mirror of https://github.com/XTLS/Xray-core
406 lines
9.5 KiB
Go
406 lines
9.5 KiB
Go
package stats_test
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import (
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"context"
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"fmt"
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"testing"
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"time"
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. "github.com/xtls/xray-core/app/stats"
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"github.com/xtls/xray-core/common"
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"github.com/xtls/xray-core/features/stats"
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)
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func TestStatsChannel(t *testing.T) {
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// At most 2 subscribers could be registered
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c := NewChannel(&ChannelConfig{SubscriberLimit: 2, Blocking: true})
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a, err := stats.SubscribeRunnableChannel(c)
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common.Must(err)
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if !c.Running() {
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t.Fatal("unexpected failure in running channel after first subscription")
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}
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b, err := c.Subscribe()
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common.Must(err)
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// Test that third subscriber is forbidden
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_, err = c.Subscribe()
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if err == nil {
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t.Fatal("unexpected successful subscription")
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}
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t.Log("expected error: ", err)
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stopCh := make(chan struct{})
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errCh := make(chan string)
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go func() {
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c.Publish(context.Background(), 1)
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c.Publish(context.Background(), 2)
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c.Publish(context.Background(), "3")
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c.Publish(context.Background(), []int{4})
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stopCh <- struct{}{}
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}()
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go func() {
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if v, ok := (<-a).(int); !ok || v != 1 {
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errCh <- fmt.Sprint("unexpected receiving: ", v, ", wanted ", 1)
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}
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if v, ok := (<-a).(int); !ok || v != 2 {
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errCh <- fmt.Sprint("unexpected receiving: ", v, ", wanted ", 2)
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}
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if v, ok := (<-a).(string); !ok || v != "3" {
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errCh <- fmt.Sprint("unexpected receiving: ", v, ", wanted ", "3")
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}
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if v, ok := (<-a).([]int); !ok || v[0] != 4 {
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errCh <- fmt.Sprint("unexpected receiving: ", v, ", wanted ", []int{4})
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}
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stopCh <- struct{}{}
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}()
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go func() {
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if v, ok := (<-b).(int); !ok || v != 1 {
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errCh <- fmt.Sprint("unexpected receiving: ", v, ", wanted ", 1)
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}
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if v, ok := (<-b).(int); !ok || v != 2 {
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errCh <- fmt.Sprint("unexpected receiving: ", v, ", wanted ", 2)
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}
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if v, ok := (<-b).(string); !ok || v != "3" {
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errCh <- fmt.Sprint("unexpected receiving: ", v, ", wanted ", "3")
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}
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if v, ok := (<-b).([]int); !ok || v[0] != 4 {
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errCh <- fmt.Sprint("unexpected receiving: ", v, ", wanted ", []int{4})
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}
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stopCh <- struct{}{}
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}()
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timeout := time.After(2 * time.Second)
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for i := 0; i < 3; i++ {
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select {
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case <-timeout:
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t.Fatal("Test timeout after 2s")
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case e := <-errCh:
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t.Fatal(e)
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case <-stopCh:
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}
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}
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// Test the unsubscription of channel
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common.Must(c.Unsubscribe(b))
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// Test the last subscriber will close channel with `UnsubscribeClosableChannel`
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common.Must(stats.UnsubscribeClosableChannel(c, a))
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if c.Running() {
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t.Fatal("unexpected running channel after unsubscribing the last subscriber")
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}
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}
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func TestStatsChannelUnsubcribe(t *testing.T) {
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c := NewChannel(&ChannelConfig{Blocking: true})
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common.Must(c.Start())
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defer c.Close()
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a, err := c.Subscribe()
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common.Must(err)
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defer c.Unsubscribe(a)
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b, err := c.Subscribe()
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common.Must(err)
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pauseCh := make(chan struct{})
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stopCh := make(chan struct{})
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errCh := make(chan string)
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{
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var aSet, bSet bool
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for _, s := range c.Subscribers() {
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if s == a {
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aSet = true
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}
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if s == b {
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bSet = true
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}
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}
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if !(aSet && bSet) {
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t.Fatal("unexpected subscribers: ", c.Subscribers())
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}
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}
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go func() { // Blocking publish
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c.Publish(context.Background(), 1)
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<-pauseCh // Wait for `b` goroutine to resume sending message
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c.Publish(context.Background(), 2)
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}()
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go func() {
