Merge pull request #40 from JesseStimpson/ci

CI: mix test on Linux, macOS

.github/workflows/ci.yml

@@ -0,0 +1,49 @@
+name: Test
+on:
+  push:
+    branches: [main]
+  pull_request:
+jobs:
+  linux:
+    runs-on: ubuntu-latest
+    name: Linux ${{ matrix.elixir }}, ${{ matrix.otp }}
+    strategy:
+      matrix:
+        elixir: ["1.17.3"]
+        otp: ["27.1.2"]
+    env:
+      MIX_ENV: test
+    steps:
+      - uses: actions/checkout@v2
+      - uses: erlef/setup-beam@v1
+        with:
+          otp-version: ${{ matrix.otp }}
+          elixir-version: ${{ matrix.elixir }}
+      - name: Install dependencies
+        run: mix deps.get
+      - name: Compile and check warnings
+        run: mix compile --warnings-as-errors
+      - name: Check formatting
+        run: mix format --check-formatted
+      - name: Run tests
+        run: mix test
+
+  macos:
+    runs-on: macos-latest
+    name: macOS
+    env:
+      MIX_ENV: test
+    steps:
+      - uses: actions/checkout@v2
+      - name: Install
+        run: |
+          brew update
+          brew install erlang@27 elixir
+      - name: Install dependencies
+        run: mix deps.get
+      - name: Compile and check warnings
+        run: mix compile --warnings-as-errors
+      - name: Check formatting
+        run: mix format --check-formatted
+      - name: Run tests
+        run: mix test