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
use std::borrow;
use std::fmt;
use crate::reflection;
use crate::Predicate;
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct DifferencePredicate {
orig: borrow::Cow<'static, str>,
}
impl Predicate<str> for DifferencePredicate {
fn eval(&self, edit: &str) -> bool {
edit == self.orig
}
fn find_case<'a>(&'a self, expected: bool, variable: &str) -> Option<reflection::Case<'a>> {
let result = variable != self.orig;
if result == expected {
None
} else {
let palette = crate::Palette::current();
let orig: Vec<_> = self.orig.lines().map(|l| format!("{}\n", l)).collect();
let variable: Vec<_> = variable.lines().map(|l| format!("{}\n", l)).collect();
let diff = difflib::unified_diff(
&orig,
&variable,
"",
"",
&palette.expected.paint("orig").to_string(),
&palette.var.paint("var").to_string(),
0,
);
let mut diff = colorize_diff(diff, palette);
diff.insert(0, "\n".to_owned());
Some(
reflection::Case::new(Some(self), result).add_product(reflection::Product::new(
"diff",
itertools::join(diff.iter(), ""),
)),
)
}
}
}
impl reflection::PredicateReflection for DifferencePredicate {
fn parameters<'a>(&'a self) -> Box<dyn Iterator<Item = reflection::Parameter<'a>> + 'a> {
let params = vec![reflection::Parameter::new("original", &self.orig)];
Box::new(params.into_iter())
}
}
impl fmt::Display for DifferencePredicate {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
let palette = crate::Palette::current();
write!(
f,
"{} {} {}",
palette.description.paint("diff"),
palette.expected.paint("original"),
palette.var.paint("var"),
)
}
}
pub fn diff<S>(orig: S) -> DifferencePredicate
where
S: Into<borrow::Cow<'static, str>>,
{
DifferencePredicate { orig: orig.into() }
}
#[cfg(feature = "color")]
fn colorize_diff(mut lines: Vec<String>, palette: crate::Palette) -> Vec<String> {
for (i, line) in lines.iter_mut().enumerate() {
match (i, line.as_bytes().get(0)) {
(0, _) => {
if let Some((prefix, body)) = line.split_once(' ') {
*line = format!("{} {}", palette.expected.paint(prefix), body);
}
}
(1, _) => {
if let Some((prefix, body)) = line.split_once(' ') {
*line = format!("{} {}", palette.var.paint(prefix), body);
}
}
(_, Some(b'-')) => {
let (prefix, body) = line.split_at(1);
*line = format!("{}{}", palette.expected.paint(prefix), body);
}
(_, Some(b'+')) => {
let (prefix, body) = line.split_at(1);
*line = format!("{}{}", palette.var.paint(prefix), body);
}
(_, Some(b'@')) => {
*line = format!("{}", palette.description.paint(&line));
}
_ => (),
}
}
lines
}
#[cfg(not(feature = "color"))]
fn colorize_diff(lines: Vec<String>, _palette: crate::Palette) -> Vec<String> {
lines
}