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|
//! Test helpers.
use crate::{Range, Selection};
use ropey::Rope;
use smallvec::SmallVec;
use std::cmp::Reverse;
use unicode_segmentation::UnicodeSegmentation;
/// Convert annotated test string to test string and selection.
///
/// `#[|` for primary selection with head before anchor followed by `]#`.
/// `#(|` for secondary selection with head before anchor followed by `)#`.
/// `#[` for primary selection with head after anchor followed by `|]#`.
/// `#(` for secondary selection with head after anchor followed by `|)#`.
///
/// If the selection contains any LF or CRLF sequences, which are immediately
/// followed by the same grapheme, then the subsequent one is removed. This is
/// to allow representing having the cursor over the end of the line.
///
/// # Examples
///
/// ```
/// use helix_core::{Range, Selection, test::print};
/// use smallvec::smallvec;
///
/// assert_eq!(
/// print("#[a|]#b#(|c)#"),
/// ("abc".to_owned(), Selection::new(smallvec![Range::new(0, 1), Range::new(3, 2)], 0))
/// );
/// ```
///
/// # Panics
///
/// Panics when missing primary or appeared more than once.
/// Panics when missing head or anchor.
/// Panics when head come after head or anchor come after anchor.
pub fn print(s: &str) -> (String, Selection) {
let mut primary_idx = None;
let mut ranges = SmallVec::new();
let mut iter = UnicodeSegmentation::graphemes(s, true).peekable();
let mut left = String::with_capacity(s.len());
'outer: while let Some(c) = iter.next() {
let start = left.chars().count();
if c != "#" {
left.push_str(c);
continue;
}
let (is_primary, close_pair) = match iter.next() {
Some("[") => (true, "]"),
Some("(") => (false, ")"),
Some(ch) => {
left.push('#');
left.push_str(ch);
continue;
}
None => break,
};
if is_primary && primary_idx.is_some() {
panic!("primary `#[` already appeared {:?} {:?}", left, s);
}
let head_at_beg = iter.next_if_eq(&"|").is_some();
let last_grapheme = |s: &str| {
UnicodeSegmentation::graphemes(s, true)
.last()
.map(String::from)
};
while let Some(c) = iter.next() {
let next = iter.peek();
let mut prev = last_grapheme(left.as_str());
if !(c == close_pair && next == Some(&"#")) {
left.push_str(c);
continue;
}
if !head_at_beg {
match &prev {
Some(p) if p != "|" => {
left.push_str(c);
continue;
}
Some(p) if p == "|" => {
left.pop().unwrap(); // pop the |
prev = last_grapheme(left.as_str());
}
_ => (),
}
}
iter.next(); // skip "#"
let next = iter.peek();
// skip explicit line end inside selection
if (prev == Some(String::from("\r\n")) || prev == Some(String::from("\n")))
&& next.map(|n| String::from(*n)) == prev
{
iter.next();
}
if is_primary {
primary_idx = Some(ranges.len());
}
let (anchor, head) = match head_at_beg {
true => (left.chars().count(), start),
false => (start, left.chars().count()),
};
ranges.push(Range::new(anchor, head));
continue 'outer;
}
if head_at_beg {
panic!("missing end `{}#` {:?} {:?}", close_pair, left, s);
} else {
panic!("missing end `|{}#` {:?} {:?}", close_pair, left, s);
}
}
let primary = match primary_idx {
Some(i) => i,
None => panic!("missing primary `#[|]#` {:?}", s),
};
let selection = Selection::new(ranges, primary);
(left, selection)
}
/// Convert test string and selection to annotated test string.
///
/// `#[|` for primary selection with head before anchor followed by `]#`.
/// `#(|` for secondary selection with head before anchor followed by `)#`.
/// `#[` for primary selection with head after anchor followed by `|]#`.
/// `#(` for secondary selection with head after anchor followed by `|)#`.
