From: Duncan Dean <git@dunxen.dev>
Date: Thu, 30 Nov 2023 11:31:24 +0000 (+0200)
Subject: Introduce basic incremental mutation testing
X-Git-Tag: v0.0.124-beta~65^2
X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=commitdiff_plain;h=c42699d1af7d3b4ef15743dfb6bc5bec878fc2eb;p=rust-lightning

Introduce basic incremental mutation testing

We introduce a CI job for mutation testing of PR diffs using cargo-mutants.
Missed cases do not trigger a fail of this job yet as we just introduce it
now for visibility. We may start enforcing stricter rules at a later stage.
---

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 1a7c7f85c..90ecd4431 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -247,3 +247,19 @@ jobs:
           rustup component add rustfmt
       - name: Run rustfmt checks
         run: ci/rustfmt.sh
+
+  incremental-mutants:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+      - name: Relative diff
+        run: |
+          git branch -av
+          git diff origin/main.. | tee git.diff
+      - uses: Swatinem/rust-cache@v2
+      - name: Mutants
+        run: |
+          cargo install cargo-mutants
+          cargo mutants --no-shuffle -j 2 -vV --in-diff git.diff