neoneo-go/pkg/core/native_contract_test.go

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package core
import (
"errors"
"math/rand"
"testing"
"github.com/nspcc-dev/neo-go/pkg/core/interop"
"github.com/nspcc-dev/neo-go/pkg/core/transaction"
"github.com/nspcc-dev/neo-go/pkg/io"
"github.com/nspcc-dev/neo-go/pkg/smartcontract"
"github.com/nspcc-dev/neo-go/pkg/smartcontract/manifest"
"github.com/nspcc-dev/neo-go/pkg/vm"
"github.com/nspcc-dev/neo-go/pkg/vm/emit"
"github.com/stretchr/testify/require"
)
type testNative struct {
meta interop.ContractMD
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blocks chan uint32
}
func (tn *testNative) Initialize(_ *interop.Context) error {
return nil
}
func (tn *testNative) Metadata() *interop.ContractMD {
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return &tn.meta
}
func (tn *testNative) OnPersist(ic *interop.Context) error {
select {
case tn.blocks <- ic.Block.Index:
return nil
default:
return errors.New("error on persist")
}
}
var _ interop.Contract = (*testNative)(nil)
// registerNative registers native contract in the blockchain.
func (bc *Blockchain) registerNative(c interop.Contract) {
bc.contracts.Contracts = append(bc.contracts.Contracts, c)
}
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func newTestNative() *testNative {
tn := &testNative{
meta: *interop.NewContractMD("Test.Native.Sum"),
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blocks: make(chan uint32, 1),
}
desc := &manifest.Method{
Name: "sum",
Parameters: []manifest.Parameter{
manifest.NewParameter("addend1", smartcontract.IntegerType),
manifest.NewParameter("addend2", smartcontract.IntegerType),
},
ReturnType: smartcontract.IntegerType,
}
md := &interop.MethodAndPrice{
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Func: tn.sum,
Price: 1,
RequiredFlags: smartcontract.NoneFlag,
}
tn.meta.AddMethod(md, desc, true)
return tn
}
func (tn *testNative) sum(_ *interop.Context, args []vm.StackItem) vm.StackItem {
s1, err := args[0].TryInteger()
if err != nil {
panic(err)
}
s2, err := args[1].TryInteger()
if err != nil {
panic(err)
}
return vm.NewBigIntegerItem(s1.Add(s1, s2))
}
func TestNativeContract_Invoke(t *testing.T) {
chain := newTestChain(t)
defer chain.Close()
tn := newTestNative()
chain.registerNative(tn)
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w := io.NewBufBinWriter()
emit.AppCallWithOperationAndArgs(w.BinWriter, tn.Metadata().Hash, "sum", int64(14), int64(28))
script := w.Bytes()
tx := transaction.NewInvocationTX(script, 0)
mn := transaction.NewMinerTXWithNonce(rand.Uint32())
validUntil := chain.blockHeight + 1
tx.ValidUntilBlock = validUntil
mn.ValidUntilBlock = validUntil
require.NoError(t, addSender(tx, mn))
require.NoError(t, signTx(chain, tx, mn))
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b := chain.newBlock(mn, tx)
require.NoError(t, chain.AddBlock(b))
res, err := chain.GetAppExecResult(tx.Hash())
require.NoError(t, err)
require.Equal(t, "HALT", res.VMState)
require.Equal(t, 1, len(res.Stack))
require.Equal(t, smartcontract.IntegerType, res.Stack[0].Type)
require.EqualValues(t, 42, res.Stack[0].Value)
require.NoError(t, chain.persist())
select {
case index := <-tn.blocks:
require.Equal(t, chain.blockHeight, index)
default:
require.Fail(t, "onPersist wasn't called")
}
}