Add code coverage

Author: aperezg

.gitignore

@@ -1 +1,4 @@
-bin
+bin
+coverage.txt
+profile.out
+coverage.out

.travis.yml

@@ -13,5 +13,4 @@ matrix:
   fast_finish: true
 
 script:
-  - go test
-  - go test --race
+  - make test-coverage

Makefile

@@ -1,7 +1,32 @@
+# general
+WORKDIR = $(PWD)
+
 # build CLI
 LOCAL_TAG := $(shell git describe --tags --abbrev=0)
 LOCAL_BUILD := $(shell date +"%m-%d-%Y_%H_%M_%S")
 LOCAL_LDFLAGS = -s -X main.version=$(LOCAL_TAG) -X main.build=$(LOCAL_BUILD)
 
+# coverage
+COVERAGE_REPORT = coverage.txt
+COVERAGE_PROFILE = profile.out
+COVERAGE_MODE = atomic
+
 build-cli:
-	go build -o bin/graphiql -ldflags "$(LOCAL_LDFLAGS)" cmd/graphiql/main.go
+	go build -o bin/graphiql -ldflags "$(LOCAL_LDFLAGS)" cmd/graphiql/main.go
+
+test:
+	go test -v ./...
+
+test-coverage:
+	@cd $(WORKDIR); \
+	echo "" > $(COVERAGE_REPORT); \
+	for dir in `find . -name "*.go" | grep -o '.*/' | sort | uniq`; do \
+		go test -v  -race $$dir -coverprofile=$(COVERAGE_PROFILE) -covermode=$(COVERAGE_MODE); \
+		if [ $$? != 0 ]; then \
+			exit 2; \
+		fi; \
+		if [ -f $(COVERAGE_PROFILE) ]; then \
+			cat $(COVERAGE_PROFILE) >> $(COVERAGE_REPORT); \
+			rm $(COVERAGE_PROFILE); \
+		fi; \
+	done; \

README.md

@@ -1,6 +1,7 @@
 # Golang GraphiQL
 [![GitHub version](https://badge.fury.io/gh/friendsofgo%2Fgraphiql.svg)](https://badge.fury.io/gh/friendsofgo%2Fgraphiql)
 [![Build Status](https://travis-ci.org/friendsofgo/graphiql.svg?branch=master)](https://travis-ci.org/friendsofgo/graphiql)
+[![codecov](https://codecov.io/gh/aperezg/graphiql/branch/master/graph/badge.svg)](https://codecov.io/gh/aperezg/graphiql)
 [![Go Report Card](https://goreportcard.com/badge/github.com/friendsofgo/graphiql)](https://goreportcard.com/report/github.com/friendsofgo/graphiql)
 [![CDNJS](https://img.shields.io/cdnjs/v/graphiql.svg)](https://cdnjs.com/libraries/graphiql)
 [![GoDoc](https://godoc.org/graphql.co/graphql?status.svg)](https://godoc.org/github.com/friendsofgo/graphiql)