CI: add unit-tests

.github/workflows/unit-tests.yml

@@ -0,0 +1,31 @@
+name: unit-tests
+
+on:
+  pull_request: ~
+  push: ~
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: checkout
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - name: set up go
+        uses: actions/setup-go@v2
+        with:
+          go-version: 1.22
+
+      - name: cache go modules
+        uses: actions/cache@v1
+        with:
+          path: ~/go/pkg/mod
+          key: "${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}"
+          restore-keys: |
+            ${{ runner.os }}-go-
+
+      - name: tests
+        run: |
+          go test -v ./...