Add one(Dimensions)

Author: MilesCranmer

src/utils.jl

@@ -47,6 +47,7 @@ Base.iterate(q::Quantity) = (q, nothing)
 Base.iterate(::Quantity, ::Nothing) = nothing
 Base.zero(::Type{Quantity{T}}) where {T} = Quantity(zero(T))
 Base.one(::Type{Quantity{T}}) where {T} = Quantity(one(T))
+Base.one(::Type{Dimensions}) = Dimensions()
 
 Base.show(io::IO, d::Dimensions) =
     let tmp_io = IOBuffer()

test/unittests.jl

@@ -97,6 +97,8 @@ using Test
     @test one(Quantity{String}) == Quantity("")
     @test zero(Quantity{Float64}) == Quantity(0.0)
     @test zero(Quantity{Int}) == Quantity(0, length=0, mass=0)
+    @test Quantity(1.0, one(Dimensions)) == Quantity(1.0)
+    @test one(Dimensions) == Dimensions()
 end
 
 @testset "Fallbacks" begin