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feat(coprocessor): add cargo-llvm-cov code coverage to Rust CI workflows #2086

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feat(coprocessor): add cargo-llvm-cov code coverage to Rust CI workflows #2086

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82905b0
feat(ci): add llvm-cov in ci
PanGan21 Mar 10, 2026
10ae4e8
feat(ci): set coverage threshold to 60
PanGan21 Mar 10, 2026
af7a1fd
fix(common): remove coverage thresholds, use opt level 1, apply cover…
PanGan21 Mar 10, 2026
2fdb594
fix(coprocessor): lint workflow
PanGan21 Mar 10, 2026
4ea96e1
fix(ci): capture cargo-llvm-cov report output by redirecting stderr
PanGan21 Mar 10, 2026
38dc077
fix(ci): fix warning
PanGan21 Mar 11, 2026
3996258
Merge branch 'main' into panos/add-coverage-tool
PanGan21 Mar 11, 2026
b610ebf
fix(ci): handle failed generated report
PanGan21 Mar 11, 2026
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45 changes: 40 additions & 5 deletions .github/workflows/coprocessor-cargo-tests.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -53,7 +53,13 @@ jobs:
- name: Setup Rust
uses: dtolnay/rust-toolchain@a54c7afa936fefeb4456b2dd8068152669aa8203
with:
toolchain: stable
toolchain: "1.91.1"
components: llvm-tools-preview

- name: Install cargo-llvm-cov
uses: taiki-e/install-action@a37010ded18ff788be4440302bd6830b1ae50d8b # v2.68.25
with:
tool: cargo-llvm-cov

- name: Install cargo dependencies
run: |
Expand All @@ -71,8 +77,8 @@ jobs:
~/.cargo/registry
~/.cargo/git
target
key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
restore-keys: ${{ runner.os }}-cargo-
key: ${{ runner.os }}-cargo-coverage-${{ hashFiles('**/Cargo.lock') }}
restore-keys: ${{ runner.os }}-cargo-coverage-

- name: Login to GitHub Container Registry
uses: docker/login-action@9780b0c442fbb1117ed29e0efdff1e18412f7567 # v3.3.0
Expand Down Expand Up @@ -101,7 +107,36 @@ jobs:
run: |
docker run --rm -d -p 4566:4566 --name localstack localstack/localstack:latest

- name: Run tests
- name: Clean previous coverage data
run: cargo llvm-cov clean --workspace --profile coverage
working-directory: coprocessor/fhevm-engine

- name: Run tests with coverage
run: |
DATABASE_URL=postgresql://postgres:postgres@localhost:5432/coprocessor \
TEST_GLOBAL_LOCALSTACK=1 \
cargo llvm-cov --no-report --workspace --profile coverage -- --test-threads=1
working-directory: coprocessor/fhevm-engine

- name: Generate coverage report
if: always()
run: |
DATABASE_URL=postgresql://postgres:postgres@localhost:5432/coprocessor TEST_GLOBAL_LOCALSTACK=1 cargo test --release -- --test-threads=1
if cargo llvm-cov report --profile coverage > /tmp/cov-report.txt 2>&1; then
REPORT=$(cat /tmp/cov-report.txt)
else
echo "cargo llvm-cov report failed:"
cat /tmp/cov-report.txt
REPORT=""
fi
{
echo '## Coverage: coprocessor/fhevm-engine'
if [ -n "$REPORT" ]; then
echo '```'
echo "$REPORT"
echo '```'
else
echo '*No coverage data available (tests may have failed before producing profiling data).*'
fi
} >> "$GITHUB_STEP_SUMMARY"
echo "$REPORT"
working-directory: coprocessor/fhevm-engine
7 changes: 7 additions & 0 deletions coprocessor/fhevm-engine/Cargo.toml
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Expand Up @@ -111,3 +111,10 @@ inherits = "release"
opt-level = 1
lto = false
codegen-units = 16

[profile.coverage]
inherits = "release"
opt-level = 1
lto = false
debug = 1
codegen-units = 16
1 change: 1 addition & 0 deletions coprocessor/fhevm-engine/rust-toolchain.toml
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Original file line number Diff line number Diff line change
@@ -1,2 +1,3 @@
[toolchain]
channel = "1.91.1"
components = ["llvm-tools-preview"]
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