///
/// # Examples
///
/// ```
/// use helix_core::{Range, Selection, test::plain};
/// use smallvec::smallvec;
///
/// assert_eq!(
/// plain("abc", &Selection::new(smallvec![Range::new(0, 1), Range::new(3, 2)], 0)),
/// "#[a|]#b#(|c)#".to_owned()
/// );
/// ```
pub fn plain<R: Into<Rope>>(s: R, selection: &Selection) -> String {
let s = s.into();
let primary = selection.primary_index();
let mut out = String::with_capacity(s.len_bytes() + 5 * selection.len());
out.push_str(&s.to_string());
let mut insertion: Vec<_> = selection
.iter()
.enumerate()
.flat_map(|(i, range)| {
// sort like this before reversed so anchor < head later
match (range.anchor < range.head, i == primary) {
(true, true) => [(range.anchor, "#["), (range.head, "|]#")],
(true, false) => [(range.anchor, "#("), (range.head, "|)#")],
(false, true) => [(range.anchor, "]#"), (range.head, "#[|")],
(false, false) => [(range.anchor, ")#"), (range.head, "#(|")],
}
})
.map(|(char_idx, marker)| (s.char_to_byte(char_idx), marker))
.collect();
// insert in reverse order
insertion.sort_unstable_by_key(|k| Reverse(k.0));
for (i, s) in insertion {
out.insert_str(i, s);
}
out
}
#[cfg(test)]
#[allow(clippy::module_inception)]
mod test {
use super::*;
#[test]
fn print_single() {
assert_eq!(
(String::from("hello"), Selection::single(1, 0)),
print("#[|h]#ello")
);
assert_eq!(
(String::from("hello"), Selection::single(0, 1)),
print("#[h|]#ello")
);
assert_eq!(
(String::from("hello"), Selection::single(4, 0)),
print("#[|hell]#o")
);
assert_eq!(
(String::from("hello"), Selection::single(0, 4)),
print("#[hell|]#o")
);
assert_eq!(
(String::from("hello"), Selection::single(5, 0)),
print("#[|hello]#")
);
assert_eq!(
(String::from("hello"), Selection::single(0, 5)),
print("#[hello|]#")
);
}
#[test]
fn print_multi() {
assert_eq!(
(
String::from("hello"),
Selection::new(
SmallVec::from_slice(&[Range::new(1, 0), Range::new(5, 4)]),
0
)
),
print("#[|h]#ell#(|o)#")
);
assert_eq!(
(
String::from("hello"),
Selection::new(
SmallVec::from_slice(&[Range::new(0, 1), Range::new(4, 5)]),
0
)
),
print("#[h|]#ell#(o|)#")
);
assert_eq!(
(
String::from("hello"),
Selection::new(
SmallVec::from_slice(&[Range::new(2, 0), Range::new(5, 3)]),
0
)
),
print("#[|he]#l#(|lo)#")
);
assert_eq!(
(
String::from("hello\r\nhello\r\nhello\r\n"),
Selection::new(
SmallVec::from_slice(&[
Range::new(7, 5),
Range::new(21, 19),
Range::new(14, 12)
]),
0
)
),
print("hello#[|\r\n]#hello#(|\r\n)#hello#(|\r\n)#")
);
}
#[test]
fn print_multi_byte_code_point() {
assert_eq!(
(String::from("„“"), Selection::single(1, 0)),
print("#[|„]#“")
);
assert_eq!(
(String::from("„“"), Selection::single(2, 1)),
print("„#[|“]#")
);
assert_eq!(
(String::from("„“"), Selection::single(0, 1)),
print("#[„|]#“")
);
assert_eq!(
(String::from("„“"), Selection::single(1, 2)),
print("„#[“|]#")
);
assert_eq!(
(String::from("they said „hello“"), Selection::single(11, 10)),
print("they said #[|„]#hello“")
);
}
#[test]
fn print_multi_code_point_grapheme() {
assert_eq!(
(
String::from("hello 👨👩👧👦 goodbye"),
Selection::single(13, 6)
),
print("hello #[|👨👩👧👦]# goodbye")
);
}
#[test]
fn plain_single() {
assert_eq!("#[|h]#ello", plain("hello", &Selection::single(1, 0)));
assert_eq!("#[h|]#ello", plain("hello", &Selection::single(0, 1)));
assert_eq!("#[|hell]#o", plain("hello", &Selection::single(4, 0)));
assert_eq!("#[hell|]#o", plain("hello", &Selection::single(0, 4)));
assert_eq!("#[|hello]#", plain("hello", &Selection::single(5, 0)));
assert_eq!("#[hello|]#", plain("hello", &Selection::single(0, 5)));
}
#[test]
fn plain_multi() {
assert_eq!(
plain(
"hello",
&Selection::new(
SmallVec::from_slice(&[Range::new(1, 0), Range::new(5, 4)]),
0
)
),
String::from("#[|h]#ell#(|o)#")
);
assert_eq!(
plain(
"hello",
&Selection::new(
SmallVec::from_slice(&[Range::new(0, 1), Range::new(4, 5)]),
0
)
),
String::from("#[h|]#ell#(o|)#")
);
assert_eq!(
plain(
"hello",
&Selection::new(
SmallVec::from_slice(&[Range::new(2, 0), Range::new(5, 3)]),
0
)
),
String::from("#[|he]#l#(|lo)#")
);
assert_eq!(
plain(
"hello\r\nhello\r\nhello\r\n",
&Selection::new(
SmallVec::from_slice(&[
Range::new(7, 5),
Range::new(21, 19),
Range::new(14, 12)
]),
0
)
),
String::from("hello#[|\r\n]#hello#(|\r\n)#hello#(|\r\n)#")
);
}
#[test]
fn plain_multi_byte_code_point() {
assert_eq!(
plain("„“", &Selection::single(1, 0)),
String::from("#[|„]#“")
);
assert_eq!(
plain("„“", &Selection::single(2, 1)),
String::from("„#[|“]#")
);
assert_eq!(
plain("„“", &Selection::single(0, 1)),
String::from("#[„|]#“")
);
assert_eq!(
plain("„“", &Selection::single(1, 2)),
String::from("„#[“|]#")
);
assert_eq!(
plain("they said „hello“", &Selection::single(11, 10)),
String::from("they said #[|„]#hello“")
);
}
#[test]
fn plain_multi_code_point_grapheme() {
assert_eq!(
plain("hello 👨👩👧👦 goodbye", &Selection::single(13, 6)),
String::from("hello #[|👨👩👧👦]# goodbye")
);
}
}
|
