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response_writer_test.go
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response_writer_test.go
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// Copyright 2021 Flamego. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package flamego
import (
"bufio"
"bytes"
"io"
"net"
"net/http"
"net/http/httptest"
"testing"
"time"
"github.com/stretchr/testify/assert"
)
func TestResponseWriter(t *testing.T) {
t.Run("write string", func(t *testing.T) {
resp := httptest.NewRecorder()
w := NewResponseWriter(http.MethodGet, resp)
assert.False(t, w.Written())
_, _ = w.Write([]byte("Hello world"))
assert.Equal(t, w.Status(), resp.Code)
assert.Equal(t, "Hello world", resp.Body.String())
assert.Equal(t, http.StatusOK, w.Status())
assert.Equal(t, 11, w.Size())
assert.True(t, w.Written())
})
t.Run("write strings", func(t *testing.T) {
resp := httptest.NewRecorder()
w := NewResponseWriter(http.MethodGet, resp)
assert.False(t, w.Written())
_, _ = w.Write([]byte("Hello world"))
_, _ = w.Write([]byte("foo bar bat baz"))
assert.Equal(t, w.Status(), resp.Code)
assert.Equal(t, "Hello worldfoo bar bat baz", resp.Body.String())
assert.Equal(t, http.StatusOK, w.Status())
assert.Equal(t, 26, w.Size())
assert.True(t, w.Written())
})
t.Run("write header", func(t *testing.T) {
resp := httptest.NewRecorder()
w := NewResponseWriter(http.MethodGet, resp)
assert.False(t, w.Written())
w.WriteHeader(http.StatusNotFound)
assert.Equal(t, w.Status(), resp.Code)
assert.Empty(t, resp.Body.String())
assert.Equal(t, http.StatusNotFound, w.Status())
assert.Equal(t, 0, w.Size())
assert.True(t, w.Written())
})
t.Run("before funcs", func(t *testing.T) {
resp := httptest.NewRecorder()
w := NewResponseWriter(http.MethodGet, resp)
assert.False(t, w.Written())
var buf bytes.Buffer
w.Before(func(ResponseWriter) {
buf.WriteString("foo")
})
w.Before(func(ResponseWriter) {
buf.WriteString("bar")
})
w.WriteHeader(http.StatusNotFound)
assert.Equal(t, w.Status(), resp.Code)
assert.Empty(t, resp.Body.String())
assert.Equal(t, http.StatusNotFound, w.Status())
assert.Equal(t, 0, w.Size())
assert.Equal(t, "barfoo", buf.String())
})
}
type hijackableResponse struct {
Hijacked bool
}
func newHijackableResponse() *hijackableResponse {
return &hijackableResponse{}
}
func (*hijackableResponse) Header() http.Header { return nil }
func (*hijackableResponse) Write([]byte) (int, error) { return 0, nil }
func (*hijackableResponse) WriteHeader(int) {}
func (*hijackableResponse) Flush() {}
func (h *hijackableResponse) Hijack() (net.Conn, *bufio.ReadWriter, error) {
h.Hijacked = true
return nil, nil, nil
}
func TestResponseWriter_Hijack(t *testing.T) {
t.Run("good", func(t *testing.T) {
hijackable := newHijackableResponse()
w := NewResponseWriter(http.MethodGet, hijackable)
hijacker, ok := w.(http.Hijacker)
assert.True(t, ok)
_, _, err := hijacker.Hijack()
assert.Nil(t, err)
assert.True(t, hijackable.Hijacked)
})
t.Run("bad", func(t *testing.T) {
hijackable := new(http.ResponseWriter)
rw := NewResponseWriter(http.MethodGet, *hijackable)
hijacker, ok := rw.(http.Hijacker)
assert.True(t, ok)
_, _, err := hijacker.Hijack()
assert.NotNil(t, err)
})
}
func TestResponseWriter_Flush(t *testing.T) {
resp := httptest.NewRecorder()
w := NewResponseWriter(http.MethodGet, resp)
f, ok := w.(http.Flusher)
assert.True(t, ok)
r := newRouter(newContext)
r.Get("/events", func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "text/event-stream")
w.Header().Set("Cache-Control", "no-cache")
w.Header().Set("Connection", "keep-alive")
for i := 0; i < 2; i++ {
time.Sleep(10 * time.Millisecond)
_, _ = io.WriteString(w, "data: Hello\n\n")
f.Flush()
}
})
req, err := http.NewRequest(http.MethodGet, "/events", nil)
assert.Nil(t, err)
r.ServeHTTP(resp, req)
assert.Equal(t, http.StatusOK, w.Status())
assert.Equal(t, "data: Hello\n\ndata: Hello\n\n", resp.Body.String())
}
func TestResponseWriter_Push(t *testing.T) {
resp := httptest.NewRecorder()
w := NewResponseWriter(http.MethodGet, resp)
_, ok := w.(http.Pusher)
assert.True(t, ok)
}