mirror of
https://github.com/nspcc-dev/neo-go.git
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103 lines
2.3 KiB
Go
103 lines
2.3 KiB
Go
package vm_test
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import (
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"fmt"
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"strings"
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"testing"
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"github.com/CityOfZion/neo-go/pkg/vm"
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"github.com/CityOfZion/neo-go/pkg/vm/compiler"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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)
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type testCase struct {
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name string
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src string
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result interface{}
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}
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func runTestCases(t *testing.T, tcases []testCase) {
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for _, tcase := range tcases {
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t.Run(tcase.name, func(t *testing.T) { eval(t, tcase.src, tcase.result) })
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}
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}
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func eval(t *testing.T, src string, result interface{}) {
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vm := vmAndCompile(t, src)
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err := vm.Run()
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require.NoError(t, err)
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assertResult(t, vm, result)
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}
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func evalWithArgs(t *testing.T, src string, op []byte, args []vm.StackItem, result interface{}) {
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vm := vmAndCompile(t, src)
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vm.LoadArgs(op, args)
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err := vm.Run()
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require.NoError(t, err)
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assertResult(t, vm, result)
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}
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func assertResult(t *testing.T, vm *vm.VM, result interface{}) {
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assert.Equal(t, result, vm.PopResult())
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assert.Equal(t, 0, vm.Astack().Len())
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assert.Equal(t, 0, vm.Istack().Len())
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}
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func vmAndCompile(t *testing.T, src string) *vm.VM {
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vm := vm.New()
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storePlugin := newStoragePlugin()
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vm.RegisterInteropFunc("Neo.Storage.Get", storePlugin.Get, 1)
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vm.RegisterInteropFunc("Neo.Storage.Put", storePlugin.Put, 1)
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vm.RegisterInteropFunc("Neo.Storage.GetContext", storePlugin.GetContext, 1)
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b, err := compiler.Compile(strings.NewReader(src))
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if err != nil {
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t.Fatal(err)
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}
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vm.Load(b)
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return vm
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}
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type storagePlugin struct {
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mem map[string][]byte
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}
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func newStoragePlugin() *storagePlugin {
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return &storagePlugin{
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mem: make(map[string][]byte),
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}
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}
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func (s *storagePlugin) Delete(vm *vm.VM) error {
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vm.Estack().Pop()
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key := vm.Estack().Pop().Bytes()
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delete(s.mem, string(key))
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return nil
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}
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func (s *storagePlugin) Put(vm *vm.VM) error {
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vm.Estack().Pop()
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key := vm.Estack().Pop().Bytes()
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value := vm.Estack().Pop().Bytes()
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s.mem[string(key)] = value
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return nil
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}
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func (s *storagePlugin) Get(vm *vm.VM) error {
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vm.Estack().Pop()
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item := vm.Estack().Pop().Bytes()
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if val, ok := s.mem[string(item)]; ok {
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vm.Estack().PushVal(val)
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return nil
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}
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return fmt.Errorf("could not find %+v", item)
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}
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func (s *storagePlugin) GetContext(vm *vm.VM) error {
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// Pushing anything on the stack here will work. This is just to satisfy
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// the compiler, thinking it has pushed the context ^^.
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vm.Estack().PushVal(10)
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return nil
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}
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