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62 lines
1.3 KiB
62 lines
1.3 KiB
package words
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import (
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"testing"
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asrt "github.com/stretchr/testify/assert"
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cmn "github.com/tendermint/tmlibs/common"
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)
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var codecs = []ECC{
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NewIBMCRC16(),
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NewSCSICRC16(),
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NewCCITTCRC16(),
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NewIEEECRC32(),
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NewCastagnoliCRC32(),
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NewKoopmanCRC32(),
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NewISOCRC64(),
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NewECMACRC64(),
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}
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// TestECCPasses makes sure that the AddECC/CheckECC methods are symetric
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func TestECCPasses(t *testing.T) {
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assert := asrt.New(t)
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checks := append(codecs, NoECC{})
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for _, check := range checks {
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for i := 0; i < 2000; i++ {
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numBytes := cmn.RandInt()%60 + 1
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data := cmn.RandBytes(numBytes)
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checked := check.AddECC(data)
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res, err := check.CheckECC(checked)
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if assert.Nil(err, "%#v: %+v", check, err) {
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assert.Equal(data, res, "%v", check)
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}
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}
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}
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}
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// TestECCFails makes sure random data will (usually) fail the checksum
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func TestECCFails(t *testing.T) {
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assert := asrt.New(t)
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checks := codecs
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attempts := 2000
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for _, check := range checks {
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failed := 0
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for i := 0; i < attempts; i++ {
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numBytes := cmn.RandInt()%60 + 1
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data := cmn.RandBytes(numBytes)
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_, err := check.CheckECC(data)
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if err != nil {
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failed += 1
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}
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}
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// we allow up to 1 falsely accepted checksums, as there are random matches
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assert.InDelta(attempts, failed, 1, "%v", check)
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}
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}
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