mirror of https://github.com/knative/pkg.git
382 lines
10 KiB
Go
382 lines
10 KiB
Go
/*
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Copyright 2019 The Knative Authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package prober
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import (
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"context"
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"errors"
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"net"
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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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"k8s.io/apimachinery/pkg/util/wait"
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"knative.dev/pkg/network"
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)
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const (
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systemName = "test-server"
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unexpectedProbeMessage = "unexpected probe header value: whatever"
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probeInterval = 10 * time.Millisecond
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probeTimeout = 200 * time.Millisecond
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)
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func probeServeFunc(w http.ResponseWriter, r *http.Request) {
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s := r.Header.Get(network.ProbeHeaderName)
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switch s {
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case "":
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// No header.
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w.WriteHeader(http.StatusNotFound)
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case systemName:
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// Expected header value.
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w.Write([]byte(systemName))
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default:
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// Unexpected header value.
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w.WriteHeader(http.StatusBadRequest)
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w.Write([]byte(unexpectedProbeMessage))
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}
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}
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func TestDoServing(t *testing.T) {
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ts := httptest.NewServer(http.HandlerFunc(probeServeFunc))
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defer ts.Close()
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tests := []struct {
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name string
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headerValue string
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want bool
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expErr bool
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}{{
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name: "ok",
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headerValue: systemName,
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want: true,
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expErr: false,
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}, {
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name: "wrong system",
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headerValue: "bells-and-whistles",
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want: false,
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expErr: true,
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}, {
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name: "no header",
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headerValue: "",
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want: false,
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expErr: true,
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}}
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for _, test := range tests {
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t.Run(test.name, func(t *testing.T) {
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got, err := Do(context.Background(), network.NewProberTransport(), ts.URL, WithHeader(network.ProbeHeaderName, test.headerValue), ExpectsBody(systemName), ExpectsStatusCodes([]int{http.StatusOK}))
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if want := test.want; got != want {
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t.Errorf("Got = %v, want: %v", got, want)
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}
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if err != nil && !test.expErr {
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t.Errorf("Do() = %v, no error expected", err)
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}
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if err == nil && test.expErr {
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t.Errorf("Do() = nil, expected an error")
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}
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})
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}
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}
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func TestBlackHole(t *testing.T) {
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transport := &http.Transport{
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Dial: (&net.Dialer{
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Timeout: 10 * time.Millisecond,
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}).Dial,
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}
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got, err := Do(context.Background(), transport, "http://gone.fishing.svc.custer.local:8080", ExpectsStatusCodes([]int{http.StatusOK}))
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if want := false; got != want {
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t.Errorf("Got = %v, want: %v", got, want)
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}
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if err == nil {
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t.Error("Do did not return an error")
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}
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}
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func TestBadURL(t *testing.T) {
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_, err := Do(context.Background(), network.NewProberTransport(), ":foo", ExpectsStatusCodes([]int{http.StatusOK}))
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if err == nil {
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t.Error("Do did not return an error")
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}
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t.Log("For the curious the error was:", err)
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}
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func TestDoAsync(t *testing.T) {
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// This replicates the TestDo.
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ts := httptest.NewServer(http.HandlerFunc(probeServeFunc))
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defer ts.Close()
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wch := make(chan interface{})
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defer close(wch)
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tests := []struct {
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name string
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headerValue string
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cb Done
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}{{
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name: "ok",
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headerValue: systemName,
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cb: func(arg interface{}, ret bool, err error) {
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defer func() {
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wch <- 42
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}()
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if got, want := arg.(string), "ok"; got != want {
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t.Errorf("arg = %s, want: %s", got, want)
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}
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if !ret {
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t.Error("result was false")
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}
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},
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}, {
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name: "wrong system",
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headerValue: "bells-and-whistles",
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cb: func(arg interface{}, ret bool, err error) {
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defer func() {
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wch <- 1984
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}()
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if ret {
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t.Error("result was true")
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}
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},
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}, {
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name: "no header",
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headerValue: "",
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cb: func(arg interface{}, ret bool, err error) {
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defer func() {
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wch <- 2006
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}()
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if ret {
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t.Error("result was true")
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}
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},
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}}
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for _, test := range tests {
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t.Run(test.name, func(t *testing.T) {
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m := New(test.cb, network.NewProberTransport())
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m.Offer(context.Background(), ts.URL, test.name, probeInterval, probeTimeout, WithHeader(network.ProbeHeaderName, test.headerValue), ExpectsBody(test.headerValue), ExpectsStatusCodes([]int{http.StatusOK}))
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<-wch
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})
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}
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}
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type thirdTimesTheCharmProber struct {
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calls int
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}
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func (t *thirdTimesTheCharmProber) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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t.calls++
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if t.calls < 3 {
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w.WriteHeader(http.StatusBadRequest)
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w.Write([]byte(unexpectedProbeMessage))
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return
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}
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w.Write([]byte(systemName))
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}
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func TestDoAsyncRepeat(t *testing.T) {
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c := &thirdTimesTheCharmProber{}
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ts := httptest.NewServer(c)
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defer ts.Close()
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wch := make(chan interface{})
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defer close(wch)
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cb := func(arg interface{}, done bool, err error) {
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if !done {
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t.Error("done was false")
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}
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if err != nil {
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t.Error("Unexpected error =", err)
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}
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wch <- arg
