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
|
// Copyright 2012-2015 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
use super::UnicodeSegmentation;
use std::prelude::v1::*;
#[test]
fn test_graphemes() {
use crate::testdata::{TEST_DIFF, TEST_SAME};
pub const EXTRA_DIFF: &'static [(
&'static str,
&'static [&'static str],
&'static [&'static str],
)] = &[
// Official test suite doesn't include two Prepend chars between two other chars.
(
"\u{20}\u{600}\u{600}\u{20}",
&["\u{20}", "\u{600}\u{600}\u{20}"],
&["\u{20}", "\u{600}", "\u{600}", "\u{20}"],
),
// Test for Prepend followed by two Any chars
(
"\u{600}\u{20}\u{20}",
&["\u{600}\u{20}", "\u{20}"],
&["\u{600}", "\u{20}", "\u{20}"],
),
];
pub const EXTRA_SAME: &'static [(&'static str, &'static [&'static str])] = &[
// family emoji (more than two emoji joined by ZWJ)
(
"\u{1f468}\u{200d}\u{1f467}\u{200d}\u{1f466}",
&["\u{1f468}\u{200d}\u{1f467}\u{200d}\u{1f466}"],
),
// cartwheel emoji followed by two fitzpatrick skin tone modifiers
// (test case from issue #19)
(
"\u{1F938}\u{1F3FE}\u{1F3FE}",
&["\u{1F938}\u{1F3FE}\u{1F3FE}"],
),
];
for &(s, g) in TEST_SAME.iter().chain(EXTRA_SAME) {
// test forward iterator
assert!(UnicodeSegmentation::graphemes(s, true).eq(g.iter().cloned()));
assert!(UnicodeSegmentation::graphemes(s, false).eq(g.iter().cloned()));
// test reverse iterator
assert!(UnicodeSegmentation::graphemes(s, true)
.rev()
.eq(g.iter().rev().cloned()));
assert!(UnicodeSegmentation::graphemes(s, false)
.rev()
.eq(g.iter().rev().cloned()));
}
for &(s, gt, gf) in TEST_DIFF.iter().chain(EXTRA_DIFF) {
// test forward iterator
assert!(UnicodeSegmentation::graphemes(s, true).eq(gt.iter().cloned()));
assert!(UnicodeSegmentation::graphemes(s, false).eq(gf.iter().cloned()));
// test reverse iterator
assert!(UnicodeSegmentation::graphemes(s, true)
.rev()
.eq(gt.iter().rev().cloned()));
assert!(UnicodeSegmentation::graphemes(s, false)
.rev()
.eq(gf.iter().rev().cloned()));
}
// test the indices iterators
let s = "a̐éö̲\r\n";
let gr_inds = UnicodeSegmentation::grapheme_indices(s, true).collect::<Vec<(usize, &str)>>();
let b: &[_] = &[(0, "a̐"), (3, "é"), (6, "ö̲"), (11, "\r\n")];
assert_eq!(gr_inds, b);
let gr_inds = UnicodeSegmentation::grapheme_indices(s, true)
.rev()
.collect::<Vec<(usize, &str)>>();
let b: &[_] = &[(11, "\r\n"), (6, "ö̲"), (3, "é"), (0, "a̐")];
assert_eq!(gr_inds, b);
let mut gr_inds_iter = UnicodeSegmentation::grapheme_indices(s, true);
{
let gr_inds = gr_inds_iter.by_ref();
let e1 = gr_inds.size_hint();
assert_eq!(e1, (1, Some(13)));
let c = gr_inds.count();
assert_eq!(c, 4);
}
let e2 = gr_inds_iter.size_hint();
assert_eq!(e2, (0, Some(0)));
// make sure the reverse iterator does the right thing with "\n" at beginning of string
let s = "\n\r\n\r";
let gr = UnicodeSegmentation::graphemes(s, true)
.rev()
.collect::<Vec<&str>>();
let b: &[_] = &["\r", "\r\n", "\n"];
assert_eq!(gr, b);
}
#[test]
fn test_words() {
use crate::testdata::TEST_WORD;
// Unicode's official tests don't really test longer chains of flag emoji
// TODO This could be improved with more tests like flag emoji with interspersed Extend chars and ZWJ
const EXTRA_TESTS: &'static [(&'static str, &'static [&'static str])] = &[
(
"🇦🇫🇦🇽🇦🇱🇩🇿🇦🇸🇦🇩🇦🇴",
&["🇦🇫", "🇦🇽", "🇦🇱", "🇩🇿", "🇦🇸", "🇦🇩", "🇦🇴"],
),
("🇦🇫🇦🇽🇦🇱🇩🇿🇦🇸🇦🇩🇦", &["🇦🇫", "🇦🇽", "🇦🇱", "🇩🇿", "🇦🇸", "🇦🇩", "🇦"]),
(
"🇦a🇫🇦🇽a🇦🇱🇩🇿🇦🇸🇦🇩🇦",
&["🇦", "a", "🇫🇦", "🇽", "a", "🇦🇱", "🇩🇿", "🇦🇸", "🇦🇩", "🇦"],
),
(
"\u{1f468}\u{200d}\u{1f468}\u{200d}\u{1f466}",
&["\u{1f468}\u{200d}\u{1f468}\u{200d}\u{1f466}"],
),
("😌👎🏼", &["😌", "👎🏼"]),
// perhaps wrong, spaces should not be included?