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if v, ok := (<-a).(int); !ok || v != 1 {
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errCh <- fmt.Sprint("unexpected receiving: ", v, ", wanted ", 1)
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}
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if v, ok := (<-a).(int); !ok || v != 2 {
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errCh <- fmt.Sprint("unexpected receiving: ", v, ", wanted ", 2)
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}
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}()
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go func() {
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if v, ok := (<-b).(int); !ok || v != 1 {
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errCh <- fmt.Sprint("unexpected receiving: ", v, ", wanted ", 1)
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}
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// Unsubscribe `b` while publishing is paused
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c.Unsubscribe(b)
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{ // Test `b` is not in subscribers
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var aSet, bSet bool
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for _, s := range c.Subscribers() {
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if s == a {
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aSet = true
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}
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if s == b {
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bSet = true
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}
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}
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if !(aSet && !bSet) {
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errCh <- fmt.Sprint("unexpected subscribers: ", c.Subscribers())
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}
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}
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// Resume publishing progress
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close(pauseCh)
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// Test `b` is neither closed nor able to receive any data
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select {
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case v, ok := <-b:
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if ok {
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errCh <- fmt.Sprint("unexpected data received: ", v)
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} else {
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errCh <- fmt.Sprint("unexpected closed channel: ", b)
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}
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default:
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}
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close(stopCh)
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}()
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select {
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case <-time.After(2 * time.Second):
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t.Fatal("Test timeout after 2s")
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case e := <-errCh:
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t.Fatal(e)
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case <-stopCh:
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}
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}
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func TestStatsChannelBlocking(t *testing.T) {
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// Do not use buffer so as to create blocking scenario
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c := NewChannel(&ChannelConfig{BufferSize: 0, Blocking: true})
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common.Must(c.Start())
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defer c.Close()
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a, err := c.Subscribe()
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common.Must(err)
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defer c.Unsubscribe(a)
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pauseCh := make(chan struct{})
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stopCh := make(chan struct{})
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errCh := make(chan string)
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ctx, cancel := context.WithCancel(context.Background())
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// Test blocking channel publishing
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go func() {
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// Dummy messsage with no subscriber receiving, will block broadcasting goroutine
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c.Publish(context.Background(), nil)
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<-pauseCh
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// Publishing should be blocked here, for last message was not cleared and buffer was full
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c.Publish(context.Background(), nil)
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pauseCh <- struct{}{}
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// Publishing should still be blocked here
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c.Publish(ctx, nil)
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// Check publishing is done because context is canceled
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select {
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case <-ctx.Done():
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if ctx.Err() != context.Canceled {
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errCh <- fmt.Sprint("unexpected error: ", ctx.Err())
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}
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default:
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errCh <- "unexpected non-blocked publishing"
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}
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close(stopCh)
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}()
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go func() {
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pauseCh <- struct{}{}
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select {
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case <-pauseCh:
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errCh <- "unexpected non-blocked publishing"
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case <-time.After(100 * time.Millisecond):
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}
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// Receive first published message
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<-a
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select {
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case <-pauseCh:
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case <-time.After(100 * time.Millisecond):
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errCh <- "unexpected blocking publishing"
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}
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// Manually cancel the context to end publishing
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cancel()
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}()
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select {
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case <-time.After(2 * time.Second):
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t.Fatal("Test timeout after 2s")
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case e := <-errCh:
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t.Fatal(e)
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case <-stopCh:
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}
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}
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func TestStatsChannelNonBlocking(t *testing.T) {
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// Do not use buffer so as to create blocking scenario
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c := NewChannel(&ChannelConfig{BufferSize: 0, Blocking: false})
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common.Must(c.Start())
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defer c.Close()
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a, err := c.Subscribe()
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common.Must(err)
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defer c.Unsubscribe(a)
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pauseCh := make(chan struct{})
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stopCh := make(chan struct{})
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errCh := make(chan string)