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}
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m := New(cb, network.NewProberTransport())
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m.Offer(context.Background(), ts.URL, 42, probeInterval, probeTimeout, WithHeader(network.ProbeHeaderName, systemName), ExpectsBody(systemName), ExpectsStatusCodes([]int{http.StatusOK}))
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<-wch
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if got, want := c.calls, 3; got != want {
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t.Errorf("Probe invocation count = %d, want: %d", got, want)
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}
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}
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func TestDoAsyncTimeout(t *testing.T) {
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ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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w.WriteHeader(http.StatusNotFound)
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}))
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defer ts.Close()
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wch := make(chan interface{})
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defer close(wch)
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cb := func(arg interface{}, done bool, err error) {
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if done {
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t.Errorf("done was true")
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}
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if !errors.Is(err, wait.ErrWaitTimeout) {
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t.Error("Unexpected error =", err)
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}
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wch <- arg
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}
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m := New(cb, network.NewProberTransport())
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m.Offer(context.Background(), ts.URL, 2009, probeInterval, probeTimeout, ExpectsStatusCodes([]int{http.StatusOK}))
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<-wch
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}
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func TestAsyncMultiple(t *testing.T) {
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ts := httptest.NewServer(http.HandlerFunc(probeServeFunc))
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defer ts.Close()
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wch := make(chan interface{})
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defer close(wch)
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cb := func(arg interface{}, done bool, err error) {
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<-wch
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wch <- 2006
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}
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m := New(cb, network.NewProberTransport())
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if !m.Offer(context.Background(), ts.URL, 1984, probeInterval, probeTimeout, ExpectsStatusCodes([]int{http.StatusOK})) {
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t.Error("First call to offer returned false")
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}
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if m.Offer(context.Background(), ts.URL, 1982, probeInterval, probeTimeout, ExpectsStatusCodes([]int{http.StatusOK})) {
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t.Error("Second call to offer returned true")
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}
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if got, want := m.len(), 1; got != want {
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t.Errorf("Number of queued items = %d, want: %d", got, want)
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}
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// Make sure we terminate the first probe.
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wch <- 2009
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<-wch
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wait.PollImmediate(probeInterval, probeTimeout, func() (bool, error) {
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return m.len() == 0, nil
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})
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if got, want := m.len(), 0; got != want {
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t.Errorf("Number of queued items = %d, want: %d", got, want)
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}
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}
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func TestWithPathOption(t *testing.T) {
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const path = "/correct/probe/path/"
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ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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t.Logf("Got: %s, Want: %s\n", r.URL.Path, path)
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if r.URL.Path != path {
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w.WriteHeader(http.StatusNotFound)
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}
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}))
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defer ts.Close()
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tests := []struct {
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name string
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options []interface{}
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}{{
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name: "no path",
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options: []interface{}{ExpectsStatusCodes([]int{http.StatusNotFound})},
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}, {
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name: "expected path",
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options: []interface{}{WithPath(path), ExpectsStatusCodes([]int{http.StatusOK})},
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}, {
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name: "wrong path",
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options: []interface{}{WithPath("/wrong/path"), ExpectsStatusCodes([]int{http.StatusNotFound})},
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}}
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for _, test := range tests {
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t.Run(test.name, func(t *testing.T) {
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if ok, _ := Do(context.Background(), network.AutoTransport, ts.URL, test.options...); !ok {
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t.Error("Unexpected probe failure")
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}
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})
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}
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}
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func TestWithHostOption(t *testing.T) {
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host := "foobar.com"
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ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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t.Logf("Want: %s, Got: %s\n", host, r.Host)
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if r.Host != host {
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w.WriteHeader(http.StatusNotFound)
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}
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}))
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defer ts.Close()
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tests := []struct {
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name string
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options []interface{}
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}{{
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name: "no hosts",
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options: []interface{}{ExpectsStatusCodes([]int{http.StatusNotFound})},
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}, {
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name: "expected host",
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options: []interface{}{WithHost(host), ExpectsStatusCodes([]int{http.StatusOK})},
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}, {
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name: "wrong host",
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options: []interface{}{WithHost("nope.com"), ExpectsStatusCodes([]int{http.StatusNotFound})},
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}}
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for _, test := range tests {
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t.Run(test.name, func(t *testing.T) {
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if ok, _ := Do(context.Background(), network.AutoTransport, ts.URL, test.options...); !ok {
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t.Error("Unexpected probe result")
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}
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})
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}
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}
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func TestExpectsHeaderOption(t *testing.T) {
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ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("Foo", "Bar")
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}))
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defer ts.Close()
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tests := []struct {
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name string
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options []interface{}
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success bool
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expErr bool
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}{{
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name: "header is present",
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options: []interface{}{ExpectsHeader("Foo", "Bar"), ExpectsStatusCodes([]int{http.StatusOK})},
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success: true,
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}, {
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name: "header is absent",
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options: []interface{}{ExpectsHeader("Baz", "Nope"), ExpectsStatusCodes([]int{http.StatusOK})},
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success: false,
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expErr: true,
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}, {
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name: "header value doesn't match",
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options: []interface{}{ExpectsHeader("Foo", "Baz"), ExpectsStatusCodes([]int{http.StatusOK})},
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success: false,
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expErr: true,
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}}
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for _, test := range tests {
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t.Run(test.name, func(t *testing.T) {
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ok, err := Do(context.Background(), network.AutoTransport, ts.URL, test.options...)
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if ok != test.success {
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t.Errorf("unexpected probe result: want: %v, got: %v", test.success, ok)
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}
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if err != nil && !test.expErr {
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t.Errorf("Do() = %v, no error expected", err)
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}
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if err == nil && test.expErr {
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t.Errorf("Do() = nil, expected an error")
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}
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})
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}
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}
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func (m *Manager) len() int {
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m.mu.Lock()
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defer m.mu.Unlock()
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return m.keys.Len()
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}
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