70 lines
2.2 KiB
Go
70 lines
2.2 KiB
Go
package vm
|
|
|
|
import (
|
|
"bytes"
|
|
"strings"
|
|
"testing"
|
|
|
|
"github.com/ethereum/go-ethereum/common"
|
|
)
|
|
|
|
func TestMemoryCopy(t *testing.T) {
|
|
// Test cases from https://eips.ethereum.org/EIPS/eip-5656#test-cases
|
|
for i, tc := range []struct {
|
|
dst, src, len uint64
|
|
pre string
|
|
want string
|
|
}{
|
|
{ // MCOPY 0 32 32 - copy 32 bytes from offset 32 to offset 0.
|
|
0, 32, 32,
|
|
"0000000000000000000000000000000000000000000000000000000000000000 000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f",
|
|
"000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f 000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f",
|
|
},
|
|
|
|
{ // MCOPY 0 0 32 - copy 32 bytes from offset 0 to offset 0.
|
|
0, 0, 32,
|
|
"0101010101010101010101010101010101010101010101010101010101010101",
|
|
"0101010101010101010101010101010101010101010101010101010101010101",
|
|
},
|
|
{ // MCOPY 0 1 8 - copy 8 bytes from offset 1 to offset 0 (overlapping).
|
|
0, 1, 8,
|
|
"000102030405060708 000000000000000000000000000000000000000000000000",
|
|
"010203040506070808 000000000000000000000000000000000000000000000000",
|
|
},
|
|
{ // MCOPY 1 0 8 - copy 8 bytes from offset 0 to offset 1 (overlapping).
|
|
1, 0, 8,
|
|
"000102030405060708 000000000000000000000000000000000000000000000000",
|
|
"000001020304050607 000000000000000000000000000000000000000000000000",
|
|
},
|
|
// Tests below are not in the EIP, but maybe should be added
|
|
{ // MCOPY 0xFFFFFFFFFFFF 0xFFFFFFFFFFFF 0 - copy zero bytes from out-of-bounds index(overlapping).
|
|
0xFFFFFFFFFFFF, 0xFFFFFFFFFFFF, 0,
|
|
"11",
|
|
"11",
|
|
},
|
|
{ // MCOPY 0xFFFFFFFFFFFF 0 0 - copy zero bytes from start of mem to out-of-bounds.
|
|
0xFFFFFFFFFFFF, 0, 0,
|
|
"11",
|
|
"11",
|
|
},
|
|
{ // MCOPY 0 0xFFFFFFFFFFFF 0 - copy zero bytes from out-of-bounds to start of mem
|
|
0, 0xFFFFFFFFFFFF, 0,
|
|
"11",
|
|
"11",
|
|
},
|
|
} {
|
|
m := NewMemory()
|
|
// Clean spaces
|
|
data := common.FromHex(strings.ReplaceAll(tc.pre, " ", ""))
|
|
// Set pre
|
|
m.Resize(uint64(len(data)))
|
|
m.Set(0, uint64(len(data)), data)
|
|
// Do the copy
|
|
m.Copy(tc.dst, tc.src, tc.len)
|
|
want := common.FromHex(strings.ReplaceAll(tc.want, " ", ""))
|
|
if have := m.store; !bytes.Equal(want, have) {
|
|
t.Errorf("case %d: want: %#x\nhave: %#x\n", i, want, have)
|
|
}
|
|
}
|
|
}
|