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webtest.go
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webtest.go
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// Copyright 2019 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Package webtest provides helpers for testing web applications.
package webtest
import (
"io"
"io/ioutil"
"net"
"net/http"
"net/url"
"testing"
"time"
)
// W holds the configuration for a web test.
type W struct {
t *testing.T
host string
Client *http.Client
}
// New creates a web test for a given a host string (e.g. "localhost:8080")
func New(t *testing.T, host string) *W {
return &W{
t: t,
host: host,
Client: http.DefaultClient,
}
}
// WaitForNet waits for the host to come live.
// After a 30s timeout, it will call t.Fatal
func (w *W) WaitForNet() {
const retryDelay = 100 * time.Millisecond
deadline := time.Now().Add(30 * time.Second)
for time.Now().Before(deadline) {
conn, err := net.Dial("tcp", w.host)
if err != nil {
time.Sleep(retryDelay)
continue
}
conn.Close()
return
}
w.t.Fatalf("Timed out wating for net %s", w.host)
}
// GetBody performs a GET request to a given path.
func (w *W) GetBody(path string) (body string, resp *http.Response, err error) {
resp, err = w.Get(path)
if err != nil {
return "", resp, err
}
b, err := ioutil.ReadAll(resp.Body)
if err != nil {
return "", resp, err
}
return string(b), resp, err
}
// Get performs a GET request to a given path.
func (w *W) Get(path string) (*http.Response, error) {
return w.Client.Get("http://" + w.host + path)
}
// Post performs a POST request to a given path.
func (w *W) Post(path, bodyType string, body io.Reader) (*http.Response, error) {
return w.Client.Post("http://"+w.host+path, bodyType, body)
}
// PostForm performs a POST request to a given path.
func (w *W) PostForm(path string, v url.Values) (*http.Response, error) {
return w.Client.PostForm("http://"+w.host+path, v)
}
// NewRequest constructs a http.Request for the web tests's host.
func (w *W) NewRequest(method, path string, body io.Reader) *http.Request {
r, err := http.NewRequest(method, "http://"+w.host+path, body)
if err != nil {
w.t.Fatal(err)
}
return r
}