115 lines
3.3 KiB
Go
115 lines
3.3 KiB
Go
package wrr
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import (
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"net/http"
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"net/http/httptest"
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"testing"
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"github.com/containous/traefik/v2/pkg/config/dynamic"
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"github.com/stretchr/testify/assert"
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)
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func Int(v int) *int { return &v }
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type responseRecorder struct {
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*httptest.ResponseRecorder
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save map[string]int
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}
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func (r *responseRecorder) WriteHeader(statusCode int) {
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r.save[r.Header().Get("server")]++
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r.ResponseRecorder.WriteHeader(statusCode)
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}
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func TestBalancer(t *testing.T) {
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balancer := New(nil)
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balancer.AddService("first", http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
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rw.Header().Set("server", "first")
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rw.WriteHeader(http.StatusOK)
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}), Int(3))
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balancer.AddService("second", http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
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rw.Header().Set("server", "second")
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rw.WriteHeader(http.StatusOK)
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}), Int(1))
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recorder := &responseRecorder{ResponseRecorder: httptest.NewRecorder(), save: map[string]int{}}
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for i := 0; i < 4; i++ {
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balancer.ServeHTTP(recorder, httptest.NewRequest(http.MethodGet, "/", nil))
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}
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assert.Equal(t, 3, recorder.save["first"])
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assert.Equal(t, 1, recorder.save["second"])
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}
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func TestBalancerNoService(t *testing.T) {
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balancer := New(nil)
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recorder := httptest.NewRecorder()
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balancer.ServeHTTP(recorder, httptest.NewRequest(http.MethodGet, "/", nil))
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assert.Equal(t, http.StatusInternalServerError, recorder.Result().StatusCode)
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}
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func TestBalancerOneServerZeroWeight(t *testing.T) {
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balancer := New(nil)
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balancer.AddService("first", http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
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rw.Header().Set("server", "first")
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rw.WriteHeader(http.StatusOK)
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}), Int(1))
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balancer.AddService("second", http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {}), Int(0))
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recorder := &responseRecorder{ResponseRecorder: httptest.NewRecorder(), save: map[string]int{}}
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for i := 0; i < 3; i++ {
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balancer.ServeHTTP(recorder, httptest.NewRequest(http.MethodGet, "/", nil))
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}
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assert.Equal(t, 3, recorder.save["first"])
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}
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func TestBalancerAllServersZeroWeight(t *testing.T) {
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balancer := New(nil)
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balancer.AddService("test", http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {}), Int(0))
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balancer.AddService("test2", http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {}), Int(0))
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recorder := httptest.NewRecorder()
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balancer.ServeHTTP(recorder, httptest.NewRequest(http.MethodGet, "/", nil))
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assert.Equal(t, http.StatusInternalServerError, recorder.Result().StatusCode)
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}
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func TestSticky(t *testing.T) {
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balancer := New(&dynamic.Sticky{
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Cookie: &dynamic.Cookie{Name: "test"},
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})
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balancer.AddService("first", http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
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rw.Header().Set("server", "first")
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rw.WriteHeader(http.StatusOK)
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}), Int(1))
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balancer.AddService("second", http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
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rw.Header().Set("server", "second")
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rw.WriteHeader(http.StatusOK)
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}), Int(2))
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recorder := &responseRecorder{ResponseRecorder: httptest.NewRecorder(), save: map[string]int{}}
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req := httptest.NewRequest(http.MethodGet, "/", nil)
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for i := 0; i < 3; i++ {
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for _, cookie := range recorder.Result().Cookies() {
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req.AddCookie(cookie)
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}
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recorder.ResponseRecorder = httptest.NewRecorder()
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balancer.ServeHTTP(recorder, req)
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}
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assert.Equal(t, 0, recorder.save["first"])
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assert.Equal(t, 3, recorder.save["second"])
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}
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