100 lines
2.0 KiB
Go
100 lines
2.0 KiB
Go
// ©AngelaMos | 2026
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// bus_test.go
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package bus_test
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import (
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"context"
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"sync"
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"testing"
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"time"
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"github.com/stretchr/testify/require"
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"github.com/carterperez-dev/monitor-the-situation/backend/internal/bus"
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"github.com/carterperez-dev/monitor-the-situation/backend/internal/events"
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)
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type capturePersister struct {
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mu sync.Mutex
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saved []events.Event
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}
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func (c *capturePersister) Save(_ context.Context, ev events.Event) error {
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c.mu.Lock()
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defer c.mu.Unlock()
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c.saved = append(c.saved, ev)
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return nil
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}
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func (c *capturePersister) Count() int {
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c.mu.Lock()
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defer c.mu.Unlock()
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return len(c.saved)
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}
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type captureBroadcaster struct {
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mu sync.Mutex
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sent []bus.Broadcast
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}
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func (b *captureBroadcaster) Broadcast(topic string, payload []byte) {
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b.mu.Lock()
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defer b.mu.Unlock()
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b.sent = append(b.sent, bus.Broadcast{Topic: topic, Payload: payload})
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}
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func (b *captureBroadcaster) Count() int {
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b.mu.Lock()
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defer b.mu.Unlock()
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return len(b.sent)
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}
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func TestBus_EmitFlowsThroughDispatcher(t *testing.T) {
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persist := &capturePersister{}
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cast := &captureBroadcaster{}
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b := bus.New(bus.Config{
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BufferSize: 16,
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Persister: persist,
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Broadcaster: cast,
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})
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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done := make(chan error, 1)
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go func() { done <- b.Run(ctx) }()
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now := time.Date(2026, 5, 1, 12, 0, 0, 0, time.UTC)
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b.Emit(events.Event{
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Topic: events.TopicHeartbeat,
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Timestamp: now,
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Source: "heartbeat",
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Payload: map[string]string{"ts": now.Format(time.RFC3339Nano)},
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})
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require.Eventually(t, func() bool {
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return persist.Count() == 1 && cast.Count() == 1
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}, 2*time.Second, 10*time.Millisecond)
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cancel()
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require.ErrorIs(t, <-done, context.Canceled)
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}
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func TestBus_DropOnFullBuffer(t *testing.T) {
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persist := &capturePersister{}
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cast := &captureBroadcaster{}
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b := bus.New(bus.Config{
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BufferSize: 1,
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Persister: persist,
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Broadcaster: cast,
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})
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for i := 0; i < 50; i++ {
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b.Emit(events.Event{Topic: events.TopicHeartbeat, Source: "stress"})
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}
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require.Positive(t, b.DroppedCount())
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}
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