blob: 826cb109746dbf7f9a5cacf850ecd7bb355b1e18 [file] [log] [blame]
use super::{Changeset, Difference};
use std::fmt;
impl fmt::Display for Changeset {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
for d in &self.diffs {
match *d {
Difference::Same(ref x) => {
try!(write!(f, "{}{}", x, self.split));
Difference::Add(ref x) => {
try!(write!(f, "\x1b[92m{}\x1b[0m{}", x, self.split));
Difference::Rem(ref x) => {
try!(write!(f, "\x1b[91m{}\x1b[0m{}", x, self.split));
mod tests {
use super::super::Changeset;
use std::io::Write;
use std::iter::FromIterator;
use std::thread;
use std::time;
/// convert slice to vector for assert_eq
fn vb(b: &'static [u8]) -> Vec<u8> {
/// if the format changes, you can use this to help create the test for color
/// just pass it in and copy-paste (validating that it looks right first of course...)
fn debug_bytes(result: &[u8], expected: &[u8]) {
// sleep for a bit so stderr passes us
thread::sleep(time::Duration::new(0, 2e8 as u32));
println!("Debug Result:");
for b in result {
print!("{}", *b as char);
println!("Repr Result:");
println!("--Result Repr DONE");
println!("Debug Expected:");
for b in expected {
print!("{}", *b as char);
println!("Repr Expected:");
println!("--Expected Repr DONE");
/// for helping debugging what the actual bytes are
/// for writing user tests
fn repr_bytes(bytes: &[u8]) {
for b in bytes {
match *b {
// 9 => print!("{}", *b as char), // TAB
b'\n' => print!("\\n"),
b'\r' => print!("\\r"),
32...126 => print!("{}", *b as char), // visible ASCII
_ => print!(r"\x{:0>2x}", b),
fn test_display() {
let text1 = "Roses are red, violets are blue,\n\
I wrote this library,\n\
just for you.\n\
(It's true).";
let text2 = "Roses are red, violets are blue,\n\
I wrote this documentation,\n\
just for you.\n\
(It's quite true).";
let expected = b"Roses are red, violets are blue,\n\x1b[91mI wrote this library,\x1b\
[0m\n\x1b[92mI wrote this documentation,\x1b[0m\njust for you.\n\x1b\
[91m(It's true).\x1b[0m\n\x1b[92m(It's quite true).\x1b[0m\n";
let ch = Changeset::new(text1, text2, "\n");
let mut result: Vec<u8> = Vec::new();
write!(result, "{}", ch).unwrap();
debug_bytes(&result, expected);
assert_eq!(result, vb(expected));