Merge branch 'master' into patch-1

README.md

@@ -1344,6 +1344,52 @@ func main() {
 }
 ```
 
+## Testing
+
+The `net/http/httptest` package is preferable way for HTTP testing.
+
+```go
+package main
+
+func setupRouter() *gin.Engine {
+	r := gin.Default()
+	r.GET("/ping", func(c *gin.Context) {
+		c.String(200, "pong")
+	})
+	return r
+}
+
+func main() {
+	r := setupRouter()
+	r.Run(":8080")
+}
+```
+
+Test for code example above:
+
+```go
+package main
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestPingRoute(t *testing.T) {
+	router := setupRouter()
+
+	w := httptest.NewRecorder()
+	req, _ := http.NewRequest("GET", "/ping", nil)
+	router.ServeHTTP(w, req)
+
+	assert.Equal(t, 200, w.Code)
+	assert.Equal(t, "pong", w.Body.String())
+}
+```
+
 ## Users  [![Sourcegraph](https://sourcegraph.com/github.com/gin-gonic/gin/-/badge.svg)](https://sourcegraph.com/github.com/gin-gonic/gin?badge)
 
 Awesome project lists using [Gin](https://github.com/gin-gonic/gin) web framework.

context.go

@@ -33,9 +33,7 @@ const (
 	MIMEMultipartPOSTForm = binding.MIMEMultipartPOSTForm
 )
 
-const (
-	abortIndex int8 = math.MaxInt8 / 2
-)
+const abortIndex int8 = math.MaxInt8 / 2
 
 // Context is the most important part of gin. It allows us to pass variables between middleware,
 // manage the flow, validate the JSON of a request and render a JSON response for example.
@@ -105,8 +103,7 @@ func (c *Context) Handler() HandlerFunc {
 // See example in GitHub.
 func (c *Context) Next() {
 	c.index++
-	s := int8(len(c.handlers))
-	for ; c.index < s; c.index++ {
+	for s := int8(len(c.handlers)); c.index < s; c.index++ {
 		c.handlers[c.index](c)
 	}
 }
@@ -521,11 +518,11 @@ func (c *Context) ClientIP() string {
 			clientIP = clientIP[0:index]
 		}
 		clientIP = strings.TrimSpace(clientIP)
-		if len(clientIP) > 0 {
+		if clientIP != "" {
 			return clientIP
 		}
 		clientIP = strings.TrimSpace(c.requestHeader("X-Real-Ip"))
-		if len(clientIP) > 0 {
+		if clientIP != "" {
 			return clientIP
 		}
 	}
@@ -588,7 +585,7 @@ func (c *Context) Status(code int) {
 // It writes a header in the response.
 // If value == "", this method removes the header `c.Writer.Header().Del(key)`
 func (c *Context) Header(key, value string) {
-	if len(value) == 0 {
+	if value == "" {
 		c.Writer.Header().Del(key)
 	} else {
 		c.Writer.Header().Set(key, value)

examples/basic/main.go

@@ -6,7 +6,7 @@ import (
 
 var DB = make(map[string]string)
 
-func main() {
+func setupRouter() *gin.Engine {
 	// Disable Console Color
 	// gin.DisableConsoleColor()
 	r := gin.Default()
@@ -53,6 +53,11 @@ func main() {
 		}
 	})
 
+	return r
+}
+
+func main() {
+	r := setupRouter()
 	// Listen and Server in 0.0.0.0:8080
 	r.Run(":8080")
 }

examples/basic/main_test.go

@@ -0,0 +1,20 @@
+package main
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestPingRoute(t *testing.T) {
+	router := setupRouter()
+
+	w := httptest.NewRecorder()
+	req, _ := http.NewRequest("GET", "/ping", nil)
+	router.ServeHTTP(w, req)
+
+	assert.Equal(t, 200, w.Code)
+	assert.Equal(t, "pong", w.Body.String())
+}

gin.go

@@ -403,8 +403,8 @@ func redirectTrailingSlash(c *Context) {
 		code = 307
 	}
 
-	if len(path) > 1 && path[len(path)-1] == '/' {
-		req.URL.Path = path[:len(path)-1]
+	if length := len(path); length > 1 && path[length-1] == '/' {
+		req.URL.Path = path[:length-1]
 	} else {
 		req.URL.Path = path + "/"
 	}

json/json.go

@@ -6,9 +6,7 @@
 
 package json
 
-import (
-	"encoding/json"
-)
+import "encoding/json"
 
 var (
 	Marshal       = json.Marshal

json/jsoniter.go

@@ -6,9 +6,7 @@
 
 package json
 
-import (
-	"github.com/json-iterator/go"
-)
+import "github.com/json-iterator/go"
 
 var (
 	json          = jsoniter.ConfigCompatibleWithStandardLibrary