100 lines
2.5 KiB
Go
100 lines
2.5 KiB
Go
package throttled_test
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import (
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"errors"
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"net/http"
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"net/http/httptest"
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"testing"
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"time"
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"gopkg.in/throttled/throttled.v2"
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)
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type stubLimiter struct {
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}
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func (sl *stubLimiter) RateLimit(key string, quantity int) (bool, throttled.RateLimitResult, error) {
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switch key {
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case "limit":
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return true, throttled.RateLimitResult{-1, -1, -1, time.Minute}, nil
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case "error":
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return false, throttled.RateLimitResult{}, errors.New("stubLimiter error")
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default:
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return false, throttled.RateLimitResult{1, 2, time.Minute, -1}, nil
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}
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}
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type pathGetter struct{}
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func (*pathGetter) Key(r *http.Request) string {
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return r.URL.Path
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}
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type httpTestCase struct {
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path string
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code int
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headers map[string]string
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}
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func TestHTTPRateLimiter(t *testing.T) {
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limiter := throttled.HTTPRateLimiter{
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RateLimiter: &stubLimiter{},
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VaryBy: &pathGetter{},
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}
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handler := limiter.RateLimit(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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w.WriteHeader(200)
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}))
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runHTTPTestCases(t, handler, []httpTestCase{
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{"ok", 200, map[string]string{"X-Ratelimit-Limit": "1", "X-Ratelimit-Remaining": "2", "X-Ratelimit-Reset": "60"}},
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{"error", 500, map[string]string{}},
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{"limit", 429, map[string]string{"Retry-After": "60"}},
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})
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}
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func TestCustomHTTPRateLimiterHandlers(t *testing.T) {
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limiter := throttled.HTTPRateLimiter{
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RateLimiter: &stubLimiter{},
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VaryBy: &pathGetter{},
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DeniedHandler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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http.Error(w, "custom limit exceeded", 400)
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}),
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Error: func(w http.ResponseWriter, r *http.Request, err error) {
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http.Error(w, "custom internal error", 501)
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},
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}
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handler := limiter.RateLimit(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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w.WriteHeader(200)
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}))
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runHTTPTestCases(t, handler, []httpTestCase{
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{"limit", 400, map[string]string{}},
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{"error", 501, map[string]string{}},
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})
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}
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func runHTTPTestCases(t *testing.T, h http.Handler, cs []httpTestCase) {
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for i, c := range cs {
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req, err := http.NewRequest("GET", c.path, nil)
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if err != nil {
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t.Fatal(err)
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}
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rr := httptest.NewRecorder()
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h.ServeHTTP(rr, req)
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if have, want := rr.Code, c.code; have != want {
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t.Errorf("Expected request %d at %s to return %d but got %d",
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i, c.path, want, have)
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}
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for name, want := range c.headers {
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if have := rr.HeaderMap.Get(name); have != want {
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t.Errorf("Expected request %d at %s to have header '%s: %s' but got '%s'",
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i, c.path, name, want, have)
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}
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}
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}
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}
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