1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
|
// Copyright 2012 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 doc
import (
"bytes"
"flag"
"fmt"
"go/parser"
"go/printer"
"go/token"
"io/ioutil"
"os"
"path/filepath"
"regexp"
"strings"
"testing"
"text/template"
)
var update = flag.Bool("update", false, "update golden (.out) files")
var files = flag.String("files", "", "consider only Go test files matching this regular expression")
const dataDir = "testdata"
var templateTxt = readTemplate("template.txt")
func readTemplate(filename string) *template.Template {
t := template.New(filename)
t.Funcs(template.FuncMap{
"node": nodeFmt,
"synopsis": synopsisFmt,
"indent": indentFmt,
})
return template.Must(t.ParseFiles(filepath.Join(dataDir, filename)))
}
func nodeFmt(node interface{}, fset *token.FileSet) string {
var buf bytes.Buffer
printer.Fprint(&buf, fset, node)
return strings.Replace(strings.TrimSpace(buf.String()), "\n", "\n\t", -1)
}
func synopsisFmt(s string) string {
const n = 64
if len(s) > n {
// cut off excess text and go back to a word boundary
s = s[0:n]
if i := strings.LastIndexAny(s, "\t\n "); i >= 0 {
s = s[0:i]
}
s = strings.TrimSpace(s) + " ..."
}
return "// " + strings.Replace(s, "\n", " ", -1)
}
func indentFmt(indent, s string) string {
end := ""
if strings.HasSuffix(s, "\n") {
end = "\n"
s = s[:len(s)-1]
}
return indent + strings.Replace(s, "\n", "\n"+indent, -1) + end
}
func isGoFile(fi os.FileInfo) bool {
name := fi.Name()
return !fi.IsDir() &&
len(name) > 0 && name[0] != '.' && // ignore .files
filepath.Ext(name) == ".go"
}
type bundle struct {
*Package
FSet *token.FileSet
}
func test(t *testing.T, mode Mode) {
// determine file filter
filter := isGoFile
if *files != "" {
rx, err := regexp.Compile(*files)
if err != nil {
t.Fatal(err)
}
filter = func(fi os.FileInfo) bool {
return isGoFile(fi) && rx.MatchString(fi.Name())
}
}
// get packages
fset := token.NewFileSet()
pkgs, err := parser.ParseDir(fset, dataDir, filter, parser.ParseComments)
if err != nil {
t.Fatal(err)
}
// test packages
for _, pkg := range pkgs {
importpath := dataDir + "/" + pkg.Name
doc := New(pkg, importpath, mode)
// golden files always use / in filenames - canonicalize them
for i, filename := range doc.Filenames {
doc.Filenames[i] = filepath.ToSlash(filename)
}
// print documentation
var buf bytes.Buffer
if err := templateTxt.Execute(&buf, bundle{doc, fset}); err != nil {
t.Error(err)
continue
}
got := buf.Bytes()
// update golden file if necessary
golden := filepath.Join(dataDir, fmt.Sprintf("%s.%d.golden", pkg.Name, mode))
if *update {
err := ioutil.WriteFile(golden, got, 0644)
if err != nil {
t.Error(err)
}
continue
}
// get golden file
want, err := ioutil.ReadFile(golden)
if err != nil {
t.Error(err)
continue
}
// compare
if !bytes.Equal(got, want) {
t.Errorf("package %s\n\tgot:\n%s\n\twant:\n%s", pkg.Name, got, want)
}
}
}
func Test(t *testing.T) {
test(t, 0)
test(t, AllDecls)
test(t, AllMethods)
}
|
