put test commands into a Makefile (#58)

Makefile

@@ -0,0 +1,12 @@
+.DEFAULT_GOAL := test
+
+test: ## Start tests
+	@go test -coverprofile=/tmp/byteslice-cover .
+
+bench: ## Start benchmark
+	@go test -bench=. .
+
+help: ## Print this message
+	@grep -E '^[a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) | awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-20s\033[0m %s\n", $$1, $$2}'
+
+.PHONY: bench help test

README.adoc

@@ -5,19 +5,21 @@ image:https://coveralls.io/repos/github/rlespinasse/byteslice/badge.svg?branch=m
 
 == How to
 
+Run `make help` to see the available commands.
+
 === test it with coverage
 
 [source,shell]
 -----
-$ go test -coverprofile=/tmp/byteslice-cover .
+$ make test
 ok  	github.com/rlespinasse/byteslice	0.007s	coverage: 100.0% of statements
 -----
 
 === launch the benchmark
 
 [source,shell]
 -----
-$ go test -bench=. .
+$ make bench
 goos: ...
 goarch: ...
 pkg: github.com/rlespinasse/byteslice