Use upstream cov-mark

crates/test_utils/src/lib.rs

@@ -6,8 +6,6 @@
 //! * Extracting markup (mainly, `$0` markers) out of fixture strings.
 //! * marks (see the eponymous module).
 
-#[macro_use]
-pub mod mark;
 pub mod bench_fixture;
 mod fixture;
 

crates/test_utils/src/mark.rs

@@ -1,78 +0,0 @@
-//! This module implements manually tracked test coverage, which is useful for
-//! quickly finding a test responsible for testing a particular bit of code.
-//!
-//! See <https://matklad.github.io/2018/06/18/a-trick-for-test-maintenance.html>
-//! for details, but the TL;DR is that you write your test as
-//!
-//! ```
-//! #[test]
-//! fn test_foo() {
-//!     mark::check!(test_foo);
-//! }
-//! ```
-//!
-//! and in the code under test you write
-//!
-//! ```
-//! # use test_utils::mark;
-//! # fn some_condition() -> bool { true }
-//! fn foo() {
-//!     if some_condition() {
-//!         mark::hit!(test_foo);
-//!     }
-//! }
-//! ```
-//!
-//! This module then checks that executing the test indeed covers the specified
-//! function. This is useful if you come back to the `foo` function ten years
-//! later and wonder where the test are: now you can grep for `test_foo`.
-use std::sync::atomic::{AtomicUsize, Ordering};
-
-#[macro_export]
-macro_rules! _hit {
-    ($ident:ident) => {{
-        #[cfg(test)]
-        {
-            extern "C" {
-                #[no_mangle]
-                static $ident: std::sync::atomic::AtomicUsize;
-            }
-            unsafe {
-                $ident.fetch_add(1, std::sync::atomic::Ordering::SeqCst);
-            }
-        }
-    }};
-}
-pub use _hit as hit;
-
-#[macro_export]
-macro_rules! _check {
-    ($ident:ident) => {
-        #[no_mangle]
-        static $ident: std::sync::atomic::AtomicUsize = std::sync::atomic::AtomicUsize::new(0);
-        let _checker = $crate::mark::MarkChecker::new(&$ident);
-    };
-}
-pub use _check as check;
-
-pub struct MarkChecker {
-    mark: &'static AtomicUsize,
-    value_on_entry: usize,
-}
-
-impl MarkChecker {
-    pub fn new(mark: &'static AtomicUsize) -> MarkChecker {
-        let value_on_entry = mark.load(Ordering::Relaxed);
-        MarkChecker { mark, value_on_entry }
-    }
-}
-
-impl Drop for MarkChecker {
-    fn drop(&mut self) {
-        if std::thread::panicking() {
-            return;
-        }
-        let value_on_exit = self.mark.load(Ordering::Relaxed);
-        assert!(value_on_exit > self.value_on_entry, "mark was not hit")
-    }
-}