Add tests coverage visibility

Author: joaopaulovieira

Makefile

@@ -1,7 +1,13 @@
 PACKAGES ?= "$(shell go list ./... | grep -v tests)"
 
 test:
-	@go test -race $(shell echo $(PACKAGES))
+	@go test ./... -coverprofile=coverage.out.tmp
+	cat coverage.out.tmp | grep -v "/mocks/" > coverage.out
+	@go tool cover -func=coverage.out
+
+local-coverage: test
+	@go tool cover -html=coverage.out -o coverage.html
+	@echo "\n\n open the coverage.html on your browser !!!"
 
 lint:
 	@golangci-lint run