Add a hacky mechanism for allowing string adjustments in tests (#9)

It's nice to be able to track tests that are "almost" passing, modulo string normalization, so this PR adds a dedicated section for snippets that fit that description.

crates/ruff_fmt/Cargo.toml

@@ -6,11 +6,13 @@ edition = "2021"
 [dependencies]
 anyhow = "1.0.68"
 clap = { version = "4.0.1", features = ["derive"] }
-insta = { version = "1.19.1", features = ["yaml"] }
 once_cell = "1.17.0"
 rome_formatter = { path = "../../../tools/crates/rome_formatter" }
 rome_text_size = { path = "../../../tools/crates/rome_text_size" }
 rustc-hash = "1.1.0"
 rustpython-common = { workspace = true }
 rustpython-parser = { workspace = true }
+
+[dev-dependencies]
+insta = { version = "1.19.0", features = [] }
 test-case = { version = "2.2.2" }

crates/ruff_fmt/src/lib.rs

@@ -78,8 +78,22 @@ mod tests {
  Ok(())
  }
 
- // Passing modulo string normalization.
- // #[test_case(Path::new("simple_cases/collections.py"); "collections")]
+ #[test_case(Path::new("simple_cases/collections.py"); "collections")]
+ fn passing_modulo_string_normalization(path: &Path) -> Result<()> {
+ fn adjust_quotes(contents: &str) -> String {
+ // Replace all single quotes with double quotes.
+ contents.replace("'", "\"")
+ }
+
+ let snapshot = format!("{}", path.display());
+ let content = std::fs::read_to_string(test_resource_path(
+ Path::new("fixtures/black").join(path).as_path(),
+ ))?;
+ let formatted = fmt(&content)?;
+ insta::assert_display_snapshot!(snapshot, adjust_quotes(formatted.print()?.as_code()));
+ Ok(())
+ }
+
  // Passing apart from one deviation in RHS tuple assignment.
  // #[test_case(Path::new("simple_cases/tupleassign.py"); "tupleassign")]
  // Lots of deviations, _mostly_ related to string normalization and wrapping.