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// Copyright 2020 New Relic Corporation. All rights reserved.
// SPDX-License-Identifier: Apache-2.0
package nrgorilla
import (
"net/http"
"net/http/httptest"
"testing"
"github.com/gorilla/mux"
newrelic "github.com/newrelic/go-agent"
"github.com/newrelic/go-agent/internal"
"github.com/newrelic/go-agent/internal/integrationsupport"
)
func makeHandler(text string) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.Write([]byte(text))
})
}
func TestBasicRoute(t *testing.T) {
app := integrationsupport.NewBasicTestApp()
r := mux.NewRouter()
r.Handle("/alpha", makeHandler("alpha response"))
InstrumentRoutes(r, app)
response := httptest.NewRecorder()
req, err := http.NewRequest("GET", "/alpha", nil)
if err != nil {
t.Fatal(err)
}
r.ServeHTTP(response, req)
if respBody := response.Body.String(); respBody != "alpha response" {
t.Error("wrong response body", respBody)
}
app.ExpectTxnMetrics(t, internal.WantTxn{
Name: "alpha",
IsWeb: true,
})
}
func TestSubrouterRoute(t *testing.T) {
app := integrationsupport.NewBasicTestApp()
r := mux.NewRouter()
users := r.PathPrefix("/users").Subrouter()
users.Handle("/add", makeHandler("adding user"))
InstrumentRoutes(r, app)
response := httptest.NewRecorder()
req, err := http.NewRequest("GET", "/users/add", nil)
if err != nil {
t.Fatal(err)
}
r.ServeHTTP(response, req)
if respBody := response.Body.String(); respBody != "adding user" {
t.Error("wrong response body", respBody)
}
app.ExpectTxnMetrics(t, internal.WantTxn{
Name: "users/add",
IsWeb: true,
})
}
func TestNamedRoute(t *testing.T) {
app := integrationsupport.NewBasicTestApp()
r := mux.NewRouter()
r.Handle("/named", makeHandler("named route")).Name("special-name-route")
InstrumentRoutes(r, app)
response := httptest.NewRecorder()
req, err := http.NewRequest("GET", "/named", nil)
if err != nil {
t.Fatal(err)
}
r.ServeHTTP(response, req)
if respBody := response.Body.String(); respBody != "named route" {
t.Error("wrong response body", respBody)
}
app.ExpectTxnMetrics(t, internal.WantTxn{
Name: "special-name-route",
IsWeb: true,
})
}
func TestRouteNotFound(t *testing.T) {
app := integrationsupport.NewBasicTestApp()
r := mux.NewRouter()
r.NotFoundHandler = http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(500)
w.Write([]byte("not found"))
})
// Tests that routes do not get double instrumented when
// InstrumentRoutes is called twice by expecting error metrics with a
// count of 1.
InstrumentRoutes(r, app)
InstrumentRoutes(r, app)
response := httptest.NewRecorder()
req, err := http.NewRequest("GET", "/foo", nil)
if err != nil {
t.Fatal(err)
}
r.ServeHTTP(response, req)
if respBody := response.Body.String(); respBody != "not found" {
t.Error("wrong response body", respBody)
}
if response.Code != 500 {
t.Error("wrong response code", response.Code)
}
// Error metrics test the 500 response code capture.
app.ExpectTxnMetrics(t, internal.WantTxn{
Name: "NotFoundHandler",
IsWeb: true,
NumErrors: 1,
})
}
func TestNilApp(t *testing.T) {
var app newrelic.Application
r := mux.NewRouter()
r.Handle("/alpha", makeHandler("alpha response"))
InstrumentRoutes(r, app)
response := httptest.NewRecorder()
req, err := http.NewRequest("GET", "/alpha", nil)
if err != nil {
t.Fatal(err)
}
r.ServeHTTP(response, req)
if respBody := response.Body.String(); respBody != "alpha response" {
t.Error("wrong response body", respBody)
}
}
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