path: root/accounts/abi/numbers_test.go

package abi

import (
    "bytes"
    "math/big"
    "reflect"
    "testing"
)

func TestNumberTypes(t *testing.T) {
    ubytes := make([]byte, 32)
    ubytes[31] = 1
    sbytesmin := []byte{1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1}

    unsigned := U256(big.NewInt(1))
    if !bytes.Equal(unsigned, ubytes) {
        t.Error("expected %x got %x", ubytes, unsigned)
    }

    signed := S256(big.NewInt(1))
    if !bytes.Equal(signed, ubytes) {
        t.Error("expected %x got %x", ubytes, unsigned)
    }

    signed = S256(big.NewInt(-1))
    if !bytes.Equal(signed, sbytesmin) {
        t.Error("expected %x got %x", ubytes, unsigned)
    }
}

func TestPackNumber(t *testing.T) {
    ubytes := make([]byte, 32)
    ubytes[31] = 1
    sbytesmin := []byte{1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1}
    maxunsigned := []byte{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}

    packed := packNum(reflect.ValueOf(1), IntTy)
    if !bytes.Equal(packed, ubytes) {
        t.Errorf("expected %x got %x", ubytes, packed)
    }
    packed = packNum(reflect.ValueOf(-1), IntTy)
    if !bytes.Equal(packed, sbytesmin) {
        t.Errorf("expected %x got %x", ubytes, packed)
    }
    packed = packNum(reflect.ValueOf(1), UintTy)
    if !bytes.Equal(packed, ubytes) {
        t.Errorf("expected %x got %x", ubytes, packed)
    }
    packed = packNum(reflect.ValueOf(-1), UintTy)
    if !bytes.Equal(packed, maxunsigned) {
        t.Errorf("expected %x got %x", maxunsigned, packed)
    }

    packed = packNum(reflect.ValueOf("string"), UintTy)
    if packed != nil {
        t.Errorf("expected 'string' to pack to nil. got %x instead", packed)
    }
}

func TestSigned(t *testing.T) {
    if isSigned(reflect.ValueOf(uint(10))) {
        t.Error()
    }

    if !isSigned(reflect.ValueOf(int(10))) {
        t.Error()
    }

    if !isSigned(reflect.ValueOf(big.NewInt(10))) {
        t.Error()
    }
}