Add tests to CI

.github/workflows/tests.yaml

@@ -0,0 +1,38 @@
+on:
+  pull_request:
+  push:
+    branches:
+      - main
+
+
+name: Tests
+
+jobs:
+  test_linux:
+    name: Test on Linux
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+          override: true
+      - uses: actions-rs/cargo@v1
+        with:
+          command: test
+
+  test_macost:
+    name: Test on MacOS
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+          overrideo: true
+          target: x86_64-apple-darwin
+      - uses: actions-rs/cargo@v1
+        with:
+          command: test