throw ArgumentError instead of ErrorException

Author: carstenbauer

src/definitions.jl

@@ -405,7 +405,7 @@ struct Frequencies{T<:Number} <: AbstractVector{T}
     multiplier::T
 
     Frequencies(n_nonnegative::Int, n::Int, multiplier::T) where {T<:Number} = begin
-        1 ≤ n_nonnegative ≤ n || error("Condition 1 ≤ n_nonnegative ≤ n isn't satisfied.")
+        1 ≤ n_nonnegative ≤ n || throw(ArgumentError("Condition 1 ≤ n_nonnegative ≤ n isn't satisfied."))
         return new{T}(n_nonnegative, n, multiplier)
     end
 end

test/runtests.jl

@@ -96,6 +96,8 @@ end
     @test fftfreq(5, 2) == [0.0, 0.4, 0.8, -0.8, -0.4]
     # <:Number type compatibility
     @test eltype(fftfreq(5, ComplexF64(2))) == ComplexF64
+
+    @test_throws ArgumentError Frequencies(12, 10, 1)
 end
 
 @testset "normalization" begin