feat: retain allow attribute in test_case macro (#127)

crates/test-case-macros/src/lib.rs

@@ -72,7 +72,12 @@ fn render_test_cases(test_cases: &[(TestCase, Span2)], mut item: ItemFn) -> Toke
  let mod_name = item.sig.ident.clone();
 
  // We don't want any external crate to alter main fn code, we are passing attributes to each sub-function anyway
- item.attrs.clear();
+ item.attrs.retain(|attr| {
+ attr.path
+ .get_ident()
+ .map(|ident| ident == "allow")
+ .unwrap_or(false)
+ });
 
  let output = quote! {
  #[allow(unused_attributes)]

tests/acceptance_cases/allow_stays_on_fn/Cargo.toml

@@ -0,0 +1,14 @@
+[package]
+name = "allow_stays_on_fn"
+version = "0.1.0"
+edition = "2021"
+
+[lib]
+name = "allow_stays_on_fn"
+path = "src/lib.rs"
+doctest = false
+
+[dependencies]
+test-case = { path = "../../../" }
+
+[workspace]

tests/acceptance_cases/allow_stays_on_fn/src/lib.rs

@@ -0,0 +1,7 @@
+#![deny(unused_variables)]
+
+use test_case::test_case;
+
+#[test_case(42)]
+#[allow(unused_variables)]
+fn allow_stays_on_fn(value: u32) {}

tests/acceptance_tests.rs

@@ -142,3 +142,8 @@ fn cases_can_use_regex() {
 fn features_produce_human_readable_errors() {
  run_acceptance_test!("features_produce_human_readable_errors")
 }
+
+#[test]
+fn allow_stays_on_fn() {
+ run_acceptance_test!("allow_stays_on_fn")
+}

tests/snapshots/rust-nightly/acceptance__allow_stays_on_fn.snap

@@ -0,0 +1,7 @@
+---
+source: tests/acceptance_tests.rs
+expression: output
+---
+running 1 test
+test allow_stays_on_fn::_42_expects ... ok
+test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s

tests/snapshots/rust-stable/acceptance__allow_stays_on_fn.snap

@@ -0,0 +1,7 @@
+---
+source: tests/acceptance_tests.rs
+expression: output
+---
+running 1 test
+test allow_stays_on_fn::_42_expects ... ok
+test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s