From fe81a08b8767b53f2f1b35b8c2ab7f79794f5167 Mon Sep 17 00:00:00 2001
From: James Ding <git@twango.dev>
Date: Sun, 31 May 2026 00:36:54 -0700
Subject: [PATCH 1/4] ci: run tests with cargo-nextest

Replace `cargo test` with `cargo nextest run --profile ci` in the test
matrix and add a nextest `ci` profile that emits JUnit XML. nextest is
installed in CI via taiki-e/install-action, matching how cargo-llvm-cov
and cargo-hack are already provisioned.
---
 .config/nextest.toml       | 3 +++
 .github/workflows/rust.yml | 3 ++-
 2 files changed, 5 insertions(+), 1 deletion(-)
 create mode 100644 .config/nextest.toml

diff --git a/.config/nextest.toml b/.config/nextest.toml
new file mode 100644
index 0000000..f40c8e3
--- /dev/null
+++ b/.config/nextest.toml
@@ -0,0 +1,3 @@
+# JUnit output for Codecov Test Analytics (used by the `ci` profile in CI).
+[profile.ci.junit]
+path = "junit.xml"
diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index cb19460..93c93a9 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -56,7 +56,8 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - uses: actions-rust-lang/setup-rust-toolchain@v1
-      - run: cargo test
+      - uses: taiki-e/install-action@nextest
+      - run: cargo nextest run --profile ci
 
   coverage:
     name: Coverage

From d1ffb1b2c9dbb87f4382ccf705e99bfe7b8ce096 Mon Sep 17 00:00:00 2001
From: James Ding <git@twango.dev>
Date: Sun, 31 May 2026 00:37:04 -0700
Subject: [PATCH 2/4] ci: upload test results to Codecov Test Analytics

Add a codecov/test-results-action@v1 step that uploads the JUnit report
from the nextest `ci` profile. Gated to ubuntu-latest so the three-OS
matrix produces a single upload per run, and runs on failure
(`!cancelled()`) so failing tests are still reported.
---
 .github/workflows/rust.yml | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index 93c93a9..706d54b 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -58,6 +58,12 @@ jobs:
       - uses: actions-rust-lang/setup-rust-toolchain@v1
       - uses: taiki-e/install-action@nextest
       - run: cargo nextest run --profile ci
+      - name: Upload test results to Codecov
+        if: ${{ !cancelled() && matrix.os == 'ubuntu-latest' }}
+        uses: codecov/test-results-action@v1
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          files: target/nextest/ci/junit.xml
 
   coverage:
     name: Coverage

From 58586b16100a2cd0bb03745f881797c98b648d24 Mon Sep 17 00:00:00 2001
From: James Ding <git@twango.dev>
Date: Sun, 31 May 2026 00:40:14 -0700
Subject: [PATCH 3/4] ci: use codecov-action@v5 for test results

codecov/test-results-action is deprecated; switch to codecov-action@v5
with report_type: test_results, matching the coverage job's action and
token style.
---
 .github/workflows/rust.yml | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index 706d54b..0474d2c 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -60,10 +60,12 @@ jobs:
       - run: cargo nextest run --profile ci
       - name: Upload test results to Codecov
         if: ${{ !cancelled() && matrix.os == 'ubuntu-latest' }}
-        uses: codecov/test-results-action@v1
+        uses: codecov/codecov-action@v5
         with:
-          token: ${{ secrets.CODECOV_TOKEN }}
+          report_type: test_results
           files: target/nextest/ci/junit.xml
+        env:
+          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
 
   coverage:
     name: Coverage

From 6733c6da0124b73ad1c39279c00ecc2303003dd2 Mon Sep 17 00:00:00 2001
From: James Ding <git@twango.dev>
Date: Sun, 31 May 2026 00:50:06 -0700
Subject: [PATCH 4/4] ci: drop CODECOV_TOKEN from test results upload

Public repo uploads are tokenless via GitHub Actions OIDC.
---
 .github/workflows/rust.yml | 2 --
 1 file changed, 2 deletions(-)

diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index 0474d2c..6a0b1b2 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -64,8 +64,6 @@ jobs:
         with:
           report_type: test_results
           files: target/nextest/ci/junit.xml
-        env:
-          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
 
   coverage:
     name: Coverage