test version command

.travis.yml

@@ -0,0 +1,3 @@
+language: go
+go:
+  - 1.3

README.md

@@ -1,4 +1,5 @@
 ## forego
+[![Build Status](https://travis-ci.org/dickeyxxx/forego.svg)](https://travis-ci.org/dickeyxxx/forego)
 
 Foreman in Go.
 

util.go

@@ -0,0 +1,13 @@
+package main
+
+import (
+	"fmt"
+	"io"
+	"os"
+)
+
+var stdout io.Writer = os.Stdout
+
+func Println(a ...interface{}) (n int, err error) {
+	return fmt.Fprintln(stdout, a...)
+}

version.go

@@ -1,9 +1,5 @@
 package main
 
-import (
-	"fmt"
-)
-
 var Version = "dev"
 
 var cmdVersion = &Command{
@@ -19,9 +15,6 @@ Examples:
 `,
 }
 
-func init() {
-}
-
 func runVersion(cmd *Command, args []string) {
-	fmt.Println(Version)
+	Println(Version)
 }

version_test.go

@@ -0,0 +1,20 @@
+package main
+
+import (
+	"bytes"
+	"testing"
+)
+
+func TestVersion(t *testing.T) {
+	var b bytes.Buffer
+	stdout = &b
+	cmdVersion.Run(cmdVersion, []string{})
+	output := b.String()
+	assertEqual(t, output, "dev\n")
+}
+
+func assertEqual(t *testing.T, a, b interface{}) {
+	if a != b {
+		t.Fatalf(`Expected %#v to equal %#v`, a, b)
+	}
+}