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collapse.rs
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collapse.rs
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use std::fs::{self, File};
use std::io::{self, BufRead, BufReader, Cursor};
use inferno::collapse::Collapse;
use libflate::gzip::Decoder;
use pretty_assertions::assert_eq;
use testing_logger::CapturedLog;
pub fn compare_results<R, E>(result: R, mut expected: E, expected_file: &str, strip_quotes: bool)
where
R: BufRead,
E: BufRead,
{
let mut buf = String::new();
let mut line_num = 1;
for line in result.lines() {
let line = if strip_quotes {
line.unwrap().replace('\"', "").replace('\'', "")
} else {
line.unwrap()
};
if expected.read_line(&mut buf).unwrap() == 0 {
panic!(
"\noutput has more lines than expected result file: {}",
expected_file
);
}
assert_eq!(line, buf.trim_end(), "\n{}:{}", expected_file, line_num);
buf.clear();
line_num += 1;
}
if expected.read_line(&mut buf).unwrap() > 0 {
panic!(
"\n{} has more lines than output, beginning at line: {}",
expected_file, line_num
)
}
}
pub fn test_collapse<C>(
mut collapser: C,
test_filename: &str,
expected_filename: &str,
strip_quotes: bool,
) -> io::Result<()>
where
C: Collapse,
{
if let Err(e) = fs::metadata(test_filename) {
eprintln!("Failed to open input file '{}'", test_filename);
return Err(e);
}
let mut collapse = move |out: &mut dyn io::Write| {
if test_filename.ends_with(".gz") {
let test_file = File::open(test_filename)?;
let r = BufReader::new(Decoder::new(test_file).unwrap());
collapser.collapse(r, out)
} else {
collapser.collapse_file(Some(test_filename), out)
}
};
let metadata = match fs::metadata(expected_filename) {
Ok(m) => m,
Err(e) => {
if e.kind() == io::ErrorKind::NotFound {
// be nice to the dev and make the file
let mut f = File::create(expected_filename).unwrap();
collapse(&mut f)?;
fs::metadata(expected_filename).unwrap()
} else {
eprintln!("Tried to open {}.", expected_filename);
return Err(e);
}
}
};
let expected_len = metadata.len() as usize;
let mut result = Cursor::new(Vec::with_capacity(expected_len));
collapse(&mut result)?;
let expected = BufReader::new(File::open(expected_filename)?);
// write out the expected result to /tmp for easy restoration
result.set_position(0);
let rand: u64 = rand::random();
let tm = std::env::temp_dir().join(format!("test-{}.folded", rand));
if fs::write(&tm, result.get_ref()).is_ok() {
eprintln!("test output in {}", tm.display());
}
// and then compare
compare_results(result, expected, expected_filename, strip_quotes);
Ok(())
}
pub fn test_collapse_logs<C, F>(mut collapser: C, input_file: &str, asserter: F)
where
C: Collapse,
F: Fn(&Vec<CapturedLog>),
{
testing_logger::setup();
let r = BufReader::new(File::open(input_file).unwrap());
collapser.collapse(r, std::io::sink()).unwrap();
testing_logger::validate(asserter);
}
pub fn test_collapse_error<C>(mut collapser: C, test_filename: &str) -> io::Error
where
C: Collapse,
{
if fs::metadata(test_filename).is_err() {
panic!("Failed to open input file '{}'", test_filename);
}
let mut collapse = move |out: &mut dyn io::Write| {
if test_filename.ends_with(".gz") {
let test_file = File::open(test_filename)?;
let r = BufReader::new(Decoder::new(test_file).unwrap());
collapser.collapse(r, out)
} else {
collapser.collapse_file(Some(test_filename), out)
}
};
collapse(&mut io::sink()).expect_err("Expected an error")
}