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package block
import (
"bytes"
"encoding/hex"
"encoding/json"
"io/ioutil"
"testing"
)
type dblExample struct {
input []byte
output []byte
}
// Load dbl test vectors from dbl.tjson
// TODO: switch to a native Go TJSON parser when available
func loadDblExamples() []dblExample {
var examplesJSON map[string]interface{}
exampleData, err := ioutil.ReadFile("../vectors/dbl.tjson")
if err != nil {
panic(err)
}
if err = json.Unmarshal(exampleData, &examplesJSON); err != nil {
panic(err)
}
examplesArray := examplesJSON["examples:A<O>"].([]interface{})
if examplesArray == nil {
panic("no toplevel 'examples:A<O>' key in dbl.tjson")
}
result := make([]dblExample, len(examplesArray))
for i, exampleJSON := range examplesArray {
example := exampleJSON.(map[string]interface{})
inputHex := example["input:d16"].(string)
input := make([]byte, hex.DecodedLen(len(inputHex)))
if _, err := hex.Decode(input, []byte(inputHex)); err != nil {
panic(err)
}
outputHex := example["output:d16"].(string)
output := make([]byte, hex.DecodedLen(len(outputHex)))
if _, err := hex.Decode(output, []byte(outputHex)); err != nil {
panic(err)
}
result[i] = dblExample{input, output}
}
return result
}
func TestDbl(t *testing.T) {
for i, tt := range loadDblExamples() {
var b Block
copy(b[:], tt.input)
b.Dbl()
if !bytes.Equal(b[:], tt.output) {
t.Errorf("test %d: dbl mismatch\n\twant %x\n\thave %x", i, tt.output, b)
continue
}
}
}
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