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use std::fs::rename;
use std::io;
use crate::defaults::*;
use crate::khline::KhLine;
use crate::utils::fileutil;
use crate::KhResult;
pub fn write_cursorfile(line: &str) -> KhResult<()> {
let tmpfilename = get_datafile("tmpcursor");
fileutil::write_file(&tmpfilename, line)?;
let cursorfile = get_cursorfile();
rename(tmpfilename, cursorfile)?;
Ok(())
}
pub fn read_cursorfile() -> io::Result<KhLine> {
let cursorfile = get_cursorfile();
debug!("Reading cursor file: {}", cursorfile.to_string_lossy());
let lines = fileutil::read_lines_from_file(&cursorfile)?.collect::<Vec<String>>();
if lines.len() > 1 {
Err(io::Error::new(io::ErrorKind::Other, "too many lines in cursorfile"))
} else {
lines[0].parse::<KhLine>().map_err(|err| io::Error::new(io::ErrorKind::Other, err.to_string()))
}
}
#[cfg(test)]
mod tests {
use super::*;
use std::fs;
use crate::testutils::*;
use assert_fs::prelude::*;
use predicates::prelude::*;
use crate::utils::fileutil;
#[test]
fn read_cursorfile_ok() {
let testdir = prepare_testdir("testdir_with_cursor");
let khline = read_cursorfile().unwrap();
let mut khline_string = khline.to_string();
khline_string.push('\n');
let predicate = predicate::str::similar(khline_string);
testdir.child(".khaleesi/cursor").assert(predicate);
}
#[test]
fn read_cursorfile_empty() {
let _testdir = prepare_testdir("testdir");
let cursorfile = read_cursorfile();
assert!(cursorfile.is_err());
}
#[test]
fn read_cursorfile_broken() {
let testdir = prepare_testdir("testdir_with_cursor");
fileutil::append_file(testdir.child(".khaleesi/cursor").path(), "\nx").unwrap();
let cursorfile = read_cursorfile();
assert!(cursorfile.is_err());
}
#[test]
fn write_cursorfile_ok() {
let testdir = prepare_testdir("testdir");
let teststr = "Teststr äöüß\n";
let result = write_cursorfile(teststr);
testdir.child(".khaleesi/cursor").assert(teststr);
assert!(result.is_ok());
}
#[test]
fn write_cursorfile_failed() {
let testdir = prepare_testdir("testdir");
fs::create_dir(testdir.child(".khaleesi/cursor").path()).unwrap();
let result = write_cursorfile("abc");
assert!(result.is_err());
}
}
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