Create tests.yml

.github/workflows/tests.yml

@@ -0,0 +1,52 @@
+name: 'Tests'
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.number }}-${{ github.event.ref }}
+  cancel-in-progress: true
+on:  # yamllint disable-line rule:truthy
+  push:
+    branches: ["master", "maint/*"]
+  pull_request:
+    branches: ["master", "maint/*"]
+
+permissions:
+  contents: read
+
+jobs:
+  pytest:
+    name: '${{ matrix.os }} / ${{ matrix.python }}'
+    timeout-minutes: 70
+    runs-on: ${{ matrix.os }}
+    defaults:
+      run:
+        shell: bash -el {0}
+    env:
+      MNE_HCP_N_RUNS: '3'
+      SUBJECTS_DIR: '${{ github.workspace }}/subjects'
+      MNE_LOGGING_LEVEL: warning
+    strategy:
+      matrix:
+        include:
+          - os: ubuntu-latest
+            python: '3.8'  # TODO: Bump to 3.12
+          # - os: macos-latest  # arm64 (Apple Silicon)
+          #   python: '3.12'
+          #   kind: mamba
+          # - os: macos-13  # latest Intel release
+          #   python: '3.12'
+          #   kind: mamba
+          # - os: windows-latest
+          #   python: '3.12'
+          # - os: ubuntu-20.04
+          #   python: '3.8'
+      fail-fast: false
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python }}
+      - uses: pyvista/setup-headless-display-action@main
+        with:
+          qt: true
+          pyvista: false