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Use insta::glob instead of fixture macro (#5364)

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Micha Reiser 2023-06-26 10:46:18 +02:00 • committed by GitHub
parent dce6a046b0
commit 8879927b9a
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82 changed files with 285 additions and 765 deletions
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177
crates/ruff_python_formatter/src/lib.rs
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@ -263,18 +263,12 @@ impl TryFrom<char> for QuoteStyle {
#[cfg(test)]
mod tests {
use crate::{format_module, format_node};
use anyhow::Result;
use insta::assert_snapshot;
use ruff_python_ast::source_code::CommentRangesBuilder;
use ruff_testing_macros::fixture;
use rustpython_parser::lexer::lex;
use rustpython_parser::{parse_tokens, Mode};
use similar::TextDiff;
use std::fmt::{Formatter, Write};
use std::fs;
use std::path::Path;
use crate::{format_module, format_node};
/// Very basic test intentionally kept very similar to the CLI
#[test]
@ -295,138 +289,6 @@ if True:
Ok(())
}
#[fixture(pattern = "resources/test/fixtures/black/**/*.py")]
#[test]
fn black_test(input_path: &Path) -> Result<()> {
let content = fs::read_to_string(input_path)?;
let printed = format_module(&content)?;
let expected_path = input_path.with_extension("py.expect");
let expected_output = fs::read_to_string(&expected_path)
.unwrap_or_else(|_| panic!("Expected Black output file '{expected_path:?}' to exist"));
let formatted_code = printed.as_code();
ensure_stability_when_formatting_twice(formatted_code);
if formatted_code == expected_output {
// Black and Ruff formatting matches. Delete any existing snapshot files because the Black output
// already perfectly captures the expected output.
// The following code mimics insta's logic generating the snapshot name for a test.
let workspace_path = std::env::var("CARGO_MANIFEST_DIR").unwrap();
let snapshot_name = insta::_function_name!()
.strip_prefix(&format!("{}::", module_path!()))
.unwrap();
let module_path = module_path!().replace("::", "__");
let snapshot_path = Path::new(&workspace_path)
.join("src/snapshots")
.join(format!(
"{module_path}__{}.snap",
snapshot_name.replace(&['/', '\\'][..], "__")
));
if snapshot_path.exists() && snapshot_path.is_file() {
// SAFETY: This is a convenience feature. That's why we don't want to abort
// when deleting a no longer needed snapshot fails.
fs::remove_file(&snapshot_path).ok();
}
let new_snapshot_path = snapshot_path.with_extension("snap.new");
if new_snapshot_path.exists() && new_snapshot_path.is_file() {
// SAFETY: This is a convenience feature. That's why we don't want to abort
// when deleting a no longer needed snapshot fails.
fs::remove_file(&new_snapshot_path).ok();
}
} else {
// Black and Ruff have different formatting. Write out a snapshot that covers the differences
// today.
let mut snapshot = String::new();
write!(snapshot, "{}", Header::new("Input"))?;
write!(snapshot, "{}", CodeFrame::new("py", &content))?;
write!(snapshot, "{}", Header::new("Black Differences"))?;
let diff = TextDiff::from_lines(expected_output.as_str(), formatted_code)
.unified_diff()
.header("Black", "Ruff")
.to_string();
write!(snapshot, "{}", CodeFrame::new("diff", &diff))?;
write!(snapshot, "{}", Header::new("Ruff Output"))?;
write!(snapshot, "{}", CodeFrame::new("py", formatted_code))?;
write!(snapshot, "{}", Header::new("Black Output"))?;
write!(snapshot, "{}", CodeFrame::new("py", &expected_output))?;
insta::with_settings!({ omit_expression => false, input_file => input_path }, {
insta::assert_snapshot!(snapshot);
});
}
Ok(())
}
#[fixture(pattern = "resources/test/fixtures/ruff/**/*.py")]
#[test]
fn ruff_test(input_path: &Path) -> Result<()> {
let content = fs::read_to_string(input_path)?;
let printed = format_module(&content)?;
let formatted_code = printed.as_code();
ensure_stability_when_formatting_twice(formatted_code);
let snapshot = format!(
r#"## Input
{}
## Output
{}"#,
CodeFrame::new("py", &content),
CodeFrame::new("py", formatted_code)
);
assert_snapshot!(snapshot);
Ok(())
}
/// Format another time and make sure that there are no changes anymore
fn ensure_stability_when_formatting_twice(formatted_code: &str) {
let reformatted = match format_module(formatted_code) {
Ok(reformatted) => reformatted,
Err(err) => {
panic!(
"Expected formatted code to be valid syntax: {err}:\
\n---\n{formatted_code}---\n",
);
}
};
if reformatted.as_code() != formatted_code {
let diff = TextDiff::from_lines(formatted_code, reformatted.as_code())
.unified_diff()
.header("Formatted once", "Formatted twice")
.to_string();
panic!(
r#"Reformatting the formatted code a second time resulted in formatting changes.
---
{diff}---
Formatted once:
---
{formatted_code}---
Formatted twice:
---
{}---"#,
reformatted.as_code()
);
}
}
/// Use this test to debug the formatting of some snipped
#[ignore]
#[test]
@ -549,41 +411,4 @@ if [
assert_snapshot!(output.print().expect("Printing to succeed").as_code());
}
struct Header<'a> {
title: &'a str,
}
impl<'a> Header<'a> {
fn new(title: &'a str) -> Self {
Self { title }
}
}
impl std::fmt::Display for Header<'_> {
fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
writeln!(f, "## {}", self.title)?;
writeln!(f)
}
}
struct CodeFrame<'a> {
language: &'a str,
code: &'a str,
}
impl<'a> CodeFrame<'a> {
fn new(language: &'a str, code: &'a str) -> Self {
Self { language, code }
}
}
impl std::fmt::Display for CodeFrame<'_> {
fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
writeln!(f, "```{}", self.language)?;
write!(f, "{}", self.code)?;
writeln!(f, "```")?;
writeln!(f)
}
}
}