add tests to highligh null quoting issue

Signed-off-by: Alexander Bezzubov <[email protected]>

Author: bzz

.gitignore

@@ -4,3 +4,5 @@
 .sdk
 .config
 build
+node_modules
+.vscode

driver/normalizer/normalizer.go

@@ -36,7 +36,7 @@ var Preprocessors = []Mapping{
 	Map(
 		Part("_", Obj{
 			uast.KeyType: String("StringLiteral"),
-			"value":      AnyNode(nil),
+			"value": Any(),
 			"extra": Fields{
 				{Name: "raw", Op: Var("raw")},
 				{Name: "rawValue", Op: Any()},
@@ -360,7 +360,6 @@ func (op singleQuote) Check(st *State, n nodes.Node) (bool, error) {
 	if !strings.HasPrefix(s, `'`) || !strings.HasSuffix(s, `'`) {
 		return false, nil
 	}
-	s = s[1 : len(s)-1]
 	s, err := unquoteSingle(s)
 	if err != nil {
 		return false, err

driver/normalizer/strconv.go

@@ -11,6 +11,7 @@ import (
 
 // unquoteSingle is the same as strconv.Unquote, but uses ' as a quote.
 func unquoteSingle(s string) (string, error) {
+	s = s[1 : len(s)-1]
 	var runeTmp [utf8.UTFMax]byte
 	buf := make([]byte, 0, 3*len(s)/2)
 	for len(s) > 0 {

driver/normalizer/strconv_test.go

@@ -0,0 +1,41 @@
+package normalizer
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestUnquoteSingle_NullGo(t *testing.T) {
+	s, err := unquoteSingle("'\x00'")
+	require.NoError(t, err)
+
+	require.Equal(t, "\u0000", s)
+}
+
+func TestUnquoteSingle_NullJs(t *testing.T) {
+	s, err := unquoteSingle(`'\0'`)
+	require.NoError(t, err)
+
+	require.Equal(t, "\u0000", s)
+}
+
+func TestUnquoteSingle_NullAndQuoteBack(t *testing.T) {
+	const o = "'\x00'"
+
+	s, err := unquoteSingle(o)
+	require.NoError(t, err)
+	q := quoteSingle(s)
+
+	require.Equal(t, o, q)
+}
+
+func TestUnquoteSingle_StringAndQuoteBack(t *testing.T) {
+	const o = "'rand'"
+
+	s, err := unquoteSingle(o)
+	require.NoError(t, err)
+	q := quoteSingle(s)
+
+	require.Equal(t, o, q)
+}