coveralls support

https://coveralls.io/github/tarantool/go-tarantool
https://github.com/mattn/goveralls
https://docs.coveralls.io/go

Author: ligurio

.github/workflows/testing.yml

@@ -44,3 +44,12 @@ jobs:
 
       - name: Run tests
         run: make test
+
+      - name: Run tests, collect code coverage data and send to Coveralls
+        if: ${{ matrix.tarantool }} == '2.9'
+        env:
+          COVERALLS_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          go get golang.org/x/tools/cmd/cover
+          go get github.com/mattn/goveralls
+          make coveralls

Makefile

@@ -1,4 +1,5 @@
 SHELL := /bin/bash
+COVERAGE_FILE := coverage.out
 
 .PHONY: clean
 clean:
@@ -12,3 +13,12 @@ deps: clean
 test:
 	go clean -testcache
 	go test ./... -v -p 1	
+
+.PHONY: coverage
+coverage:
+	go clean -testcache
+	go test ./... -v -p 1 -covermode=count -coverprofile=$(COVERAGE_FILE)
+
+.PHONY: coveralls
+coveralls: coverage
+	goveralls -coverprofile=$(COVERAGE_FILE) -service=github

README.md

@@ -4,6 +4,7 @@
 <!--a href="https://travis-ci.org/tarantool/go-tarantool">
 	<img src="https://travis-ci.org/tarantool/go-tarantool.png?branch=master" align="right">
 </a-->
+[![Coverage Status](https://coveralls.io/repos/github/tarantool/go-tarantool/badge.svg?branch=master)](https://coveralls.io/github/tarantool/go-tarantool?branch=master)
 
 # Client in Go for Tarantool 1.6+