Create deno.yml

deno.yml

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+# This workflow uses actions that are not certified by GitHub.
+# They are provided by a third-party and are governed by
+# separate terms of service, privacy policy, and support
+# documentation.
+
+# This workflow will install Deno and run tests across stable and nightly builds on Windows, Ubuntu and macOS.
+# For more information see: https://github.com/denolib/setup-deno
+
+name: Fetch
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+    branches: [master]
+
+jobs:
+  test:
+    runs-on: ${{ matrix.os }} # runs a test on Ubuntu, Windows and macOS
+
+    strategy:
+      matrix:
+        deno: ["v1.x", "nightly"]
+        os: [macOS-latest, windows-latest, ubuntu-latest]
+
+    steps:
+      - name: Setup repo
+        uses: actions/checkout@v2
+
+      - name: Setup Deno
+        uses: denolib/setup-deno@c7d7968ad4a59c159a777f79adddad6872ee8d96
+        with:
+          deno-version: ${{ matrix.deno }} # tests across multiple Deno versions
+
+      - name: Cache Dependencies
+        run: deno cache deps.ts
+
+      - name: Run Tests
+        run: deno test -A --unstable