@testset "randomMPS" begin
+  sites = siteinds("S=1/2", 4)
+  state = j -> isodd(j) ? "↑" : "↓"
+  linkdims = 2
+  # Deprecated linkdims syntax
+  for mps in [
+    randomMPS(Float64, sites, state; linkdims),
+    randomMPS(Float64, sites; linkdims),
+    randomMPS(sites, state; linkdims),
+    randomMPS(sites, linkdims),
+    # Deprecated linkdims syntax
+    randomMPS(Float64, sites, state, linkdims),
+    randomMPS(Float64, sites, linkdims),
+    randomMPS(sites, state, linkdims),
+    randomMPS(sites, linkdims),
+  ]
+    @test mps isa MPS
+    @test length(mps) == 4
+    @test maxlinkdim(mps) == 2
+    @test norm(mps) > 0
+  end
+end
+end