8d4dd2d2e1
This allows easier reuse of opcodes and in some cases allows to eliminate dependencies on the whole vm package, like in compiler that only needs opcodes and doesn't care about VM for any other purpose. And yes, they're opcodes because an instruction is a whole thing with operands, that's what context.Next() returns.
65 lines
1.6 KiB
Go
65 lines
1.6 KiB
Go
package vm
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import (
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"bytes"
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"encoding/binary"
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"testing"
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"github.com/CityOfZion/neo-go/pkg/vm/opcode"
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"github.com/stretchr/testify/assert"
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)
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func TestEmitInt(t *testing.T) {
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buf := new(bytes.Buffer)
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EmitInt(buf, 10)
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assert.Equal(t, opcode.Opcode(buf.Bytes()[0]), opcode.PUSH10)
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buf.Reset()
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EmitInt(buf, 100)
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assert.Equal(t, buf.Bytes()[0], uint8(1))
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assert.Equal(t, buf.Bytes()[1], uint8(100))
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buf.Reset()
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EmitInt(buf, 1000)
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assert.Equal(t, buf.Bytes()[0], uint8(2))
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assert.Equal(t, buf.Bytes()[1:3], []byte{0xe8, 0x03})
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}
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func TestEmitBool(t *testing.T) {
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buf := new(bytes.Buffer)
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EmitBool(buf, true)
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EmitBool(buf, false)
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assert.Equal(t, opcode.Opcode(buf.Bytes()[0]), opcode.PUSH1)
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assert.Equal(t, opcode.Opcode(buf.Bytes()[1]), opcode.PUSH0)
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}
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func TestEmitString(t *testing.T) {
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buf := new(bytes.Buffer)
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str := "City Of Zion"
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EmitString(buf, str)
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assert.Equal(t, buf.Len(), len(str)+1)
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assert.Equal(t, buf.Bytes()[1:], []byte(str))
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}
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func TestEmitSyscall(t *testing.T) {
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syscalls := []string{
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"Neo.Runtime.Log",
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"Neo.Runtime.Notify",
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"Neo.Runtime.Whatever",
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}
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buf := new(bytes.Buffer)
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for _, syscall := range syscalls {
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EmitSyscall(buf, syscall)
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assert.Equal(t, opcode.Opcode(buf.Bytes()[0]), opcode.SYSCALL)
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assert.Equal(t, buf.Bytes()[1], uint8(len(syscall)))
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assert.Equal(t, buf.Bytes()[2:], []byte(syscall))
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buf.Reset()
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}
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}
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func TestEmitCall(t *testing.T) {
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buf := new(bytes.Buffer)
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EmitCall(buf, opcode.JMP, 100)
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assert.Equal(t, opcode.Opcode(buf.Bytes()[0]), opcode.JMP)
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label := binary.LittleEndian.Uint16(buf.Bytes()[1:3])
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assert.Equal(t, label, uint16(100))
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}
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