Fixed handling text nodes by XPath parser (#715)

* Fixed handling text nodes by XPath parser

* Formatting

pkg/drivers/http/element_test.go

@@ -427,4 +427,25 @@ func TestElement(t *testing.T) {
 		So(err, ShouldBeNil)
 		So(v, ShouldEqual, 4)
 	})
+
+	Convey(".XPath", t, func() {
+		Convey("Text nodes", func() {
+			buff := bytes.NewBuffer([]byte(doc))
+
+			buff.Write([]byte(doc))
+
+			doc, err := goquery.NewDocumentFromReader(buff)
+
+			So(err, ShouldBeNil)
+
+			el, err := http.NewHTMLElement(doc.Find("html"))
+
+			So(err, ShouldBeNil)
+
+			nt, err := el.XPath(context.Background(), values.NewString("/head/title/text()"))
+
+			So(err, ShouldBeNil)
+			So(nt.String(), ShouldEqual, "[\"Album example for Bootstrap\"]")
+		})
+	})
 }

pkg/drivers/http/xpath.go

@@ -59,7 +59,9 @@ func EvalXPathToNodesWith(selection *goquery.Selection, expression string, mappe
 				return nil, err
 			}
 
-			items.Push(item)
+			if item != nil {
+				items.Push(item)
+			}
 		}
 
 		return items, nil
@@ -80,13 +82,25 @@ func EvalXPathTo(selection *goquery.Selection, expression string) (core.Value, e
 		items := values.NewArray(10)
 
 		for res.MoveNext() {
-			item, err := parseXPathNode(res.Current().(*htmlquery.NodeNavigator).Current())
+			var item core.Value
 
-			if err != nil {
-				return nil, err
+			node := res.Current().(*htmlquery.NodeNavigator).Current()
+
+			if node.Type == html.TextNode {
+				item = values.NewString(node.Data)
+			} else {
+				i, err := parseXPathNode(node)
+
+				if err != nil {
+					return nil, err
+				}
+
+				item = i
 			}
 
-			items.Push(item)
+			if item != nil {
+				items.Push(item)
+			}
 		}
 
 		return items, nil