test: skip coverage of the test code itself

Author: dr-orlovsky

.github/workflows/codecov.yml

@@ -27,9 +27,9 @@ jobs:
       - uses: taiki-e/install-action@nextest
       - name: Collect coverage data (including doctests)
         run: |
-          cargo +nightly llvm-cov --no-report nextest --workspace --all-features
-          cargo +nightly llvm-cov --no-report --doc --workspace --all-features
-          cargo +nightly llvm-cov report --doctests --lcov --output-path lcov.info
+          RUSTFLAGS="--cfg=coverage_nightly" cargo +nightly llvm-cov --no-report nextest --workspace --all-features
+          RUSTFLAGS="--cfg=coverage_nightly" cargo +nightly llvm-cov --no-report --doc --workspace --all-features
+          RUSTFLAGS="--cfg=coverage_nightly" cargo +nightly llvm-cov report --doctests --lcov --output-path lcov.info
       - name: Upload coverage data to codecov
         uses: codecov/codecov-action@v4
         with:

Cargo.toml

@@ -61,3 +61,6 @@ serde = ["dep:serde", "commit_verify/serde"]
 
 [package.metadata.docs.rs]
 features = ["all"]
+
+[lints.rust]
+unexpected_cfgs = { level = "allow", check-cfg = ['cfg(coverage_nightly)'] }

commit_verify/Cargo.toml

@@ -53,3 +53,6 @@ wasm-bindgen-test = "0.3"
 
 [package.metadata.docs.rs]
 features = ["all"]
+
+[lints.rust]
+unexpected_cfgs = { level = "allow", check-cfg = ['cfg(coverage_nightly)'] }

commit_verify/src/commit.rs

@@ -84,6 +84,8 @@ where Self: Eq + Sized
 /// Helpers for writing test functions working with commit-verify scheme
 #[cfg(test)]
 pub(crate) mod test_helpers {
+    #![cfg_attr(coverage_nightly, coverage(off))]
+
     use core::fmt::Debug;
     use core::hash::Hash;
     use std::collections::HashSet;

commit_verify/src/embed.rs

@@ -197,6 +197,7 @@ where
 #[cfg(test)]
 pub(crate) mod test_helpers {
     #![allow(missing_docs)]
+    #![cfg_attr(coverage_nightly, coverage(off))]
 
     use core::fmt::Debug;
     use core::hash::Hash;
@@ -305,6 +306,8 @@ pub(crate) mod test_helpers {
 
 #[cfg(test)]
 mod test {
+    #![cfg_attr(coverage_nightly, coverage(off))]
+
     use core::fmt::Debug;
 
     use amplify::confinement::{SmallBlob, SmallVec, U32};

commit_verify/src/lib.rs

@@ -194,6 +194,8 @@ mod _reserved {
 /// Helpers for writing test functions working with commit schemes
 #[cfg(test)]
 pub mod test_helpers {
+    #![cfg_attr(coverage_nightly, coverage(off))]
+
     use amplify::confinement::SmallVec;
     use amplify::hex::FromHex;
 

commit_verify/src/mpc/block.rs

@@ -765,6 +765,8 @@ impl MerkleProof {
 
 #[cfg(test)]
 mod test {
+    #![cfg_attr(coverage_nightly, coverage(off))]
+
     use super::*;
     use crate::mpc::tree::test_helpers::{
         make_det_messages, make_random_messages, make_random_tree,

commit_verify/src/mpc/test.rs

@@ -1,5 +1,7 @@
 #[cfg(test)]
 mod test {
+    #![cfg_attr(coverage_nightly, coverage(off))]
+
     use std::str::FromStr;
 
     use super::*;

commit_verify/src/mpc/tree.rs

@@ -225,6 +225,8 @@ impl MerkleTree {
 
 #[cfg(test)]
 pub(crate) mod test_helpers {
+    #![cfg_attr(coverage_nightly, coverage(off))]
+
     use std::collections::BTreeMap;
 
     use amplify::confinement::Confined;
@@ -275,6 +277,8 @@ pub(crate) mod test_helpers {
 
 #[cfg(test)]
 mod test {
+    #![cfg_attr(coverage_nightly, coverage(off))]
+
     use std::collections::BTreeSet;
 
     use amplify::num::u5;

commit_verify/src/stl.rs

@@ -90,6 +90,8 @@ pub fn commit_verify_stl() -> TypeLib {
 
 #[cfg(test)]
 mod test {
+    #![cfg_attr(coverage_nightly, coverage(off))]
+
     use super::*;
 
     #[test]