feat: add first test

README.md

 # learn-go
+
+## 安装 Go
+
+```bash
+brew install go
+```
+
+配置环境 
+
+```bash
+export GOROOT=/usr/local/opt/go/libexec
+export GOPATH=$HOME/.go
+export PATH=$PATH:$GOROOT/bin:$GOPATH/bin
+```
+
+### 安装 Go 依赖管理工具：godep
+
+```
+brew install dep
+```
+
+TBD.

imp/imp.go

 package imp
 
-import "fmt"
-
-func Count(x uint64) int {
-	fmt.Println("count")
-	return int(1)
+func Add(x uint64, y uint64) uint64 {
+	return x + y
 }

imp/imp_test.go

+package imp_test
+
+import (
+	. "./"
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+)
+
+var _ = Describe("Add", func() {
+	Context("Basic", func() {
+		It("should return correct result", func() {
+			Expect(Add(1, 2)).Should(Equal(3))
+		})
+	})
+})
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