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2 changes: 1 addition & 1 deletion lib/girocode/code.rb
Original file line number Diff line number Diff line change
Expand Up @@ -59,7 +59,7 @@ def amount=(value)

def purpose=(value)
unless value.nil?
raise ArgumentError, "invalid purpose #{value.inspect}" unless value.match?(/\A[A-z0-9]{0,4}\z/)
raise ArgumentError, "invalid purpose #{value.inspect}" unless value.match?(/\A[A-Za-z0-9]{0,4}\z/)
end
@purpose = value
end
Expand Down
6 changes: 6 additions & 0 deletions test/girocode_test.rb
Original file line number Diff line number Diff line change
Expand Up @@ -30,4 +30,10 @@ def test_only_one_reference
end
end

def test_purpose_rejects_gap_characters
assert_raises ArgumentError do
Girocode.new(bic: 'BHBLDEHHXXX', name: 'Franz Mustermann', iban: 'DE71110220330123456789', currency: :eur, amount: 12.3, purpose: '[')
end
end

end
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