test: Move style logic to libc-test source

This doesn't need to reside only within the test directory, so move it
to the library to make testing simpler.

Author: tgross35

libc-test/Cargo.toml

@@ -9,14 +9,14 @@ license = "MIT OR Apache-2.0"
 repository = "https://github.com/rust-lang/libc"
 
 [dependencies]
+annotate-snippets = { version = "0.11.5", features = ["testing-colors"] }
 cfg-if = "1.0.1"
 libc = { path = "..", version = "1.0.0-alpha.1", default-features = false }
+proc-macro2 = { version = "1.0.95", features = ["span-locations"] }
+syn = { version = "2.0.104", features = ["full", "visit"] }
 
 [dev-dependencies]
-syn = { version = "2.0.104", features = ["full", "visit"] }
-proc-macro2 = { version = "1.0.95", features = ["span-locations"] }
 glob = "0.3.2"
-annotate-snippets = { version = "0.11.5", features = ["testing-colors"] }
 
 [build-dependencies]
 cc = "1.2.29"
@@ -98,11 +98,6 @@ name = "style"
 path = "test/check_style.rs"
 harness = true
 
-[[test]]
-name = "style_tests"
-path = "test/style_tests.rs"
-harness = true
-
 # FIXME(msrv): These should be moved to the root Cargo.toml as `[workspace.lints.*]`
 #              once MSRV is above 1.64 and replaced with `[lints] workspace=true`
 

libc-test/src/lib.rs

@@ -0,0 +1 @@
+pub mod style;

libc-test/test/style/mod.rs renamed to libc-test/src/style.rs

@@ -37,6 +37,9 @@ use syn::spanned::Spanned;
 use syn::visit::{self, Visit};
 use syn::Token;
 
+#[cfg(test)]
+mod tests;
+
 const ALLOWED_REPEATED_MACROS: &[&str] = &["s", "s_no_extra_traits", "s_paren"];
 
 pub type Error = Box<dyn std::error::Error>;

libc-test/test/style_tests.rs renamed to libc-test/src/style/tests.rs

@@ -1,8 +1,6 @@
 //! Verifies the implementation of the style checker in [style].
 
-use style::StyleChecker;
-
-pub mod style;
+use super::StyleChecker;
 
 #[test]
 fn check_style_accept_correct_module_layout() {

libc-test/test/check_style.rs renamed to libc-test/test/style.rs

@@ -9,12 +9,10 @@
 //! cargo test --test style
 //! ```
 
-pub mod style;
-
 use std::env;
 use std::path::Path;
 
-use style::{Result, StyleChecker};
+use libc_test::style::{Result, StyleChecker};
 
 /// Relative to `src/`.
 const SKIP_PREFIXES: &[&str] = &[