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|
package multihash_test
import (
"encoding/csv"
"fmt"
"os"
"strconv"
"strings"
"testing"
"github.com/multiformats/go-multihash"
_ "github.com/multiformats/go-multihash/register/all"
)
func TestSpec(t *testing.T) {
file, err := os.Open("spec/multicodec/table.csv")
if err != nil {
t.Skipf("Skipping test: %v", err)
}
defer file.Close()
reader := csv.NewReader(file)
reader.LazyQuotes = false
reader.FieldsPerRecord = 5
reader.TrimLeadingSpace = true
values, err := reader.ReadAll()
if err != nil {
t.Error(err)
}
expectedFunctions := make(map[uint64]string, len(values)-1)
if values[0][0] != "name" || values[0][1] != "tag" || values[0][2] != "code" {
t.Fatal("table format has changed")
}
for _, v := range values[1:] {
name := v[0]
tag := v[1]
codeStr := v[2]
if tag != "multihash" {
// not a multihash function
continue
}
var code uint64
if !strings.HasPrefix(codeStr, "0x") {
t.Errorf("invalid multicodec code %q (%s)", codeStr, name)
continue
}
i, err := strconv.ParseUint(codeStr[2:], 16, 64)
if err != nil {
t.Errorf("invalid multibase code %q (%s)", codeStr, name)
continue
}
code = uint64(i)
expectedFunctions[code] = name
}
for code, name := range multihash.Codes {
expectedName, ok := expectedFunctions[code]
if !ok {
t.Errorf("multihash %q (%x) not defined in the spec", name, code)
continue
}
if expectedName != name {
t.Errorf("encoding %q (%x) has unexpected name %q", expectedName, code, name)
}
}
}
func TestSpecVectors(t *testing.T) {
file, err := os.Open("spec/multihash/tests/values/test_cases.csv")
if err != nil {
t.Skipf("Skipping test: %v", err)
return
}
defer file.Close()
reader := csv.NewReader(file)
reader.LazyQuotes = false
reader.FieldsPerRecord = 4
reader.TrimLeadingSpace = true
values, err := reader.ReadAll()
if err != nil {
t.Error(err)
}
if len(values) == 0 {
t.Error("no test values")
return
}
// check the header.
if values[0][0] != "algorithm" ||
values[0][1] != "bits" ||
values[0][2] != "input" ||
values[0][3] != "multihash" {
t.Fatal("table format has changed")
}
for i, testCase := range values[1:] {
function := testCase[0]
lengthStr := testCase[1]
input := testCase[2]
expectedStr := testCase[3]
t.Run(fmt.Sprintf("%d/%s/%s", i, function, lengthStr), func(t *testing.T) {
code, ok := multihash.Names[function]
if !ok {
t.Skipf("skipping %s: not supported", function)
return
}
length, err := strconv.ParseInt(lengthStr, 10, 64)
if err != nil {
t.Fatalf("failed to decode length: %s", err)
}
if length%8 != 0 {
t.Fatal("expected the length to be a multiple of 8")
}
actual, err := multihash.Sum([]byte(input), code, int(length/8))
if err != nil {
t.Fatalf("failed to hash: %s", err)
}
actualStr := actual.HexString()
if actualStr != expectedStr {
t.Fatalf("got the wrong hash: expected %s, got %s", expectedStr, actualStr)
}
})
}
}
|
