rust-unit.yml

name: Rust Unit Tests

on:
  push:
    branches: [main]
    paths:
      - "crates/**"
      - "Cargo.*"
      - "justfile"
      - ".github/workflows/rust-unit.yml"
  pull_request:
    branches: [main]
    paths:
      - "crates/**"
      - "Cargo.*"
      - "justfile"
      - ".github/workflows/rust-unit.yml"

env:
  CARGO_TERM_COLOR: always
  RUST_LOG: info
  CI: true

jobs:
  test:
    name: Rust Unit Tests & Coverage
    runs-on: ubuntu-latest
    timeout-minutes: 15
    permissions:
      contents: read
      pull-requests: write
    steps:
      - uses: actions/checkout@v4
      - uses: dtolnay/rust-toolchain@stable
        with:
          components: rustfmt, clippy, llvm-tools-preview
      - uses: Swatinem/rust-cache@v2
      - name: Install just
        uses: extractions/setup-just@v3
      - name: Run fmt and clippy
        run: |
          cargo fmt --all -- --check
          cargo clippy -- -D warnings
      - name: Build
        run: just build

      - name: Setup Solana CLI
        uses: ./.github/actions/setup-solana

      - name: Install cargo-llvm-cov for coverage
        run: cargo install cargo-llvm-cov

      - name: Run unit tests with coverage
        env:
          JUPITER_API_KEY: ${{ secrets.JUPITER_API_KEY }}
        run: |
          echo "🧪 Running unit tests with coverage instrumentation..."
          cargo llvm-cov clean --workspace
          cargo llvm-cov test --no-report --workspace --lib

      - name: Generate coverage reports
        run: |
          echo "📊 Generating coverage reports..."
          mkdir -p coverage
          cargo llvm-cov report --lcov --output-path coverage/lcov.info

      - name: Display coverage summary
        run: |
          echo "📊 Coverage Summary:"
          if [ -f "coverage/lcov.info" ]; then
            echo "✅ Coverage report generated successfully"
            echo "📄 Generated: coverage/lcov.info"
          else
            echo "❌ Coverage report not found"
          fi

      - name: Upload coverage artifacts
        uses: actions/upload-artifact@v4
        with:
          name: rust-unit-coverage-report
          path: coverage/
          retention-days: 30

      - name: Update PR description with coverage badge
        if: github.event_name == 'pull_request' && github.event.pull_request.head.repo.full_name == github.repository
        uses: actions/github-script@v7
        with:
          script: |
            // Extract coverage percentage from lcov.info
            const fs = require('fs');
            let coverage = '0';

            try {
              const lcov = fs.readFileSync('coverage/lcov.info', 'utf8');
              const linesFound = lcov.match(/^LF:(\d+)$/gm)?.reduce((sum, line) => sum + parseInt(line.split(':')[1]), 0) || 0;
              const linesHit = lcov.match(/^LH:(\d+)$/gm)?.reduce((sum, line) => sum + parseInt(line.split(':')[1]), 0) || 0;
              coverage = linesFound > 0 ? ((linesHit / linesFound) * 100).toFixed(1) : '0';
            } catch (error) {
              console.log('Error reading coverage:', error);
            }

            // Determine badge color
            let color = 'red';
            if (parseFloat(coverage) >= 80) color = 'green';
            else if (parseFloat(coverage) >= 60) color = 'yellow';

            // Get current PR
            const { data: pr } = await github.rest.pulls.get({
              owner: context.repo.owner,
              repo: context.repo.repo,
              pull_number: context.issue.number,
            });

            // Create coverage badge section
            const coverageBadge = `![Coverage](https://img.shields.io/badge/coverage-${coverage}%25-${color})`;
            const coverageSection = `\n\n## 📊 Unit Test Coverage\n${coverageBadge}\n\n**Unit Test Coverage: ${coverage}%**\n\n[View Detailed Coverage Report](https://github.com/${context.repo.owner}/${context.repo.repo}/actions/runs/${context.runId})`;

            // Update PR body
            let newBody = pr.body || '';

            // Remove existing coverage section if present
            newBody = newBody.replace(/\n## 📊 Unit Test Coverage[\s\S]*?(?=\n## |\n$|$)/g, '');

            // Add new coverage section
            newBody += coverageSection;

            await github.rest.pulls.update({
              owner: context.repo.owner,
              repo: context.repo.repo,
              pull_number: context.issue.number,
              body: newBody
            });