Add unit test coverage gate; coverage-html make path

.github/workflows/pre-main.yml

@@ -24,3 +24,19 @@ jobs:
 
       - name: Run Tests
         run: make generate-golang-schema build tests
+
+      - name: Quality Gate - Test coverage shall be above threshold
+        env:
+          TESTCOVERAGE_THRESHOLD: 60
+        run: |
+          echo "Quality Gate: checking test coverage is above threshold ..."
+          echo "Threshold             : $TESTCOVERAGE_THRESHOLD %"
+          totalCoverage=`go tool cover -func=cover.out | grep total | grep -Eo '[0-9]+\.[0-9]+'`
+          echo "Current test coverage : $totalCoverage %"
+          if (( $(echo "$totalCoverage $TESTCOVERAGE_THRESHOLD" | awk '{print ($1 > $2)}') )); then
+              echo "OK"
+          else
+              echo "Current test coverage is below threshold. Please add more unit tests or adjust threshold to a lower value."
+              echo "Failed"
+              exit 1
+          fi

Makefile

@@ -6,6 +6,7 @@ GO_PACKAGES=$(shell go list ./... | grep -v vendor)
         generate-golang-schema \
         lint \
         tests \
+        coverage-html \
         vet
 
 all: generate-golang-schema fmt lint build tests
@@ -26,6 +27,9 @@ lint:
 tests:
 	go test -coverprofile=cover.out ./...
 
+coverage-html: tests
+	go tool cover -html cover.out
+
 validate-example:
 	jsonschema -i schemas/claim.example.json schemas/claim.schema.json