local_unit_test.yml

name: "Local Unit Test"

on:
  push:
  pull_request:

jobs:

  Local-Unit-Test:
    runs-on: ubuntu-18.04
    timeout-minutes: 15

    steps:
      - name: Install coverage tools
        run: sudo apt-get install lcov -y

      - name: Checkout submodule
        uses: actions/checkout@v2

      - name: Set up for build
        run: |
          cp Makefile.sample Makefile
          make ENABLE_UNIT_TESTS=true PERMISSIVE_MODE=true prep

      - name: Build the code
        run: make -j

      # Baseline lcov and run all tests
      - name: Test
        run: make test

      - name: Calculate coverage 
        run: make lcov | tee lcov_out.txt
 
      - name: Confirm 100% line coverage
        run: |
          if [[ `grep -A 3 "Overall coverage rate" lcov_out.txt | grep lines` != *"100.0%"* ]]; then
            grep -A 3 "Overall coverage rate" lcov_out.txt
            echo "Lacks 100.0% line unit test coverage"
            exit -1
          fi

      - name: Confirm absolute line coverage
        run: |
          # Current best possible branch coverage is all but 4, with associated issues for each missing case
          missed_branches=4
          coverage_nums=$(grep -A 3 "Overall coverage rate" lcov_out.txt | grep branches | grep -oP "[0-9]+[0-9]*")

          diff=$(echo $coverage_nums | awk '{ print $4 - $3 }')
          if [ $diff -gt $missed_branches ]
          then 
            grep -A 3 "Overall coverage rate" lcov_out.txt
            echo "More than $missed_branches branches missed"
            exit -1
          fi