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extern crate file;
#[macro_use(assert_diff)]
extern crate difference;
extern crate libsyntax2;
use std::path::{PathBuf, Path};
use std::fs::read_dir;
use std::fmt::Write;
use libsyntax2::{Token, tokenize};
#[test]
fn lexer_tests() {
for test_case in lexer_test_cases() {
lexer_test_case(&test_case);
}
}
fn lexer_test_dir() -> PathBuf {
let dir = env!("CARGO_MANIFEST_DIR");
PathBuf::from(dir).join("tests/data/lexer")
}
fn lexer_test_cases() -> Vec<PathBuf> {
let mut acc = Vec::new();
let dir = lexer_test_dir();
for file in read_dir(&dir).unwrap() {
let file = file.unwrap();
let path = file.path();
if path.extension().unwrap_or_default() == "rs" {
acc.push(path);
}
}
acc.sort();
acc
}
fn lexer_test_case(path: &Path) {
let actual = {
let text = file::get_text(path).unwrap();
let tokens = tokenize(&text);
dump_tokens(&tokens, &text)
};
let expected = file::get_text(&path.with_extension("txt")).unwrap();
let expected = expected.as_str();
let actual = actual.as_str();
if expected == actual {
return
}
if expected.trim() == actual.trim() {
panic!("Whitespace difference!")
}
assert_diff!(expected, actual, "\n", 0)
}
fn dump_tokens(tokens: &[Token], text: &str) -> String {
let mut acc = String::new();
let mut offset = 0;
for token in tokens {
let len: u32 = token.len.into();
let len = len as usize;
let token_text = &text[offset..offset + len];
offset += len;
write!(acc, "{:?} {} {:?}\n", token.kind, token.len, token_text).unwrap()
}
acc
}
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