syncthing/lib/protocol/luhn_test.go

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// Copyright (C) 2014 The Protocol Authors.
package protocol
import (
"strings"
"testing"
)
func TestLuhn32(t *testing.T) {
c, err := luhn32("AB725E4GHIQPL3ZFGT")
if err != nil {
t.Fatal(err)
}
if c != 'G' {
t.Errorf("Incorrect check digit %c != G", c)
}
_, err = luhn32("3734EJEKMRHWPZQTWYQ1")
if err == nil {
t.Error("Unexpected nil error")
}
if !strings.Contains(err.Error(), "'1'") {
t.Errorf("luhn32 should have errored on digit '1', got %v", err)
}
}