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103 lines
2.8 KiB
Go
103 lines
2.8 KiB
Go
package handler
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import (
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"fmt"
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"net/http"
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"net/http/httptest"
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"testing"
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"zero/core/logx"
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"zero/core/stat"
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"github.com/stretchr/testify/assert"
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)
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func init() {
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logx.Disable()
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stat.SetReporter(nil)
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}
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func TestBreakerHandlerAccept(t *testing.T) {
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metrics := stat.NewMetrics("unit-test")
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breakerHandler := BreakerHandler(http.MethodGet, "/", metrics)
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handler := breakerHandler(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("X-Test", "test")
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_, err := w.Write([]byte("content"))
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assert.Nil(t, err)
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}))
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req := httptest.NewRequest(http.MethodGet, "http://localhost", nil)
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req.Header.Set("X-Test", "test")
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resp := httptest.NewRecorder()
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handler.ServeHTTP(resp, req)
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assert.Equal(t, http.StatusOK, resp.Code)
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assert.Equal(t, "test", resp.Header().Get("X-Test"))
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assert.Equal(t, "content", resp.Body.String())
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}
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func TestBreakerHandlerFail(t *testing.T) {
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metrics := stat.NewMetrics("unit-test")
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breakerHandler := BreakerHandler(http.MethodGet, "/", metrics)
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handler := breakerHandler(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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w.WriteHeader(http.StatusBadGateway)
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}))
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req := httptest.NewRequest(http.MethodGet, "http://localhost", nil)
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resp := httptest.NewRecorder()
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handler.ServeHTTP(resp, req)
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assert.Equal(t, http.StatusBadGateway, resp.Code)
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}
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func TestBreakerHandler_4XX(t *testing.T) {
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metrics := stat.NewMetrics("unit-test")
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breakerHandler := BreakerHandler(http.MethodGet, "/", metrics)
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handler := breakerHandler(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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w.WriteHeader(http.StatusBadRequest)
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}))
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for i := 0; i < 1000; i++ {
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req := httptest.NewRequest(http.MethodGet, "http://localhost", nil)
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resp := httptest.NewRecorder()
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handler.ServeHTTP(resp, req)
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}
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const tries = 100
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var pass int
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for i := 0; i < tries; i++ {
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req := httptest.NewRequest(http.MethodGet, "http://localhost", nil)
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resp := httptest.NewRecorder()
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handler.ServeHTTP(resp, req)
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if resp.Code == http.StatusBadRequest {
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pass++
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}
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}
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assert.Equal(t, tries, pass)
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}
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func TestBreakerHandlerReject(t *testing.T) {
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metrics := stat.NewMetrics("unit-test")
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breakerHandler := BreakerHandler(http.MethodGet, "/", metrics)
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handler := breakerHandler(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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w.WriteHeader(http.StatusInternalServerError)
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}))
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for i := 0; i < 1000; i++ {
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req := httptest.NewRequest(http.MethodGet, "http://localhost", nil)
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resp := httptest.NewRecorder()
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handler.ServeHTTP(resp, req)
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}
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var drops int
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for i := 0; i < 100; i++ {
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req := httptest.NewRequest(http.MethodGet, "http://localhost", nil)
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resp := httptest.NewRecorder()
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handler.ServeHTTP(resp, req)
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if resp.Code == http.StatusServiceUnavailable {
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drops++
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}
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}
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assert.True(t, drops >= 80, fmt.Sprintf("expected to be greater than 80, but got %d", drops))
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}
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