Add test coverage GH action

.github/.testcoverage.yaml

@@ -0,0 +1,64 @@
+# Copyright 2024 The Nephio Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# (mandatory) 
+# Path to coverprofile file (output of `go test -coverprofile` command).
+#
+# For cases where there are many coverage profiles, such as when running 
+# unit tests and integration tests separately, you can combine all those
+# profiles into one. In this case, the profile should have a comma-separated list 
+# of profile files, e.g., 'cover_unit.out,cover_integration.out'.
+profile: lcov.info
+
+# (optional; but recommended to set) 
+# When specified reported file paths will not contain local prefix in the output
+local-prefix: "github.com/nephio-project/porch"
+
+# Holds coverage thresholds percentages, values should be in range [0-100]
+threshold:
+  # (optional; default 0) 
+  # The minimum coverage that each file should have
+  file: 0
+
+  # (optional; default 0) 
+  # The minimum coverage that each package should have
+  package: 0
+
+  # (optional; default 0) 
+  # The minimum total coverage project should have
+  total: 40
+
+# Holds regexp rules which will override thresholds for matched files or packages 
+# using their paths.
+#
+# First rule from this list that matches file or package is going to apply 
+# new threshold to it. If project has multiple rules that match same path, 
+# override rules should be listed in order from specific to more general rules.
+override:
+  # # Increase coverage threshold to 100% for `foo` package 
+  # # (default is 80, as configured above in this example)
+  # - threshold: 100
+  #   path: ^pkg/lib/foo$
+
+# Holds regexp rules which will exclude matched files or packages 
+# from coverage statistics
+exclude:
+  # # Exclude files or packages matching their paths
+  # paths:
+  #   - \.pb\.go$    # excludes all protobuf generated files
+  #   - ^pkg/bar     # exclude package `pkg/bar`
+
+# NOTES:
+# - symbol `/` in all path regexps will be replaced by current OS file path separator
+#   to properly work on Windows

.github/workflows/porch-go-covergae.yaml

@@ -0,0 +1,60 @@
+# Copyright 2024 The Nephio Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+name: "Go test coverage"
+on:
+  push:
+    paths-ignore:
+      - "build/**"
+      - "deployments/**"
+      - "docs/**"
+      - "examples/**"
+      - "release/**"
+      - "scripts/**"
+  pull_request:
+    paths-ignore:
+      - "build/**"
+      - "deployments/**"
+      - "docs/**"
+      - "examples/**"
+      - "release/**"
+      - "scripts/**"
+
+permissions:
+  contents: write
+  pull-requests: write
+  repository-projects: write
+
+jobs:
+  coverage:
+    name: Go test coverage check
+    runs-on: ubuntu-latest
+    steps:
+      - name: checkout repo
+        uses: actions/checkout@v4
+
+      - name: setup go
+        uses: actions/setup-go@v5
+        with:
+          go-version: '1.22.2'
+
+      - name: generate test coverage
+        run: make test
+
+      - name: check test coverage
+        uses: vladopajic/go-test-coverage@v2
+        with:
+          # Configure action using config file (option 1)
+          config: ./.github/.testcoverage.yaml
+          git-branch: badges
+          git-token: ${{ secrets.GITHUB_TOKEN }}

README.md

@@ -1,5 +1,7 @@
 # Package Orchestration Server
 
+[![coverage](https://raw.githubusercontent.com/nephio-project/porch/badges/.badges/main/coverage.svg)](/.github/.testcoverage.yaml)
+
 Package Orchestration Server (a.k.a. Porch) is a k8s extension apiserver
 which manages the lifecycle of KRM configuration packages.
 

default-go-test.mk

@@ -1,4 +1,4 @@
-#  Copyright 2023 The Nephio Authors.
+#  Copyright 2023-2024 The Nephio Authors.
 #
 #  Licensed under the Apache License, Version 2.0 (the "License");
 #  you may not use this file except in compliance with the License.
@@ -14,6 +14,7 @@
 
 GO_VERSION ?= 1.22.2
 TEST_COVERAGE_FILE=lcov.info
+TEST_COVERAGE_TMP_FILE=lcov.tmp.info
 TEST_COVERAGE_HTML_FILE=coverage_unit.html
 TEST_COVERAGE_FUNC_FILE=func_coverage.out
 GIT_ROOT_DIR ?= $(dir $(lastword $(MAKEFILE_LIST)))
@@ -26,13 +27,15 @@ unit: test
 test: ## Run unit tests (go test)
 ifeq ($(CONTAINER_RUNNABLE), 0)
 		$(RUN_CONTAINER_COMMAND) docker.io/nephio/gotests:1782782171367346176 \
-         sh -e -c "git config --global --add user.name test; \
-	 git config --global --add user.email [email protected]; \
-	 go test ./... -v -coverprofile ${TEST_COVERAGE_FILE}; \
-         go tool cover -html=${TEST_COVERAGE_FILE} -o ${TEST_COVERAGE_HTML_FILE}; \
-         go tool cover -func=${TEST_COVERAGE_FILE} -o ${TEST_COVERAGE_FUNC_FILE}"
+        sh -e -c "git config --global --add user.name test; \
+	 	git config --global --add user.email [email protected]; \
+	 	go test ./... -v -covermode=atomic -coverpkg=./... -coverprofile ${TEST_COVERAGE_TMP_FILE}; \
+		cat ${TEST_COVERAGE_TMP_FILE} | grep -v 'test\|api' > ${TEST_COVERAGE_FILE}; \
+        go tool cover -html=${TEST_COVERAGE_FILE} -o ${TEST_COVERAGE_HTML_FILE}; \
+        go tool cover -func=${TEST_COVERAGE_FILE} -o ${TEST_COVERAGE_FUNC_FILE}"
 else
-		go test ./... -v -coverprofile ${TEST_COVERAGE_FILE}
+		go test ./... -v -covermode=atomic -coverpkg=./... -coverprofile ${TEST_COVERAGE_TMP_FILE}; \
+		cat ${TEST_COVERAGE_TMP_FILE} | grep -v 'test\|api' > ${TEST_COVERAGE_FILE}; \
 		go tool cover -html=${TEST_COVERAGE_FILE} -o ${TEST_COVERAGE_HTML_FILE}
 		go tool cover -func=${TEST_COVERAGE_FILE} -o ${TEST_COVERAGE_FUNC_FILE}
 endif
@@ -42,4 +45,4 @@ unit-clean: ## Clean up the artifacts created by the unit tests
 ifeq ($(CONTAINER_RUNNABLE), 0)
 		$(CONTAINER_RUNTIME) system prune -f
 endif
-		rm -f ${TEST_COVERAGE_FILE} ${TEST_COVERAGE_HTML_FILE} ${TEST_COVERAGE_FUNC_FILE} > /dev/null 2>&1
+		rm -f ${TEST_COVERAGE_TMP_FILE} ${TEST_COVERAGE_FILE} ${TEST_COVERAGE_HTML_FILE} ${TEST_COVERAGE_FUNC_FILE} > /dev/null 2>&1