tests.yml

name: Tests

on:
  push:
    branches: [main]
  pull_request:
    branches: [main]

jobs:
  coverage:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2

      - name: Set up Go
        uses: actions/setup-go@v2
        with:
          go-version: 1.20.5

      - id: last_coverage
        name: Get last coverage
        run: |
          echo "COV=$(go tool cover -func=coverage.out | tail -1 | awk '{ print $3 }' | sed s/%//g)" >> "$GITHUB_OUTPUT"

      - id: this_coverage
        name: Get current coverage
        run: |
          go test -coverprofile=coverage.out
          echo "COV=$(go tool cover -func=coverage.out | tail -1 | awk '{ print $3 }' | sed s/%//g)" >> "$GITHUB_OUTPUT"

      - name: Function Coverage
        run: go tool cover -func=coverage.out

      - id: coverage_dropped
        name: Check if coverage dropped
        run: |
          cov_drop=$(echo ${{steps.last_coverage.outputs.COV}}'>'${{steps.this_coverage.outputs.COV}} | bc -l)
          echo "Has it dropped? $cov_drop"
          echo "DROP=$cov_drop" >> "$GITHUB_OUTPUT"

      - name: If coverage has dropped
        if: ${{ steps.coverage_dropped.outputs.DROP == '1' }}
        run: |
          echo "Coverage has dropped from ${{ steps.last_coverage.outputs.COV }}% to ${{ steps.this_coverage.outputs.COV }}%"
          exit 1

      - name: If coverage has not dropped
        if: ${{ steps.coverage_dropped.outputs.DROP == '0' }}
        run: |
          echo -e "Previous coverage: ${{ steps.last_coverage.outputs.COV }}\nCurrent coverage: ${{ steps.this_coverage.outputs.COV }}"

      - name: Get coverage badge
        run: |
          total=${{ steps.this_coverage.outputs.COV }}
          curl "https://img.shields.io/badge/coverage-$total%25-green" > coverage.svg

      - name: Add coverage info
        uses: EndBug/add-and-commit@v7.5.0
        with:
          add: "coverage.svg coverage.out"
          message: "Update coverage.svg and coverage.out"