-
Notifications
You must be signed in to change notification settings - Fork 7.6k
/
matcher.go
154 lines (144 loc) · 3.16 KB
/
matcher.go
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
147
148
149
150
151
152
153
154
// Copyright Istio Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package resource
import (
"regexp"
"strconv"
"strings"
)
// testFilter is a regex matcher on a test. It is split by / following go subtest format
type testFilter []*regexp.Regexp
type Matcher struct {
filters []testFilter
}
// NewMatcher reimplements the logic of Go's -test.run. The code is mostly directly copied from Go's source.
func NewMatcher(regexs []string) (*Matcher, error) {
filters := []testFilter{}
for _, regex := range regexs {
filter := splitRegexp(regex)
for i, s := range filter {
filter[i] = rewrite(s)
}
rxs := []*regexp.Regexp{}
for _, f := range filter {
r, err := regexp.Compile(f)
if err != nil {
return nil, err
}
rxs = append(rxs, r)
}
filters = append(filters, rxs)
}
return &Matcher{filters: filters}, nil
}
func (m *Matcher) MatchTest(testName string) bool {
for _, f := range m.filters {
if matchSingle(f, testName) {
return true
}
}
return false
}
func matchSingle(filter testFilter, testName string) bool {
if len(filter) == 0 {
// No regex defined, we default to NOT matching. This ensures our default skips nothing
return false
}
elem := strings.Split(testName, "/")
if len(filter) > len(elem) {
return false
}
for i, s := range elem {
if i >= len(filter) {
break
}
if !filter[i].MatchString(s) {
return false
}
}
return true
}
// From go/src/testing/match.go
// nolint
func splitRegexp(s string) []string {
a := make([]string, 0, strings.Count(s, "/"))
cs := 0
cp := 0
for i := 0; i < len(s); {
switch s[i] {
case '[':
cs++
case ']':
if cs--; cs < 0 { // An unmatched ']' is legal.
cs = 0
}
case '(':
if cs == 0 {
cp++
}
case ')':
if cs == 0 {
cp--
}
case '\\':
i++
case '/':
if cs == 0 && cp == 0 {
a = append(a, s[:i])
s = s[i+1:]
i = 0
continue
}
}
i++
}
return append(a, s)
}
// rewrite rewrites a subname to having only printable characters and no white
// space.
// From go/src/testing/match.go
func rewrite(s string) string {
b := []byte{}
for _, r := range s {
switch {
case isSpace(r):
b = append(b, '_')
case !strconv.IsPrint(r):
s := strconv.QuoteRune(r)
b = append(b, s[1:len(s)-1]...)
default:
b = append(b, string(r)...)
}
}
return string(b)
}
// From go/src/testing/match.go
func isSpace(r rune) bool {
if r < 0x2000 {
switch r {
// Note: not the same as Unicode Z class.
case '\t', '\n', '\v', '\f', '\r', ' ', 0x85, 0xA0, 0x1680:
return true
}
} else {
if r <= 0x200a {
return true
}
switch r {
case 0x2028, 0x2029, 0x202f, 0x205f, 0x3000:
return true
}
}
return false
}