1e2379df1b
The previous implementation was very generic; its tests didn't cover the actual alphabet for device IDs. Benchmark results on amd64: name old time/op new time/op delta Luhnify-8 1.00µs ± 1% 0.28µs ± 4% -72.38% (p=0.000 n=9+10) Unluhnify-8 992ns ± 2% 274ns ± 1% -72.39% (p=0.000 n=10+9)
27 lines
481 B
Go
27 lines
481 B
Go
// Copyright (C) 2014 The Protocol Authors.
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package protocol
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import (
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"strings"
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"testing"
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)
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func TestLuhn32(t *testing.T) {
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c, err := luhn32("AB725E4GHIQPL3ZFGT")
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if err != nil {
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t.Fatal(err)
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}
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if c != 'G' {
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t.Errorf("Incorrect check digit %c != G", c)
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}
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_, err = luhn32("3734EJEKMRHWPZQTWYQ1")
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if err == nil {
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t.Error("Unexpected nil error")
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}
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if !strings.Contains(err.Error(), "'1'") {
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t.Errorf("luhn32 should have errored on digit '1', got %v", err)
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}
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}
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