Measure code coverage

.github/codecov.yml

@@ -0,0 +1,16 @@
+# ref: https://docs.codecov.com/docs/codecovyml-reference
+coverage:
+  range: 80..100
+  round: down
+  precision: 1
+  status:
+    # ref: https://docs.codecov.com/docs/commit-status
+    project:
+      default:
+        # Avoid false negatives
+        threshold: 1%
+
+ignore:
+  - "**/*_scale.go"
+  - "**/*mock*.go"
+  - "**/mocks/*.go"

.github/workflows/go.yml

@@ -1,8 +1,5 @@
 name: Go
 
-env:
-  go-version: "1.19"
-
 on:
   pull_request:
   push:
@@ -17,7 +14,8 @@ jobs:
       - name: set up go
         uses: actions/setup-go@v4
         with:
-          go-version: ${{ env.go-version }}
+          check-latest: true
+          go-version-file: "go.mod"
       - name: fmt, tidy
         run: |
           make install
@@ -35,7 +33,8 @@ jobs:
       - name: set up go
         uses: actions/setup-go@v4
         with:
-          go-version: ${{ env.go-version }}
+          check-latest: true
+          go-version-file: "go.mod"
       - name: setup env
         run: make install
       - name: lint
@@ -57,7 +56,8 @@ jobs:
       - name: set up go
         uses: actions/setup-go@v4
         with:
-          go-version: ${{ env.go-version }}
+          check-latest: true
+          go-version-file: "go.mod"
       - name: setup env
         run: make install
       - name: Clear test cache
@@ -74,3 +74,22 @@ jobs:
         with:
           report_paths: "**/unit-tests.xml"
           annotate_only: true
+
+  coverage:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: set up go
+        uses: actions/setup-go@v4
+        with:
+          check-latest: true
+          go-version-file: "go.mod"
+      - name: setup env
+        run: make install
+      - name: test coverage
+        run: make cover
+      - name: Upload to codecov.io
+        uses: codecov/codecov-action@v3
+        with:
+          fail_ci_if_error: true
+          token: ${{ secrets.CODECOV_TOKEN }}

Makefile

@@ -55,7 +55,7 @@ lint-github-action:
 .PHONY: lint-github-action
 
 cover:
-	go test -coverprofile=cover.out -timeout 0 -p 1 $(UNIT_TESTS)
+	go test -coverprofile=cover.out -timeout 0 -p 1 -coverpkg=./... $(UNIT_TESTS)
 .PHONY: cover
 
 staticcheck: