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extern crate difference;
extern crate itertools;
extern crate text_unit;
use itertools::Itertools;
use std::fmt;
use text_unit::{TextRange, TextUnit};
pub use self::difference::Changeset as __Changeset;
pub const CURSOR_MARKER: &str = "<|>";
#[macro_export]
macro_rules! assert_eq_text {
($expected:expr, $actual:expr) => {{
let expected = $expected;
let actual = $actual;
if expected != actual {
let changeset = $crate::__Changeset::new(actual, expected, "\n");
println!("Expected:\n{}\n\nActual:\n{}\nDiff:{}\n", expected, actual, changeset);
panic!("text differs");
}
}};
($expected:expr, $actual:expr, $($tt:tt)*) => {{
let expected = $expected;
let actual = $actual;
if expected != actual {
let changeset = $crate::__Changeset::new(actual, expected, "\n");
println!("Expected:\n{}\n\nActual:\n{}\n\nDiff:\n{}\n", expected, actual, changeset);
println!($($tt)*);
panic!("text differs");
}
}};
}
pub fn assert_eq_dbg(expected: &str, actual: &impl fmt::Debug) {
let actual = format!("{:?}", actual);
let expected = expected.lines().map(|l| l.trim()).join(" ");
assert_eq!(expected, actual);
}
pub fn extract_offset(text: &str) -> (TextUnit, String) {
match try_extract_offset(text) {
None => panic!("text should contain cursor marker"),
Some(result) => result,
}
}
pub fn try_extract_offset(text: &str) -> Option<(TextUnit, String)> {
let cursor_pos = text.find(CURSOR_MARKER)?;
let mut new_text = String::with_capacity(text.len() - CURSOR_MARKER.len());
new_text.push_str(&text[..cursor_pos]);
new_text.push_str(&text[cursor_pos + CURSOR_MARKER.len()..]);
let cursor_pos = TextUnit::from(cursor_pos as u32);
Some((cursor_pos, new_text))
}
pub fn extract_range(text: &str) -> (TextRange, String) {
match try_extract_range(text) {
None => panic!("text should contain cursor marker"),
Some(result) => result,
}
}
pub fn try_extract_range(text: &str) -> Option<(TextRange, String)> {
let (start, text) = try_extract_offset(text)?;
let (end, text) = try_extract_offset(&text)?;
Some((TextRange::from_to(start, end), text))
}
pub fn extract_ranges(text: &str) -> (Vec<TextRange>, String) {
let mut ranges = Vec::new();
let mut text = String::from(text);
while let Some((range, new_text)) = try_extract_range(&text) {
text = new_text;
ranges.push(range);
}
(ranges, text)
}
pub fn add_cursor(text: &str, offset: TextUnit) -> String {
let offset: u32 = offset.into();
let offset: usize = offset as usize;
let mut res = String::new();
res.push_str(&text[..offset]);
res.push_str("<|>");
res.push_str(&text[offset..]);
res
}
#[derive(Debug)]
pub struct FixtureEntry {
pub meta: String,
pub text: String,
}
/// Parses text wich looks like this:
///
/// ```notrust
/// //- some meta
/// line 1
/// line 2
/// // - other meta
/// ```
pub fn parse_fixture(fixture: &str) -> Vec<FixtureEntry> {
let mut res = Vec::new();
let mut buf = String::new();
let mut meta: Option<&str> = None;
macro_rules! flush {
() => {
if let Some(meta) = meta {
res.push(FixtureEntry { meta: meta.to_string(), text: buf.clone() });
buf.clear();
}
};
};
let margin = fixture.lines()
.filter(|it| it.trim_start().starts_with("//-"))
.map(|it| it.len() - it.trim_start().len())
.next().expect("empty fixture");
let lines = fixture.lines()
.filter_map(|line| {
if line.len() >= margin {
assert!(line[..margin].trim().is_empty());
Some(&line[margin..])
} else {
assert!(line.trim().is_empty());
None
}
});
for line in lines {
if line.starts_with("//-") {
flush!();
buf.clear();
meta = Some(line["//-".len()..].trim());
continue;
}
buf.push_str(line);
buf.push('\n');
}
flush!();
res
}
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