mirror of
https://github.com/nspcc-dev/neo-go.git
synced 2024-10-16 23:46:26 +00:00
e4bf531e3e
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.
98 lines
2.5 KiB
Go
98 lines
2.5 KiB
Go
package binary
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import (
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"errors"
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"math"
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"math/big"
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"testing"
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"github.com/nspcc-dev/neo-go/pkg/core/interop"
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"github.com/nspcc-dev/neo-go/pkg/vm"
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"github.com/stretchr/testify/require"
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)
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func TestItoa(t *testing.T) {
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var testCases = []struct {
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num *big.Int
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base *big.Int
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result string
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}{
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{big.NewInt(0), big.NewInt(10), "0"},
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{big.NewInt(0), big.NewInt(16), "0"},
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{big.NewInt(1), big.NewInt(10), "1"},
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{big.NewInt(-1), big.NewInt(10), "-1"},
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{big.NewInt(1), big.NewInt(16), "1"},
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{big.NewInt(7), big.NewInt(16), "7"},
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{big.NewInt(8), big.NewInt(16), "08"},
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{big.NewInt(65535), big.NewInt(16), "0FFFF"},
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{big.NewInt(15), big.NewInt(16), "0F"},
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{big.NewInt(-1), big.NewInt(16), "F"},
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}
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for _, tc := range testCases {
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ic := &interop.Context{VM: vm.New()}
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ic.VM.Estack().PushVal(tc.base)
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ic.VM.Estack().PushVal(tc.num)
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require.NoError(t, Itoa(ic))
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require.Equal(t, tc.result, ic.VM.Estack().Pop().String())
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ic = &interop.Context{VM: vm.New()}
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ic.VM.Estack().PushVal(tc.base)
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ic.VM.Estack().PushVal(tc.result)
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require.NoError(t, Atoi(ic))
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require.Equal(t, tc.num, ic.VM.Estack().Pop().BigInt())
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}
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t.Run("-1", func(t *testing.T) {
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for _, s := range []string{"FF", "FFF", "FFFF"} {
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ic := &interop.Context{VM: vm.New()}
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ic.VM.Estack().PushVal(16)
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ic.VM.Estack().PushVal(s)
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require.NoError(t, Atoi(ic))
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require.Equal(t, big.NewInt(-1), ic.VM.Estack().Pop().BigInt())
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}
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})
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}
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func TestItoaError(t *testing.T) {
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var testCases = []struct {
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num *big.Int
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base *big.Int
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err error
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}{
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{big.NewInt(1), big.NewInt(13), ErrInvalidBase},
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{big.NewInt(-1), new(big.Int).Add(big.NewInt(math.MaxInt64), big.NewInt(10)), ErrInvalidBase},
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}
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for _, tc := range testCases {
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ic := &interop.Context{VM: vm.New()}
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ic.VM.Estack().PushVal(tc.base)
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ic.VM.Estack().PushVal(tc.num)
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err := Itoa(ic)
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require.True(t, errors.Is(err, tc.err), "got: %v", err)
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}
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}
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func TestAtoiError(t *testing.T) {
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var testCases = []struct {
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num string
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base *big.Int
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err error
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}{
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{"1", big.NewInt(13), ErrInvalidBase},
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{"1", new(big.Int).Add(big.NewInt(math.MaxInt64), big.NewInt(16)), ErrInvalidBase},
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{"1_000", big.NewInt(10), ErrInvalidFormat},
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{"FE", big.NewInt(10), ErrInvalidFormat},
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{"XD", big.NewInt(16), ErrInvalidFormat},
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}
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for _, tc := range testCases {
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ic := &interop.Context{VM: vm.New()}
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ic.VM.Estack().PushVal(tc.base)
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ic.VM.Estack().PushVal(tc.num)
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err := Atoi(ic)
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require.True(t, errors.Is(err, tc.err), "got: %v", err)
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}
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}
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