Fix #160: Preserve CDATA content when converting XML to JSON

CDATA sections were being silently ignored during XML-to-JSON conversion
because the NodeToJSON function only handled TextNode types, not CharDataNode.
This caused data loss when using the -j flag on XML with CDATA sections.

Changes:
- Add CharDataNode handling to all text processing in jsonutil.go
- Add test demonstrating CDATA content is preserved in JSON output

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: bukzor

cmd/root_test.go

@@ -8,6 +8,7 @@ import (
 	"strings"
 	"testing"
 
+	"github.com/antchfx/xmlquery"
 	"github.com/sibprogrammer/xq/internal/utils"
 	"github.com/spf13/cobra"
 	"github.com/spf13/pflag"
@@ -102,6 +103,17 @@ func TestRootCmd(t *testing.T) {
 	assert.ErrorContains(t, err, "invalid argument")
 }
 
+func TestCDATASupport(t *testing.T) {
+	input := "<root><![CDATA[1 & 2]]></root>"
+	doc, err := xmlquery.Parse(strings.NewReader(input))
+	assert.Nil(t, err)
+
+	result := utils.NodeToJSON(doc, 10)
+	expected := map[string]interface{}{"root": "1 & 2"}
+
+	assert.Equal(t, expected, result)
+}
+
 func TestProcessAsJSON(t *testing.T) {
 	tests := []struct {
 		name        string

internal/utils/jsonutil.go

@@ -21,7 +21,7 @@ func NodeToJSON(node *xmlquery.Node, depth int) interface{} {
 		var textParts []string
 
 		// Process the next sibling of the document node first (if any)
-		if node.NextSibling != nil && node.NextSibling.Type == xmlquery.TextNode {
+		if node.NextSibling != nil && (node.NextSibling.Type == xmlquery.TextNode || node.NextSibling.Type == xmlquery.CharDataNode) {
 			text := strings.TrimSpace(node.NextSibling.Data)
 			if text != "" {
 				textParts = append(textParts, text)
@@ -34,7 +34,7 @@ func NodeToJSON(node *xmlquery.Node, depth int) interface{} {
 			case xmlquery.ElementNode:
 				childResult := nodeToJSONInternal(child, depth)
 				result[child.Data] = childResult
-			case xmlquery.TextNode:
+			case xmlquery.TextNode, xmlquery.CharDataNode: // Text and CDATA
 				text := strings.TrimSpace(child.Data)
 				if text != "" {
 					textParts = append(textParts, text)
@@ -50,7 +50,7 @@ func NodeToJSON(node *xmlquery.Node, depth int) interface{} {
 	case xmlquery.ElementNode:
 		return nodeToJSONInternal(node, depth)
 
-	case xmlquery.TextNode:
+	case xmlquery.TextNode, xmlquery.CharDataNode: // Text and CDATA
 		return strings.TrimSpace(node.Data)
 
 	default:
@@ -71,7 +71,7 @@ func nodeToJSONInternal(node *xmlquery.Node, depth int) interface{} {
 	var textParts []string
 	for child := node.FirstChild; child != nil; child = child.NextSibling {
 		switch child.Type {
-		case xmlquery.TextNode:
+		case xmlquery.TextNode, xmlquery.CharDataNode: // Text and CDATA
 			text := strings.TrimSpace(child.Data)
 			if text != "" {
 				textParts = append(textParts, text)
@@ -96,7 +96,7 @@ func getTextContent(node *xmlquery.Node) string {
 	var parts []string
 	for child := node.FirstChild; child != nil; child = child.NextSibling {
 		switch child.Type {
-		case xmlquery.TextNode:
+		case xmlquery.TextNode, xmlquery.CharDataNode: // Text and CDATA
 			text := strings.TrimSpace(child.Data)
 			if text != "" {
 				parts = append(parts, text)