("hello world", &["hello", " ", "world"]),
("🇨🇦🇨🇭🇿🇲🇿 hi", &["🇨🇦", "🇨🇭", "🇿🇲", "🇿", " ", "hi"]),
];
for &(s, w) in TEST_WORD.iter().chain(EXTRA_TESTS.iter()) {
macro_rules! assert_ {
($test:expr, $exp:expr, $name:expr) => {
// collect into vector for better diagnostics in failure case
let testing = $test.collect::<Vec<_>>();
let expected = $exp.collect::<Vec<_>>();
assert_eq!(
testing, expected,
"{} test for testcase ({:?}, {:?}) failed.",
$name, s, w
)
};
}
// test forward iterator
assert_!(
s.split_word_bounds(),
w.iter().cloned(),
"Forward word boundaries"
);
// test reverse iterator
assert_!(
s.split_word_bounds().rev(),
w.iter().rev().cloned(),
"Reverse word boundaries"
);
// generate offsets from word string lengths
let mut indices = vec![0];
for i in w.iter().cloned().map(|s| s.len()).scan(0, |t, n| {
*t += n;
Some(*t)
}) {
indices.push(i);
}
indices.pop();
let indices = indices;
// test forward indices iterator
assert_!(
s.split_word_bound_indices().map(|(l, _)| l),
indices.iter().cloned(),
"Forward word indices"
);
// test backward indices iterator
assert_!(
s.split_word_bound_indices().rev().map(|(l, _)| l),
indices.iter().rev().cloned(),
"Reverse word indices"
);
}
}
#[test]
fn test_sentences() {
use crate::testdata::TEST_SENTENCE;
for &(s, w) in TEST_SENTENCE.iter() {
macro_rules! assert_ {
($test:expr, $exp:expr, $name:expr) => {
// collect into vector for better diagnostics in failure case
let testing = $test.collect::<Vec<_>>();
let expected = $exp.collect::<Vec<_>>();
assert_eq!(
testing, expected,
"{} test for testcase ({:?}, {:?}) failed.",
$name, s, w
)
};
}
assert_!(
s.split_sentence_bounds(),
w.iter().cloned(),
"Forward sentence boundaries"
);
}
}
quickcheck! {
fn quickcheck_forward_reverse_graphemes_extended(s: String) -> bool {
let a = s.graphemes(true).collect::<Vec<_>>();
let mut b = s.graphemes(true).rev().collect::<Vec<_>>();
b.reverse();
a == b
}
fn quickcheck_forward_reverse_graphemes_legacy(s: String) -> bool {
let a = s.graphemes(false).collect::<Vec<_>>();
let mut b = s.graphemes(false).rev().collect::<Vec<_>>();
b.reverse();
a == b
}
fn quickcheck_join_graphemes(s: String) -> bool {
let a = s.graphemes(true).collect::<String>();
let b = s.graphemes(false).collect::<String>();
a == s && b == s
}
fn quickcheck_forward_reverse_words(s: String) -> bool {
let a = s.split_word_bounds().collect::<Vec<_>>();
let mut b = s.split_word_bounds().rev().collect::<Vec<_>>();
b.reverse();
a == b
}
fn quickcheck_join_words(s: String) -> bool {
let a = s.split_word_bounds().collect::<String>();
a == s
}
}
|
