43 lines
1.5 KiB
Go
43 lines
1.5 KiB
Go
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package vm
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import (
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"math/big"
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"testing"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/params"
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)
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func TestByteOp(t *testing.T) {
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var (
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env = NewEVM(Context{}, nil, params.TestChainConfig, Config{EnableJit: false, ForceJit: false})
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stack = newstack()
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)
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tests := []struct {
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v string
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th uint64
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expected *big.Int
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}{
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{"ABCDEF0908070605040302010000000000000000000000000000000000000000", 0, big.NewInt(0xAB)},
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{"ABCDEF0908070605040302010000000000000000000000000000000000000000", 1, big.NewInt(0xCD)},
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{"00CDEF090807060504030201ffffffffffffffffffffffffffffffffffffffff", 0, big.NewInt(0x00)},
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{"00CDEF090807060504030201ffffffffffffffffffffffffffffffffffffffff", 1, big.NewInt(0xCD)},
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{"0000000000000000000000000000000000000000000000000000000000102030", 31, big.NewInt(0x30)},
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{"0000000000000000000000000000000000000000000000000000000000102030", 30, big.NewInt(0x20)},
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{"ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", 32, big.NewInt(0x0)},
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{"ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", 0xFFFFFFFFFFFFFFFF, big.NewInt(0x0)},
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}
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pc := uint64(0)
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for _, test := range tests {
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val := new(big.Int).SetBytes(common.Hex2Bytes(test.v))
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th := new(big.Int).SetUint64(test.th)
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stack.push(val)
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stack.push(th)
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opByte(&pc, env, nil, nil, stack)
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actual := stack.pop()
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if actual.Cmp(test.expected) != 0 {
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t.Fatalf("Expected [%v] %v:th byte to be %v, was %v.", test.v, test.th, test.expected, actual)
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}
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}
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}
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