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Allow to bless diff tests

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This commit is contained in:
Guillaume Gomez 2024-06-11 14:05:30 +02:00
parent 921645c737
commit 9bff23005d
1 changed files with 13 additions and 1 deletions
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14
src/tools/run-make-support/src/diff/mod.rs
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@ -1,6 +1,6 @@
use regex::Regex;
use similar::TextDiff;
use std::path::Path;
use std::path::{Path, PathBuf};
use crate::drop_bomb::DropBomb;
@ -17,6 +17,7 @@ pub fn diff() -> Diff {
pub struct Diff {
expected: Option<String>,
expected_name: Option<String>,
expected_file: Option<PathBuf>,
actual: Option<String>,
actual_name: Option<String>,
normalizers: Vec<(String, String)>,
@ -30,6 +31,7 @@ impl Diff {
Self {
expected: None,
expected_name: None,
expected_file: None,
actual: None,
actual_name: None,
normalizers: Vec::new(),
@ -43,6 +45,7 @@ impl Diff {
let content = std::fs::read_to_string(path).expect("failed to read file");
let name = path.to_string_lossy().to_string();
self.expected_file = Some(path.into());
self.expected = Some(content);
self.expected_name = Some(name);
self
@ -104,6 +107,15 @@ impl Diff {
.to_string();
if !output.is_empty() {
// If we can bless (meaning we have a file to write into and the `RUSTC_BLESS_TEST`
// environment variable set), then we write into the file and return.
if let Some(ref expected_file) = self.expected_file {
if std::env::var("RUSTC_BLESS_TEST").is_ok() {
println!("Blessing `{}`", expected_file.display());
std::fs::write(expected_file, actual).unwrap();
return;
}
}
panic!(
"test failed: `{}` is different from `{}`\n\n{}",
expected_name, actual_name, output