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
|
// Copyright 2019 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 reflectlite_test
import (
"fmt"
"go/ast"
"go/parser"
"go/token"
"io/fs"
"os"
"path/filepath"
"runtime"
"strings"
"sync"
"testing"
)
var typeNames = []string{
"rtype",
"uncommonType",
"arrayType",
"chanType",
"funcType",
"interfaceType",
"mapType",
"ptrType",
"sliceType",
"structType",
}
type visitor struct {
m map[string]map[string]bool
}
func newVisitor() visitor {
v := visitor{}
v.m = make(map[string]map[string]bool)
return v
}
func (v visitor) filter(name string) bool {
for _, typeName := range typeNames {
if typeName == name {
return true
}
}
return false
}
func (v visitor) Visit(n ast.Node) ast.Visitor {
switch x := n.(type) {
case *ast.TypeSpec:
if v.filter(x.Name.String()) {
if st, ok := x.Type.(*ast.StructType); ok {
v.m[x.Name.String()] = make(map[string]bool)
for _, field := range st.Fields.List {
k := fmt.Sprintf("%s", field.Type)
if len(field.Names) > 0 {
k = field.Names[0].Name
}
v.m[x.Name.String()][k] = true
}
}
}
}
return v
}
func loadTypes(path, pkgName string, v visitor) {
fset := token.NewFileSet()
filter := func(fi fs.FileInfo) bool {
return strings.HasSuffix(fi.Name(), ".go")
}
pkgs, err := parser.ParseDir(fset, path, filter, 0)
if err != nil {
panic(err)
}
pkg := pkgs[pkgName]
for _, f := range pkg.Files {
ast.Walk(v, f)
}
}
func TestMirrorWithReflect(t *testing.T) {
reflectDir := filepath.Join(runtime.GOROOT(), "src", "reflect")
if _, err := os.Stat(reflectDir); os.IsNotExist(err) {
// On some mobile builders, the test binary executes on a machine without a
// complete GOROOT source tree.
t.Skipf("GOROOT source not present")
}
var wg sync.WaitGroup
rl, r := newVisitor(), newVisitor()
for _, tc := range []struct {
path, pkg string
v visitor
}{
{".", "reflectlite", rl},
{reflectDir, "reflect", r},
} {
tc := tc
wg.Add(1)
go func() {
defer wg.Done()
loadTypes(tc.path, tc.pkg, tc.v)
}()
}
wg.Wait()
if len(rl.m) != len(r.m) {
t.Fatalf("number of types mismatch, reflect: %d, reflectlite: %d", len(r.m), len(rl.m))
}
for typName := range r.m {
if len(r.m[typName]) != len(rl.m[typName]) {
t.Errorf("type %s number of fields mismatch, reflect: %d, reflectlite: %d", typName, len(r.m[typName]), len(rl.m[typName]))
continue
}
for field := range r.m[typName] {
if _, ok := rl.m[typName][field]; !ok {
t.Errorf(`Field mismatch, reflect have "%s", relectlite does not.`, field)
}
}
}
}
|
