121 lines
2.4 KiB
Go
121 lines
2.4 KiB
Go
package gotelem
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import (
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"log/slog"
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"os"
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"sync"
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"testing"
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"time"
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"github.com/kschamplin/gotelem/skylab"
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)
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func makeEvent() skylab.BusEvent {
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var pkt skylab.Packet = &skylab.BmsMeasurement{
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BatteryVoltage: 12000,
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AuxVoltage: 24000,
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Current: 1.23,
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}
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return skylab.BusEvent{
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Timestamp: time.Now(),
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Name: pkt.String(),
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Data: pkt,
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}
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}
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func TestBroker(t *testing.T) {
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t.Parallel()
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t.Run("test send", func(t *testing.T) {
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flog := slog.New(slog.NewTextHandler(os.Stderr, nil))
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broker := NewBroker(10, flog)
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sub, err := broker.Subscribe("testSub")
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if err != nil {
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t.Fatalf("error subscribing: %v", err)
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}
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testEvent := makeEvent()
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go func() {
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time.Sleep(time.Millisecond * 1)
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broker.Publish("other", testEvent)
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}()
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var recvEvent skylab.BusEvent
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select {
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case recvEvent = <-sub:
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if !testEvent.Equals(&recvEvent) {
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t.Fatalf("events not equal, want %v got %v", testEvent, recvEvent)
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}
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case <-time.After(1 * time.Second):
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t.Fatalf("timeout waiting for packet")
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}
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})
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t.Run("multiple broadcast", func(t *testing.T) {
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flog := slog.New(slog.NewTextHandler(os.Stderr, nil))
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broker := NewBroker(10, flog)
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testEvent := makeEvent()
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wg := sync.WaitGroup{}
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clientFn := func(name string) {
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sub, err := broker.Subscribe(name)
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if err != nil {
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t.Log(err)
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return
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}
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<-sub
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wg.Done()
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}
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wg.Add(2)
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go clientFn("client1")
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go clientFn("client2")
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// yes this is stupid. otherwise we race.
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time.Sleep(10 * time.Millisecond)
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broker.Publish("sender", testEvent)
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done := make(chan bool)
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go func() {
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wg.Wait()
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done <- true
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}()
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select {
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case <-done:
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case <-time.After(1 * time.Second):
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t.Fatal("timeout waiting for clients")
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}
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})
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t.Run("name collision", func(t *testing.T) {
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flog := slog.New(slog.NewTextHandler(os.Stderr, nil))
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broker := NewBroker(10, flog)
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_, err := broker.Subscribe("collide")
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if err != nil {
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t.Fatal(err)
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}
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_, err = broker.Subscribe("collide")
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if err == nil {
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t.Fatal("expected error, got nil")
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}
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})
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t.Run("unsubscribe", func(t *testing.T) {
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flog := slog.New(slog.NewTextHandler(os.Stderr, nil))
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broker := NewBroker(10, flog)
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ch, err := broker.Subscribe("test")
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if err != nil {
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t.Fatal(err)
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}
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broker.Unsubscribe("test")
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_, ok := <-ch
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if ok {
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t.Fatal("expected dead channel, but channel returned result")
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}
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})
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}
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