[#XX] Fixed problem with TestContract_Add

Panic occurred due to absence of context.
Changed the loop condition, CurrInstr() changed to NextInstr(),
removed an attempt to get context from vm before poppint value
from the estack (also in Test).

Signed-off-by: Lebedeva Ekaterina <ekaterina.lebedeva@yadro.com>

FirstContract/contract/contract.go

@@ -38,3 +38,7 @@ func PutNumber(key []byte, num int) {
 	ctx := storage.GetContext()
 	storage.Put(ctx, append([]byte{prefixNumber}, key...), num)
 }
+
+func Add(a, b int) int {
+	return a + b
+}

FirstContract/contract/neo-go.yml

@@ -1,11 +1,3 @@
 name: FirstContract
-sourceurl: http://example.com/
 safemethods: []
 supportedstandards: []
-events:
-    - name: Hello world!
-      parameters:
-        - name: args
-          type: Array
-permissions:
-    - methods: '*'

FirstContract/tests/contract_test.go

@@ -1,11 +1,16 @@
 package tests
 
 import (
+	"fmt"
+	"os"
 	"path"
 	"testing"
 
+	_ "github.com/nspcc-dev/neo-go/pkg/compiler"
 	"github.com/nspcc-dev/neo-go/pkg/neotest"
 	"github.com/nspcc-dev/neo-go/pkg/neotest/chain"
+	"github.com/nspcc-dev/neo-go/pkg/smartcontract/callflag"
+	"github.com/nspcc-dev/neo-go/pkg/vm"
 	"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
 )
 
@@ -48,3 +53,42 @@ func TestContract_InvalidKey(t *testing.T) {
 	inv.InvokeFail(t, "Invalid key size", "putNumber", invalidKey, 42)
 	inv.InvokeFail(t, "Invalid key size", "getNumber", invalidKey)
 }
+
+func TestContract_Add(t *testing.T) {
+	e := newExecutor(t)
+	ctrAdd := neotest.CompileFile(t, e.CommitteeHash, ctrPath, path.Join(ctrPath, "neo-go.yml"))
+	e.DeployContract(t, ctrAdd, nil)
+	inv := e.CommitteeInvoker(ctrAdd.Hash)
+	inv.Invoke(t, 3, "add", 1, 2)
+
+	govm := vm.New()
+	govm.LoadNEFMethod(ctrAdd.NEF, ctrAdd.Hash, ctrAdd.Hash, callflag.All, true, 170, -1, nil)
+	govm.Context().Estack().PushVal(1)
+	govm.Context().Estack().PushVal(2)
+
+	fmt.Println("\nPrinting opcodes:")
+	for !govm.HasStopped() {
+		nStr, curInstr := govm.Context().NextInstr()
+		fmt.Println(nStr, " ", curInstr)
+		govm.Step()
+	}
+
+	res := govm.Estack().Pop().Value()
+	fmt.Println("\nresult = ", res)
+}
+
+func Test(t *testing.T) {
+	govm := vm.New()
+	err := govm.LoadFileWithFlags(path.Join(ctrPath, "contract.nef"), callflag.All)
+	if err != nil {
+		fmt.Fprintln(os.Stderr, "NEF loading failed")
+		t.FailNow()
+	}
+	govm.PrintOps(os.Stdout)
+	govm.Context().Jump(170)
+	govm.Context().Estack().PushVal(1)
+	govm.Context().Estack().PushVal(2)
+	govm.Run()
+	res := govm.Estack().Pop().Value()
+	fmt.Println(res)
+}