chore(ci): add test and coverage jobs

.github/workflows/go.yml

@@ -21,5 +21,46 @@ jobs:
     - name: Build
       run: go build -v ./...
 
+  test:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Set up Go
+      uses: actions/setup-go@v2
+      with:
+        go-version: 1.16
+
+    - name: Build
+      run: go build -v ./...
+
+    - name: Test
+      run: go test -v ./...
+
+  coverage:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Set up Go
+      uses: actions/setup-go@v2
+      with:
+        go-version: 1.16
+
+    - name: Build
+      run: go build -v ./...
+
     - name: Test
       run: go test -v ./...
+
+    - name: Generate coverage report
+      run: |
+        go test `go list ./... | grep -v examples` -coverprofile=coverage.txt -covermode=atomic
+
+    - name: Upload coverage report
+      uses: codecov/codecov-action@v1.0.2
+      with:
+        token: 50ed170f-08b5-4484-97d8-37771615ae42
+        file: ./coverage.txt
+        flags: unittests
+        name: codecov-umbrella