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ctx, cancel := context.WithCancel(context.Background())
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// Test blocking channel publishing
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go func() {
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c.Publish(context.Background(), nil)
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c.Publish(context.Background(), nil)
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pauseCh <- struct{}{}
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<-pauseCh
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c.Publish(ctx, nil)
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c.Publish(ctx, nil)
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// Check publishing is done because context is canceled
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select {
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case <-ctx.Done():
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if ctx.Err() != context.Canceled {
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errCh <- fmt.Sprint("unexpected error: ", ctx.Err())
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}
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case <-time.After(100 * time.Millisecond):
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errCh <- "unexpected non-cancelled publishing"
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}
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}()
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go func() {
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// Check publishing won't block even if there is no subscriber receiving message
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select {
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case <-pauseCh:
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case <-time.After(100 * time.Millisecond):
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errCh <- "unexpected blocking publishing"
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}
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// Receive first and second published message
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<-a
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<-a
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pauseCh <- struct{}{}
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// Manually cancel the context to end publishing
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cancel()
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// Check third and forth published message is cancelled and cannot receive
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<-time.After(100 * time.Millisecond)
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select {
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case <-a:
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errCh <- "unexpected non-cancelled publishing"
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default:
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}
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select {
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case <-a:
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errCh <- "unexpected non-cancelled publishing"
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default:
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}
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close(stopCh)
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}()
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select {
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case <-time.After(2 * time.Second):
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t.Fatal("Test timeout after 2s")
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case e := <-errCh:
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t.Fatal(e)
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case <-stopCh:
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}
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}
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func TestStatsChannelConcurrency(t *testing.T) {
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// Do not use buffer so as to create blocking scenario
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c := NewChannel(&ChannelConfig{BufferSize: 0, Blocking: true})
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common.Must(c.Start())
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defer c.Close()
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a, err := c.Subscribe()
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common.Must(err)
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defer c.Unsubscribe(a)
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b, err := c.Subscribe()
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common.Must(err)
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defer c.Unsubscribe(b)
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stopCh := make(chan struct{})
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errCh := make(chan string)
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go func() { // Blocking publish
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c.Publish(context.Background(), 1)
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c.Publish(context.Background(), 2)
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}()
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go func() {
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if v, ok := (<-a).(int); !ok || v != 1 {
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errCh <- fmt.Sprint("unexpected receiving: ", v, ", wanted ", 1)
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}
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if v, ok := (<-a).(int); !ok || v != 2 {
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errCh <- fmt.Sprint("unexpected receiving: ", v, ", wanted ", 2)
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}
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}()
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go func() {
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// Block `b` for a time so as to ensure source channel is trying to send message to `b`.
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<-time.After(25 * time.Millisecond)
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// This causes concurrency scenario: unsubscribe `b` while trying to send message to it
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c.Unsubscribe(b)
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// Test `b` is not closed and can still receive data 1:
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// Because unsubscribe won't affect the ongoing process of sending message.
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select {
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case v, ok := <-b:
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if v1, ok1 := v.(int); !(ok && ok1 && v1 == 1) {
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errCh <- fmt.Sprint("unexpected failure in receiving data: ", 1)
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}
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default:
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errCh <- fmt.Sprint("unexpected block from receiving data: ", 1)
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}
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// Test `b` is not closed but cannot receive data 2:
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// Because in a new round of messaging, `b` has been unsubscribed.
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select {
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case v, ok := <-b:
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if ok {
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errCh <- fmt.Sprint("unexpected receiving: ", v)
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} else {
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errCh <- "unexpected closing of channel"
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}
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default:
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}
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close(stopCh)
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}()
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select {
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case <-time.After(2 * time.Second):
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t.Fatal("Test timeout after 2s")
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case e := <-errCh:
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t.Fatal(e)
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case <-stopCh:
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}
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}
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