neoneo-go/pkg/core/interop/binary/itoa_test.go
Evgenii Stratonikov e4bf531e3e core: implement System.Binary.Atoi/Itoa syscalls
They follow C# conversion rules, but differ from our `bigint` module
conversions:
1. String must be big-endian.
2. Sign extension is 4-bit in size (single hex character)
   and not 8-byte.
2020-11-10 16:15:10 +03:00

98 lines
2.5 KiB
Go

package binary
import (
"errors"
"math"
"math/big"
"testing"
"github.com/nspcc-dev/neo-go/pkg/core/interop"
"github.com/nspcc-dev/neo-go/pkg/vm"
"github.com/stretchr/testify/require"
)
func TestItoa(t *testing.T) {
var testCases = []struct {
num *big.Int
base *big.Int
result string
}{
{big.NewInt(0), big.NewInt(10), "0"},
{big.NewInt(0), big.NewInt(16), "0"},
{big.NewInt(1), big.NewInt(10), "1"},
{big.NewInt(-1), big.NewInt(10), "-1"},
{big.NewInt(1), big.NewInt(16), "1"},
{big.NewInt(7), big.NewInt(16), "7"},
{big.NewInt(8), big.NewInt(16), "08"},
{big.NewInt(65535), big.NewInt(16), "0FFFF"},
{big.NewInt(15), big.NewInt(16), "0F"},
{big.NewInt(-1), big.NewInt(16), "F"},
}
for _, tc := range testCases {
ic := &interop.Context{VM: vm.New()}
ic.VM.Estack().PushVal(tc.base)
ic.VM.Estack().PushVal(tc.num)
require.NoError(t, Itoa(ic))
require.Equal(t, tc.result, ic.VM.Estack().Pop().String())
ic = &interop.Context{VM: vm.New()}
ic.VM.Estack().PushVal(tc.base)
ic.VM.Estack().PushVal(tc.result)
require.NoError(t, Atoi(ic))
require.Equal(t, tc.num, ic.VM.Estack().Pop().BigInt())
}
t.Run("-1", func(t *testing.T) {
for _, s := range []string{"FF", "FFF", "FFFF"} {
ic := &interop.Context{VM: vm.New()}
ic.VM.Estack().PushVal(16)
ic.VM.Estack().PushVal(s)
require.NoError(t, Atoi(ic))
require.Equal(t, big.NewInt(-1), ic.VM.Estack().Pop().BigInt())
}
})
}
func TestItoaError(t *testing.T) {
var testCases = []struct {
num *big.Int
base *big.Int
err error
}{
{big.NewInt(1), big.NewInt(13), ErrInvalidBase},
{big.NewInt(-1), new(big.Int).Add(big.NewInt(math.MaxInt64), big.NewInt(10)), ErrInvalidBase},
}
for _, tc := range testCases {
ic := &interop.Context{VM: vm.New()}
ic.VM.Estack().PushVal(tc.base)
ic.VM.Estack().PushVal(tc.num)
err := Itoa(ic)
require.True(t, errors.Is(err, tc.err), "got: %v", err)
}
}
func TestAtoiError(t *testing.T) {
var testCases = []struct {
num string
base *big.Int
err error
}{
{"1", big.NewInt(13), ErrInvalidBase},
{"1", new(big.Int).Add(big.NewInt(math.MaxInt64), big.NewInt(16)), ErrInvalidBase},
{"1_000", big.NewInt(10), ErrInvalidFormat},
{"FE", big.NewInt(10), ErrInvalidFormat},
{"XD", big.NewInt(16), ErrInvalidFormat},
}
for _, tc := range testCases {
ic := &interop.Context{VM: vm.New()}
ic.VM.Estack().PushVal(tc.base)
ic.VM.Estack().PushVal(tc.num)
err := Atoi(ic)
require.True(t, errors.Is(err, tc.err), "got: %v", err)
}
}