Restore Github-CI

.github/workflows/test.yml

@@ -0,0 +1,35 @@
+name: YOCaml test-suite
+on: pull_request
+
+jobs:
+  build_opam:
+    name: opam build & run tests
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - macos-latest
+          - ubuntu-latest
+        ocaml-compiler:
+          - 5.1.x
+          - 5.2.x
+
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - name: Set git to use LF
+        run: |
+          git config --global core.autocrlf false
+          git config --global core.eol lf
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Use OCaml ${{ matrix.ocaml-compiler }}
+        uses: ocaml/setup-ocaml@v2
+        with:
+          ocaml-compiler: ${{ matrix.ocaml-compiler }}
+          opam-depext-flags: --with-test
+
+      - run: opam install . --deps-only --with-test
+      - run: opam exec -- dune build
+      - run: opam exec -- dune runtest