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|
package httpsnoop
import (
"bytes"
"io"
"io/ioutil"
"net/http"
"net/http/httptest"
"testing"
)
func TestWrap_integration(t *testing.T) {
tests := []struct {
Name string
Handler http.Handler
Hooks Hooks
WantCode int
WantBody []byte
}{
{
Name: "WriteHeader (no hook)",
Handler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusNotFound)
}),
WantCode: http.StatusNotFound,
},
{
Name: "WriteHeader",
Handler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusNotFound)
}),
Hooks: Hooks{
WriteHeader: func(next WriteHeaderFunc) WriteHeaderFunc {
return func(code int) {
if code != http.StatusNotFound {
t.Errorf("got=%d want=%d", code, http.StatusNotFound)
}
next(http.StatusForbidden)
}
},
},
WantCode: http.StatusForbidden,
},
{
Name: "Write (no hook)",
Handler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.Write([]byte("foo"))
}),
WantCode: http.StatusOK,
WantBody: []byte("foo"),
},
{
Name: "Write (rewrite hook)",
Handler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if n, err := w.Write([]byte("foo")); err != nil {
t.Errorf("got=%s", err)
} else if got, want := n, len("foobar"); got != want {
t.Errorf("got=%d want=%d", got, want)
}
}),
Hooks: Hooks{
Write: func(next WriteFunc) WriteFunc {
return func(p []byte) (int, error) {
if string(p) != "foo" {
t.Errorf("%s", p)
}
return next([]byte("foobar"))
}
},
},
WantCode: http.StatusOK,
WantBody: []byte("foobar"),
},
{
Name: "Write (error hook)",
Handler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if n, err := w.Write([]byte("foo")); n != 0 {
t.Errorf("got=%d want=%d", n, 0)
} else if err != io.EOF {
t.Errorf("got=%s want=%s", err, io.EOF)
}
}),
Hooks: Hooks{
Write: func(next WriteFunc) WriteFunc {
return func(p []byte) (int, error) {
if string(p) != "foo" {
t.Errorf("%s", p)
}
return 0, io.EOF
}
},
},
WantCode: http.StatusOK,
},
}
for _, test := range tests {
func() {
h := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
sw := Wrap(w, test.Hooks)
test.Handler.ServeHTTP(sw, r)
})
s := httptest.NewServer(h)
defer s.Close()
res, err := http.Get(s.URL)
if err != nil {
t.Fatal(err)
}
defer res.Body.Close()
gotBody, err := ioutil.ReadAll(res.Body)
if res.StatusCode != test.WantCode {
t.Errorf("got=%d want=%d", res.StatusCode, test.WantCode)
} else if !bytes.Equal(gotBody, test.WantBody) {
t.Errorf("got=%s want=%s", gotBody, test.WantBody)
}
}()
}
}
|
