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extern crate itertools;
use std::hash;
use itertools::Itertools;
#[derive(Debug, Eq)]
pub struct Test {
pub name: String,
pub text: String,
}
impl PartialEq for Test {
fn eq(&self, other: &Test) -> bool {
self.name.eq(&other.name)
}
}
impl hash::Hash for Test {
fn hash<H: hash::Hasher>(&self, state: &mut H) {
self.name.hash(state)
}
}
pub fn collect_tests(s: &str) -> Vec<(usize, Test)> {
let mut res = vec![];
let prefix = "// ";
let comment_blocks = s
.lines()
.map(str::trim_left)
.enumerate()
.group_by(|(_idx, line)| line.starts_with(prefix));
'outer: for (is_comment, block) in comment_blocks.into_iter() {
if !is_comment {
continue;
}
let mut block = block.map(|(idx, line)| (idx, &line[prefix.len()..]));
let (start_line, name) = loop {
match block.next() {
Some((idx, line)) if line.starts_with("test ") => {
break (idx, line["test ".len()..].to_string())
},
Some(_) => (),
None => continue 'outer,
}
};
let text: String = itertools::join(
block.map(|(_, line)| line)
.chain(::std::iter::once("")),
"\n"
);
assert!(!text.trim().is_empty() && text.ends_with("\n"));
res.push((start_line, Test {name, text }))
}
res
}
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