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#!/usr/bin/env julia
using Dates
using Test: @test, @testset
function banking_day_offset(
start_date::Date,
offset::T,
bank_holidays::Vector{Date} = Date[],
)::Date where {T<:Integer}
if (start_date in bank_holidays) || (Dates.dayofweek(start_date) in (6, 7))
return banking_day_offset(start_date + Day(1), offset, bank_holidays)
end
if offset == 0
return start_date
end
return banking_day_offset(start_date + Day(1), offset - 1, bank_holidays)
end
@testset "Banking day offset" begin
@test banking_day_offset(
Date("2018-06-28", dateformat"y-m-d"),
3,
[Date("2018-07-03", dateformat"y-m-d")],
) == Date("2018-07-04", dateformat"y-m-d")
@test banking_day_offset(Date("2018-06-28", dateformat"y-m-d"), 3) ==
Date("2018-07-03", dateformat"y-m-d")
end
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