neo-go/pkg/vm/emit_test.go

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package vm
import (
"bytes"
"encoding/binary"
"testing"
"github.com/CityOfZion/neo-go/pkg/vm/opcode"
"github.com/stretchr/testify/assert"
)
func TestEmitInt(t *testing.T) {
buf := new(bytes.Buffer)
EmitInt(buf, 10)
assert.Equal(t, opcode.Opcode(buf.Bytes()[0]), opcode.PUSH10)
buf.Reset()
EmitInt(buf, 100)
assert.Equal(t, buf.Bytes()[0], uint8(1))
assert.Equal(t, buf.Bytes()[1], uint8(100))
buf.Reset()
EmitInt(buf, 1000)
assert.Equal(t, buf.Bytes()[0], uint8(2))
assert.Equal(t, buf.Bytes()[1:3], []byte{0xe8, 0x03})
}
func TestEmitBool(t *testing.T) {
buf := new(bytes.Buffer)
EmitBool(buf, true)
EmitBool(buf, false)
assert.Equal(t, opcode.Opcode(buf.Bytes()[0]), opcode.PUSH1)
assert.Equal(t, opcode.Opcode(buf.Bytes()[1]), opcode.PUSH0)
}
func TestEmitString(t *testing.T) {
buf := new(bytes.Buffer)
str := "City Of Zion"
EmitString(buf, str)
assert.Equal(t, buf.Len(), len(str)+1)
assert.Equal(t, buf.Bytes()[1:], []byte(str))
}
func TestEmitSyscall(t *testing.T) {
syscalls := []string{
"Neo.Runtime.Log",
"Neo.Runtime.Notify",
"Neo.Runtime.Whatever",
}
buf := new(bytes.Buffer)
for _, syscall := range syscalls {
EmitSyscall(buf, syscall)
assert.Equal(t, opcode.Opcode(buf.Bytes()[0]), opcode.SYSCALL)
assert.Equal(t, buf.Bytes()[1], uint8(len(syscall)))
assert.Equal(t, buf.Bytes()[2:], []byte(syscall))
buf.Reset()
}
}
func TestEmitCall(t *testing.T) {
buf := new(bytes.Buffer)
EmitCall(buf, opcode.JMP, 100)
assert.Equal(t, opcode.Opcode(buf.Bytes()[0]), opcode.JMP)
label := binary.LittleEndian.Uint16(buf.Bytes()[1:3])
assert.Equal(t, label, uint16(100))
}