Added HelloWorld test

Author: paulbellamy

.gitignore

@@ -4,3 +4,4 @@
 *.8
 *.sw?
 _obj
+_test*

mango_test.go

@@ -1 +1,35 @@
-package main
+package mango
+
+import (
+	"http"
+	"io/ioutil"
+	"testing"
+	"./mango"
+)
+
+func helloWorld(env mango.Env) (mango.Status, mango.Headers, mango.Body) {
+	return 200, make(map[string]string), mango.Body("Hello World!")
+}
+
+func TestHelloWorld(t *testing.T) {
+	// Start up the server
+	stack := new(mango.Stack)
+	stack.Address = "localhost:3000"
+	go stack.Run(helloWorld)
+
+	// Request against it
+	client := new(http.Client)
+	response, _, err := client.Get("http://localhost:3000/")
+	if err != nil {
+		t.Error(err)
+	}
+
+	if response.StatusCode != 200 {
+		t.Error("Expected status to equal 200, got:", response.StatusCode)
+	}
+
+	body, _ := ioutil.ReadAll(response.Body)
+	if string(body) != "Hello World!" {
+		t.Error("Expected body:", body, "to equal: \"Hello World!\"")
+	}
+}