Add coverage from codecov (#376)

.gitignore

@@ -5,4 +5,5 @@ nohup.out
 build_config.mk
 var*
 *.log
-bin
+bin
+coverage.out

.travis.yml

@@ -6,3 +6,4 @@ go:
 script:
   - make vet
   - make test
+  - bash <(curl -s https://codecov.io/bash)

Makefile

@@ -26,7 +26,7 @@ vet:
 	go vet -mod=vendor -tags '$(GO_BUILD_TAGS)' ./...
 
 test:
-	go test -mod=vendor --race -tags '$(GO_BUILD_TAGS)' -timeout 2m $$(go list ./... | grep -v -e /vendor/)
+	go test -mod=vendor --race -tags '$(GO_BUILD_TAGS)' -cover -coverprofile coverage.out -timeout 2m $$(go list ./... | grep -v -e /vendor/)
 
 clean:
 	go clean -i ./...

README.md

@@ -1,6 +1,8 @@
 # LedisDB 
 
-[![Build Status](https://travis-ci.org/ledisdb/ledisdb.svg?branch=develop)](https://travis-ci.org/ledisdb/ledisdb)
+[![Build Status](https://travis-ci.org/ledisdb/ledisdb.svg?branch=develop)](https://travis-ci.org/siddontang/ledisdb) 
+
+[![codecov](https://codecov.io/gh/ledisdb/ledisdb/branch/master/graph/badge.svg)](https://codecov.io/gh/ledisdb/ledisdb)
 
 Ledisdb is a high-performance NoSQL database, similar to Redis, written in [Go](http://golang.org/). It supports many data structures including kv, list, hash, zset, set.