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internal_test.go
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internal_test.go
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package apachelog
import (
"bytes"
"fmt"
"io"
"io/ioutil"
"net/http"
"testing"
"time"
"github.com/lestrrat-go/apache-logformat/internal/httputil"
"github.com/lestrrat-go/apache-logformat/internal/logctx"
"github.com/stretchr/testify/assert"
"net/http/httptest"
)
func isDash(t *testing.T, s string) bool {
return assert.Equal(t, "-", s, "expected dash")
}
func isEmpty(t *testing.T, s string) bool {
return assert.Equal(t, "", s, "expected dash")
}
func TestInternalDashEmpty(t *testing.T) {
f := func(t *testing.T, name string, dash bool, f FormatWriter) {
var buf bytes.Buffer
r, _ := http.NewRequest(http.MethodGet, "http://example.com", nil)
r.Host = ""
r.Method = ""
r.Proto = ""
ctx := logctx.Get(r)
t.Run(fmt.Sprintf("%s (dash=%t)", name, dash), func(t *testing.T) {
if !assert.NoError(t, f.WriteTo(&buf, ctx), "callback should succeed") {
return
}
if dash {
isDash(t, buf.String())
} else {
isEmpty(t, buf.String())
}
})
}
type dashEmptyCase struct {
Name string
Dash bool
Format FormatWriter
}
cases := []dashEmptyCase{
{Name: "Request Header", Dash: true, Format: requestHeader("foo")},
{Name: "Response Header", Dash: true, Format: responseHeader("foo")},
{Name: "Request Method", Dash: false, Format: requestHttpMethod},
{Name: "Request Proto", Dash: false, Format: requestHttpProto},
{Name: "Request RemoteAddr", Dash: true, Format: requestRemoteAddr},
{Name: "Request Raw Query", Dash: false, Format: rawQuery},
{Name: "Response Status", Dash: false, Format: httpStatus},
{Name: "Request Username", Dash: true, Format: username},
{Name: "Request Host", Dash: true, Format: requestHost},
{Name: "Response ContentLength", Dash: true, Format: responseContentLength},
}
for _, c := range cases {
f(t, c.Name, c.Dash, c.Format)
}
}
func TestResponseWriterDefaultStatusCode(t *testing.T) {
writer := httptest.NewRecorder()
uut := httputil.GetResponseWriter(writer)
if uut.StatusCode() != http.StatusOK {
t.Fail()
}
}
func TestFlusherInterface(t *testing.T) {
var rw httputil.ResponseWriter
var f http.Flusher = &rw
_ = f
}
func TestFlusher(t *testing.T) {
lines := []string{
"Hello, World!",
"Hello again, World!",
}
// We need to synchronize the reads with the writes of each chunk
sync := make(chan struct{})
handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
for _, line := range lines {
if _, err := w.Write([]byte(line)); err != nil {
return
}
if f, ok := w.(http.Flusher); ok {
f.Flush()
}
sync <- struct{}{}
}
close(sync)
})
s := httptest.NewServer(CommonLog.Wrap(handler, ioutil.Discard))
defer s.Close()
req, err := http.NewRequest("GET", s.URL, nil)
if !assert.NoError(t, err, "request creation should succeed") {
return
}
// If it isn't flushing properly and sending chunks, then the call to
// Do() will hang waiting for the entire body, while the handler will be
// stuck after having written the first line. So have an explicit
// timeout for the read.
timer := time.NewTimer(time.Second)
done := make(chan struct{})
go func() {
defer close(done)
resp, err := http.DefaultClient.Do(req)
if !assert.NoError(t, err, "GET should succeed") {
return
}
defer resp.Body.Close()
buf := make([]byte, 64)
var i int
for {
_, ok := <-sync
if !ok {
break
}
n, err := resp.Body.Read(buf)
if n == 0 {
if !assert.Equal(t, len(lines)-1, i-1, "wrong number of chunks") {
return
}
break
}
t.Logf("Response body %d: %d %s", i, n, buf[:n])
if !assert.Equal(t, []byte(lines[i]), buf[:n], "wrong response body") {
return
}
if err == io.EOF {
if !assert.Equal(t, len(lines)-1, i, "wrong number of chunks") {
return
}
break
}
if !assert.NoError(t, err, "Body read should succeed") {
return
}
i++
}
}()
select {
case <-timer.C:
close(sync)
t.Fatal("timed out: not flushing properly?")
case <-done:
}
}