78 lines
1.5 KiB
Go
78 lines
1.5 KiB
Go
// Copyright (C) 2014 Jakob Borg
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package luhn_test
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import (
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"testing"
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"github.com/calmh/luhn"
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)
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func TestGenerate(t *testing.T) {
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// Base 6 Luhn
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a := luhn.Alphabet("abcdef")
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c, err := a.Generate("abcdef")
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if err != nil {
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t.Fatal(err)
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}
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if c != 'e' {
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t.Errorf("Incorrect check digit %c != e", c)
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}
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// Base 10 Luhn
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a = luhn.Alphabet("0123456789")
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c, err = a.Generate("7992739871")
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if err != nil {
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t.Fatal(err)
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}
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if c != '3' {
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t.Errorf("Incorrect check digit %c != 3", c)
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}
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}
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func TestInvalidString(t *testing.T) {
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a := luhn.Alphabet("ABC")
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_, err := a.Generate("7992739871")
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t.Log(err)
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if err == nil {
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t.Error("Unexpected nil error")
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}
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}
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func TestBadAlphabet(t *testing.T) {
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_, err := luhn.NewAlphabet("01234566789")
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t.Log(err)
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if err == nil {
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t.Error("Unexpected nil error")
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}
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}
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func TestValidate(t *testing.T) {
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a := luhn.Alphabet("abcdef")
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if !a.Validate("abcdefe") {
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t.Errorf("Incorrect validation response for abcdefe")
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}
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if a.Validate("abcdefd") {
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t.Errorf("Incorrect validation response for abcdefd")
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}
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}
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func TestValidateRosetta(t *testing.T) {
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// http://rosettacode.org/wiki/Luhn_test_of_credit_card_numbers
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a := luhn.Alphabet("0123456789")
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cases := []struct {
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v string
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ok bool
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}{
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{"49927398716", true},
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{"49927398717", false},
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{"1234567812345678", false},
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{"1234567812345670", true},
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}
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for _, tc := range cases {
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if res := a.Validate(tc.v); res != tc.ok {
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t.Errorf("Validate(%q) => %v, expected %v", tc.v, res, tc.ok)
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}
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}
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}
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