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facade.go
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facade.go
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package tenuki
import (
"io"
"net/http"
"strings"
"sync"
"testing"
"time"
"github.com/podhmo/tenuki/capture"
)
type Facade struct {
T *testing.T
*Config
Client *http.Client
extractor *ExtractFacade
mu sync.Mutex
}
func New(t *testing.T, options ...func(*Config)) *Facade {
f := &Facade{
T: t,
Config: DefaultConfig(append([]func(*Config){func(c *Config) {
c.disableCount = true
}}, options...)...),
}
if f.Client == nil {
f.Client = &http.Client{Timeout: 1 * time.Second}
}
return f
}
func (f *Facade) NewRequest(
method, url string, body io.Reader,
) *http.Request {
f.T.Helper()
if !strings.Contains(url, "://") {
url = "http://example.net/" + strings.TrimPrefix(url, "/")
}
req, err := http.NewRequest(method, url, body)
if err != nil {
f.T.Fatalf("!! NewRequest: %+v", err)
}
return req
}
func (f *Facade) NewJSONRequest(
method, url string, body io.Reader,
) *http.Request {
f.T.Helper()
req := f.NewRequest(method, url, body)
req.Header.Add("Content-Type", "application/json")
return req
}
func (f *Facade) Do(
req *http.Request,
options ...AssertOption,
) *http.Response {
t := f.T
t.Helper()
a := NewAssertion()
for _, opt := range options {
opt(a)
}
client := f.Client
if client == http.DefaultClient {
panic("!! invalid: http.DefaultClient is used")
}
// TODO: not goroutine safe
originalTransport := client.Transport
if f.captureEnabled {
ct := NewCaptureTransport(t, client.Transport)
client.Transport = ct
// for logf output (but this code is not good)
if transport, ok := ct.Transport.(*capture.ConsoleTransport); ok {
transport.Printer = ct
}
}
defer func() {
f.Client.Transport = originalTransport
}()
res, err := client.Do(req)
if err != nil {
if a.ExpectError == nil {
t.Fatalf("!! Do: %+v", err)
} else if err := a.ExpectError(err); err != nil {
t.Fatalf("!! Do, ExpectError: %+v", err)
}
} else {
if a.ExpectError != nil {
t.Fatalf("!! Do, ExpectError: fatal is expected, but nil")
}
}
for _, check := range a.Checks {
check(t, res)
}
return res
}
func (f *Facade) DoHandler(
handler http.Handler,
req *http.Request,
options ...AssertOption,
) *http.Response {
client := f.Client
if client == http.DefaultClient {
panic("!! invalid: http.DefaultClient is used")
}
originalTransport := f.Client.Transport
f.Client.Transport = &HandlerTripper{Handler: handler}
res := f.Do(req, options...)
f.Client.Transport = originalTransport
return res
}
func (f *Facade) DoHandlerFunc(
handler http.HandlerFunc,
req *http.Request,
options ...AssertOption,
) *http.Response {
return f.DoHandler(handler, req, options...)
}
type Assertion struct {
StatusCode int
Checks []func(t *testing.T, res *http.Response)
ExpectError func(err error) error
}
func AssertStatus(code int) AssertOption {
return func(a *Assertion) {
a.StatusCode = code
a.Checks = append(a.Checks, func(t *testing.T, res *http.Response) {
t.Helper()
if a.StatusCode != res.StatusCode {
t.Errorf("status code:\nwant\n\t%+v\nbut\n\t%+v", a.StatusCode, res.StatusCode)
}
})
}
}
func AssertError(handler func(err error) error) AssertOption {
return func(a *Assertion) {
a.ExpectError = handler
}
}
func NewAssertion() *Assertion {
return &Assertion{}
}
type AssertOption func(*Assertion)