feat(dom): add String method to DocumentFragment

fragment.go

@@ -17,6 +17,8 @@ func NewDocumentFragment(nodes []*html.Node) *DocumentFragment {
 	return &DocumentFragment{nodes: nodes}
 }
 
+func (d *DocumentFragment) String() string { return outerHTML(d.nodes...) }
+
 func (d *DocumentFragment) NodeType() spec.NodeType { return spec.NodeTypeDocumentFragment }
 
 func (d *DocumentFragment) CloneNode(deep bool) spec.Node {

fragment_test.go

@@ -367,3 +367,16 @@ func TestDocumentFragment_QuerySelectorAll(t *testing.T) {
 		require.Nil(t, fragment.QuerySelectorAll("#not-found"))
 	})
 }
+
+func TestDocumentFragment_String(t *testing.T) {
+	t.Run("found two", func(t *testing.T) {
+		rawHTML := `
+<section><div class="a" id="i1"></div></section>
+<section></section>
+<section><div class="a" id="i2"></div><div class="a" id="i3"></div></section>`
+
+		fragment := parseDocumentFragment(t, rawHTML)
+
+		assert.Equal(t, rawHTML, fragment.String())
+	})
+}

go.mod

@@ -1,6 +1,8 @@
 module github.com/crhntr/dom
 
-go 1.21
+go 1.22
+
+toolchain go1.22.4
 
 require (
 	github.com/andybalholm/cascadia v1.3.2
@@ -10,6 +12,7 @@ require (
 )
 
 require (
+	github.com/crhntr/hx v0.0.1-dev.2 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/kr/pretty v0.3.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect

go.sum

@@ -1,6 +1,8 @@
 github.com/andybalholm/cascadia v1.3.2 h1:3Xi6Dw5lHF15JtdcmAHD3i1+T8plmv7BQ/nsViSLyss=
 github.com/andybalholm/cascadia v1.3.2/go.mod h1:7gtRlve5FxPPgIgX36uWBX58OdBsSS6lUvCFb+h7KvU=
 github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
+github.com/crhntr/hx v0.0.1-dev.2 h1:aw1f1XnbVhLwpvm+dGpVRpBDlkaHwTSUHiHRjSinTzk=
+github.com/crhntr/hx v0.0.1-dev.2/go.mod h1:wKtm+v8CXtOnWHIh9TYizRfDYaiN/j55AlJGt6fz180=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=

node.go

@@ -12,11 +12,12 @@ import (
 	"github.com/crhntr/dom/spec"
 )
 
-func outerHTML(node *html.Node) string {
+func outerHTML(nodes ...*html.Node) string {
 	var buf bytes.Buffer
-	err := html.Render(&buf, node)
-	if err != nil {
-		return ""
+	for _, node := range nodes {
+		if err := html.Render(&buf, node); err != nil {
+			return ""
+		}
 	}
 	return buf.String()
 }