test: github workflows

.github/workflows/ci.yml

@@ -0,0 +1,20 @@
+name: Tests
+on:
+  push:
+  pull_request:
+    branches: [master]
+permissions:
+  contents: read
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Download source
+        uses: actions/checkout@v4
+      - name: Install Crystal
+        uses: crystal-lang/install-crystal@v1
+      - name: Run tests
+        run: |
+          shards install
+          crystal tool format --check
+          crystal spec -v

.github/workflows/coverage.yml

@@ -0,0 +1,26 @@
+name: Coverage
+on:
+  workflow_dispatch:
+  schedule:
+    - cron: "0 1 * * *"
+permissions:
+  contents: read
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Download source
+        uses: actions/checkout@v4
+      - name: Install Crystal
+        uses: crystal-lang/install-crystal@v1
+      - name: Run tests using kcov
+        run: |
+          sudo apt update && sudo apt install kcov
+          shards install
+          crystal build src/run_tests.cr
+          kcov --clean --include-path=./src coverage ./run_tests
+          curl -Os https://uploader.codecov.io/latest/linux/codecov
+          chmod +x codecov
+          ./codecov -t ${CODECOV_TOKEN} -s coverage
+        env:
+          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}

.github/workflows/mutation.yml

@@ -0,0 +1,20 @@
+name: Mutation Tests
+on:
+  workflow_dispatch:
+  schedule:
+    - cron: "0 0 * * *"
+
+permissions:
+  contents: read
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Download source
+        uses: actions/checkout@v3
+      - name: Install Crystal
+        uses: crystal-lang/install-crystal@v1
+      - name: Run tests
+        run: |
+          shards install
+          bin/crytic test -s src/hace.cr