core: add nativenames.IsValid

pkg/core/native/nativenames_test.go

@@ -0,0 +1,19 @@
+package native
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/nspcc-dev/neo-go/pkg/core/native/nativenames"
+	"github.com/stretchr/testify/require"
+)
+
+func TestNativenamesIsValid(t *testing.T) {
+	// test that all native names has been added to IsValid
+	contracts := NewContracts(true)
+	for _, c := range contracts.Contracts {
+		require.True(t, nativenames.IsValid(c.Metadata().Name), fmt.Errorf("add %s to nativenames.IsValid(...)", c))
+	}
+
+	require.False(t, nativenames.IsValid("unkonwn"))
+}