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// Copyright 2010 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package html
import (
"bufio"
"bytes"
"fmt"
"io"
"io/ioutil"
"os"
"strings"
"testing"
)
type devNull struct{}
func (devNull) Write(p []byte) (int, os.Error) {
return len(p), nil
}
func pipeErr(err os.Error) io.Reader {
pr, pw := io.Pipe()
pw.CloseWithError(err)
return pr
}
func readDat(filename string, c chan io.Reader) {
f, err := os.Open("testdata/webkit/"+filename, os.O_RDONLY, 0600)
if err != nil {
c <- pipeErr(err)
return
}
defer f.Close()
// Loop through the lines of the file. Each line beginning with "#" denotes
// a new section, which is returned as a separate io.Reader.
r := bufio.NewReader(f)
var pw *io.PipeWriter
for {
line, err := r.ReadSlice('\n')
if err != nil {
if pw != nil {
pw.CloseWithError(err)
pw = nil
} else {
c <- pipeErr(err)
}
return
}
if len(line) == 0 {
continue
}
if line[0] == '#' {
if pw != nil {
pw.Close()
}
var pr *io.PipeReader
pr, pw = io.Pipe()
c <- pr
continue
}
if line[0] != '|' {
// Strip the trailing '\n'.
line = line[:len(line)-1]
}
if pw != nil {
if _, err := pw.Write(line); err != nil {
pw.CloseWithError(err)
pw = nil
}
}
}
}
func dumpLevel(w io.Writer, n *Node, level int) os.Error {
io.WriteString(w, "| ")
for i := 0; i < level; i++ {
io.WriteString(w, " ")
}
switch n.Type {
case ErrorNode:
return os.NewError("unexpected ErrorNode")
case DocumentNode:
return os.NewError("unexpected DocumentNode")
case ElementNode:
fmt.Fprintf(w, "<%s>", EscapeString(n.Data))
case TextNode:
fmt.Fprintf(w, "%q", EscapeString(n.Data))
case CommentNode:
return os.NewError("COMMENT")
default:
return os.NewError("unknown node type")
}
io.WriteString(w, "\n")
for _, c := range n.Child {
if err := dumpLevel(w, c, level+1); err != nil {
return err
}
}
return nil
}
func dump(n *Node) (string, os.Error) {
if n == nil || len(n.Child) == 0 {
return "", nil
}
b := bytes.NewBuffer(nil)
for _, child := range n.Child {
if err := dumpLevel(b, child, 0); err != nil {
return "", err
}
}
return b.String(), nil
}
func TestParser(t *testing.T) {
// TODO(nigeltao): Process all the .dat files, not just the first one.
filenames := []string{
"tests1.dat",
}
for _, filename := range filenames {
rc := make(chan io.Reader)
go readDat(filename, rc)
// TODO(nigeltao): Process all test cases, not just a subset.
for i := 0; i < 22; i++ {
// Parse the #data section.
b, err := ioutil.ReadAll(<-rc)
if err != nil {
t.Fatal(err)
}
text := string(b)
doc, err := Parse(strings.NewReader(text))
if err != nil {
t.Fatal(err)
}
actual, err := dump(doc)
if err != nil {
t.Fatal(err)
}
// Skip the #error section.
if _, err := io.Copy(devNull{}, <-rc); err != nil {
t.Fatal(err)
}
// Compare the parsed tree to the #document section.
b, err = ioutil.ReadAll(<-rc)
if err != nil {
t.Fatal(err)
}
expected := string(b)
if actual != expected {
t.Errorf("%s test #%d %q, actual vs expected:\n----\n%s----\n%s----", filename, i, text, actual, expected)
}
}
}
}
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