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
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
|
// Copyright 2015 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 runes
import (
"strings"
"testing"
"unicode"
"golang.org/x/text/cases"
"golang.org/x/text/language"
"golang.org/x/text/transform"
)
var (
toUpper = cases.Upper(language.Und)
toLower = cases.Lower(language.Und)
)
type spanformer interface {
transform.SpanningTransformer
}
func TestPredicate(t *testing.T) {
testConditional(t, func(rt *unicode.RangeTable, t, f spanformer) spanformer {
return If(Predicate(func(r rune) bool {
return unicode.Is(rt, r)
}), t, f)
})
}
func TestIn(t *testing.T) {
testConditional(t, func(rt *unicode.RangeTable, t, f spanformer) spanformer {
return If(In(rt), t, f)
})
}
func TestNotIn(t *testing.T) {
testConditional(t, func(rt *unicode.RangeTable, t, f spanformer) spanformer {
return If(NotIn(rt), f, t)
})
}
func testConditional(t *testing.T, f func(rt *unicode.RangeTable, t, f spanformer) spanformer) {
lower := f(unicode.Latin, toLower, toLower)
for i, tt := range []transformTest{{
desc: "empty",
szDst: large,
atEOF: true,
in: "",
out: "",
outFull: "",
t: lower,
}, {
desc: "small",
szDst: 1,
atEOF: true,
in: "B",
out: "b",
outFull: "b",
errSpan: transform.ErrEndOfSpan,
t: lower,
}, {
desc: "short dst",
szDst: 2,
atEOF: true,
in: "AAA",
out: "aa",
outFull: "aaa",
err: transform.ErrShortDst,
errSpan: transform.ErrEndOfSpan,
t: lower,
}, {
desc: "short dst writing error",
szDst: 1,
atEOF: false,
in: "A\x80",
out: "a",
outFull: "a\x80",
err: transform.ErrShortDst,
errSpan: transform.ErrEndOfSpan,
t: lower,
}, {
desc: "short dst writing incomplete rune",
szDst: 2,
atEOF: true,
in: "Σ\xc2",
out: "Σ",
outFull: "Σ\xc2",
err: transform.ErrShortDst,
t: f(unicode.Latin, toLower, nil),
}, {
desc: "short dst, longer",
szDst: 5,
atEOF: true,
in: "Hellø",
out: "Hell",
outFull: "Hellø",
err: transform.ErrShortDst,
// idem is used to test short buffers by forcing processing of full-rune increments.
t: f(unicode.Latin, Map(idem), nil),
}, {
desc: "short dst, longer, writing error",
szDst: 6,
atEOF: false,
in: "\x80Hello\x80",
out: "\x80Hello",
outFull: "\x80Hello\x80",
err: transform.ErrShortDst,
t: f(unicode.Latin, Map(idem), nil),
}, {
desc: "short src",
szDst: 2,
atEOF: false,
in: "A\xc2",
out: "a",
outFull: "a\xc2",
err: transform.ErrShortSrc,
errSpan: transform.ErrEndOfSpan,
t: lower,
}, {
desc: "short src no change",
szDst: 2,
atEOF: false,
in: "a\xc2",
out: "a",
outFull: "a\xc2",
err: transform.ErrShortSrc,
errSpan: transform.ErrShortSrc,
nSpan: 1,
t: lower,
}, {
desc: "invalid input, atEOF",
szDst: large,
atEOF: true,
in: "\x80",
out: "\x80",
outFull: "\x80",
t: lower,
}, {
desc: "invalid input, !atEOF",
szDst: large,
atEOF: false,
in: "\x80",
out: "\x80",
outFull: "\x80",
t: lower,
}, {
desc: "invalid input, incomplete rune atEOF",
szDst: large,
atEOF: true,
in: "\xc2",
out: "\xc2",
outFull: "\xc2",
t: lower,
}, {
desc: "nop",
szDst: large,
atEOF: true,
in: "Hello World!",
out: "Hello World!",
outFull: "Hello World!",
t: f(unicode.Latin, nil, nil),
}, {
desc: "nop in",
szDst: large,
atEOF: true,
in: "THIS IS α ΤΕΣΤ",
out: "this is α ΤΕΣΤ",
outFull: "this is α ΤΕΣΤ",
errSpan: transform.ErrEndOfSpan,
t: f(unicode.Greek, nil, toLower),
}, {
desc: "nop in latin",
szDst: large,
atEOF: true,
in: "THIS IS α ΤΕΣΤ",
out: "THIS IS α τεστ",
outFull: "THIS IS α τεστ",
errSpan: transform.ErrEndOfSpan,
t: f(unicode.Latin, nil, toLower),
}, {
desc: "nop not in",
szDst: large,
atEOF: true,
in: "THIS IS α ΤΕΣΤ",
out: "this is α ΤΕΣΤ",
outFull: "this is α ΤΕΣΤ",
errSpan: transform.ErrEndOfSpan,
t: f(unicode.Latin, toLower, nil),
}, {
desc: "pass atEOF is true when at end",
szDst: large,
atEOF: true,
in: "hello",
out: "HELLO",
outFull: "HELLO",
errSpan: transform.ErrEndOfSpan,
t: f(unicode.Latin, upperAtEOF{}, nil),
}, {
desc: "pass atEOF is true when at end of segment",
szDst: large,
atEOF: true,
in: "hello ",
out: "HELLO ",
outFull: "HELLO ",
errSpan: transform.ErrEndOfSpan,
t: f(unicode.Latin, upperAtEOF{}, nil),
}, {
desc: "don't pass atEOF is true when atEOF is false",
szDst: large,
atEOF: false,
in: "hello",
out: "",
outFull: "HELLO",
err: transform.ErrShortSrc,
errSpan: transform.ErrShortSrc,
t: f(unicode.Latin, upperAtEOF{}, nil),
}, {
desc: "pass atEOF is true when at end, no change",
szDst: large,
atEOF: true,
in: "HELLO",
out: "HELLO",
outFull: "HELLO",
t: f(unicode.Latin, upperAtEOF{}, nil),
}, {
desc: "pass atEOF is true when at end of segment, no change",
szDst: large,
atEOF: true,
in: "HELLO ",
out: "HELLO ",
outFull: "HELLO ",
t: f(unicode.Latin, upperAtEOF{}, nil),
}, {
desc: "large input ASCII",
szDst: 12000,
atEOF: false,
in: strings.Repeat("HELLO", 2000),
out: strings.Repeat("hello", 2000),
outFull: strings.Repeat("hello", 2000),
errSpan: transform.ErrEndOfSpan,
err: nil,
t: lower,
}, {
desc: "large input non-ASCII",
szDst: 12000,
atEOF: false,
in: strings.Repeat("\u3333", 2000),
out: strings.Repeat("\u3333", 2000),
outFull: strings.Repeat("\u3333", 2000),
err: nil,
t: lower,
}} {
tt.check(t, i)
}
}
// upperAtEOF is a strange Transformer that converts text to uppercase, but only
// if atEOF is true.
type upperAtEOF struct{ transform.NopResetter }
func (upperAtEOF) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
if !atEOF {
return 0, 0, transform.ErrShortSrc
}
return toUpper.Transform(dst, src, atEOF)
}
func (upperAtEOF) Span(src []byte, atEOF bool) (n int, err error) {
if !atEOF {
return 0, transform.ErrShortSrc
}
return toUpper.Span(src, atEOF)
}
func BenchmarkConditional(b *testing.B) {
doBench(b, If(In(unicode.Hangul), transform.Nop, transform.Nop))
}
|
