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recovery_test.go
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recovery_test.go
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package negroni
import (
"bytes"
"fmt"
"log"
"net/http"
"net/http/httptest"
"strings"
"testing"
)
func TestRecovery(t *testing.T) {
buff := bytes.NewBufferString("")
recorder := httptest.NewRecorder()
panicHandlerCalled := false
handlerCalled := false
rec := NewRecovery()
rec.Logger = log.New(buff, "[negroni] ", 0)
rec.ErrorHandlerFunc = func(i interface{}) {
handlerCalled = true
}
rec.PanicHandlerFunc = func(i *PanicInformation) {
panicHandlerCalled = (i != nil)
}
n := New()
// replace log for testing
n.Use(rec)
n.UseHandler(http.HandlerFunc(func(res http.ResponseWriter, req *http.Request) {
panic("here is a panic!")
}))
n.ServeHTTP(recorder, (*http.Request)(nil))
expect(t, recorder.Header().Get("Content-Type"), "text/plain; charset=utf-8")
expect(t, recorder.Code, http.StatusInternalServerError)
expect(t, panicHandlerCalled, true)
expect(t, handlerCalled, true)
refute(t, recorder.Body.Len(), 0)
refute(t, len(buff.String()), 0)
}
func TestRecovery_noContentTypeOverwrite(t *testing.T) {
recorder := httptest.NewRecorder()
rec := NewRecovery()
rec.Logger = log.New(bytes.NewBuffer([]byte{}), "[negroni] ", 0)
n := New()
n.Use(rec)
n.UseHandler(http.HandlerFunc(func(res http.ResponseWriter, req *http.Request) {
res.Header().Set("Content-Type", "application/javascript; charset=utf-8")
panic("here is a panic!")
}))
n.ServeHTTP(recorder, (*http.Request)(nil))
expect(t, recorder.Header().Get("Content-Type"), "application/javascript; charset=utf-8")
}
func TestRecovery_callbackPanic(t *testing.T) {
buff := bytes.NewBufferString("")
recorder := httptest.NewRecorder()
rec := NewRecovery()
rec.Logger = log.New(buff, "[negroni] ", 0)
rec.ErrorHandlerFunc = func(i interface{}) {
panic("callback panic")
}
n := New()
n.Use(rec)
n.UseHandler(http.HandlerFunc(func(res http.ResponseWriter, req *http.Request) {
panic("here is a panic!")
}))
n.ServeHTTP(recorder, (*http.Request)(nil))
expect(t, strings.Contains(buff.String(), "callback panic"), true)
}
func TestRecovery_handlerPanic(t *testing.T) {
buff := bytes.NewBufferString("")
recorder := httptest.NewRecorder()
rec := NewRecovery()
rec.Logger = log.New(buff, "[negroni] ", 0)
rec.PanicHandlerFunc = func(i *PanicInformation) {
panic("panic handler panic")
}
n := New()
n.Use(rec)
n.UseHandler(http.HandlerFunc(func(res http.ResponseWriter, req *http.Request) {
panic("here is a panic!")
}))
n.ServeHTTP(recorder, (*http.Request)(nil))
expect(t, strings.Contains(buff.String(), "panic handler panic"), true)
}
type testOutput struct {
*bytes.Buffer
}
func newTestOutput() *testOutput {
buf := bytes.NewBufferString("")
return &testOutput{buf}
}
func (t *testOutput) FormatPanicError(rw http.ResponseWriter, r *http.Request, infos *PanicInformation) {
fmt.Fprintf(t, formatInfos(infos))
}
func formatInfos(infos *PanicInformation) string {
return fmt.Sprintf("%s %s", infos.RequestDescription(), infos.RecoveredPanic)
}
func TestRecovery_formatter(t *testing.T) {
recorder := httptest.NewRecorder()
formatter := newTestOutput()
req, _ := http.NewRequest("GET", "http://localhost:3003/somePath?element=true", nil)
var element interface{} = "here is a panic!"
expectedInfos := &PanicInformation{RecoveredPanic: element, Request: req}
rec := NewRecovery()
rec.Formatter = formatter
n := New()
n.Use(rec)
n.UseHandler(http.HandlerFunc(func(res http.ResponseWriter, req *http.Request) {
panic(element)
}))
n.ServeHTTP(recorder, req)
expect(t, formatInfos(expectedInfos), formatter.String())
}
func TestRecovery_PanicInformation(t *testing.T) {
// Request with query
req, _ := http.NewRequest("GET", "http://localhost:3003/somePath?element=true", nil)
var element interface{} = "here is a panic!"
expectedInfos := &PanicInformation{RecoveredPanic: element, Request: req}
expect(t, expectedInfos.RequestDescription(), "GET /somePath?element=true")
// Request without Query
req, _ = http.NewRequest("POST", "http://localhost:3003/somePath", nil)
element = "here is a panic!"
expectedInfos = &PanicInformation{RecoveredPanic: element, Request: req}
expect(t, expectedInfos.RequestDescription(), "POST /somePath")
// Nil request
expectedInfos = &PanicInformation{RecoveredPanic: element, Request: nil}
expect(t, expectedInfos.RequestDescription(), nilRequestMessage)
// Stack
stackValue := "Some Stack element"
expectedInfos = &PanicInformation{RecoveredPanic: element, Request: req, Stack: []byte(stackValue)}
expect(t, expectedInfos.StackAsString(), stackValue)
}
func TestRecovery_HTMLFormatter(t *testing.T) {
recorder := httptest.NewRecorder()
rec := NewRecovery()
rec.Formatter = &HTMLPanicFormatter{}
n := New()
n.Use(rec)
n.UseHandler(http.HandlerFunc(func(res http.ResponseWriter, req *http.Request) {
panic("some panic")
}))
n.ServeHTTP(recorder, (*http.Request)(nil))
expect(t, recorder.Header().Get("Content-Type"), "text/html; charset=utf-8")
refute(t, recorder.Body.Len(), 0)
}