stop_test.go

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//
//     http://www.apache.org/licenses/LICENSE-2.0
//
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// under the License.

package beater

import (
	"testing"
	"time"

	"github.com/elastic/elastic-agent-libs/logp"
)

// TestStopWaitsForRunReady proves that Stop does not close the done channel
// until Run has closed runReady (i.e., reached waitFinished.Wait).
// This guards against a race where the OTel collector calls Shutdown before
// the beat's Run goroutine has initialised its shutdown-signal machinery.
func TestStopWaitsForRunReady(t *testing.T) {
	fb := &Filebeat{
		done:     make(chan struct{}),
		runReady: &closeOnce{ch: make(chan struct{})},
		logger:   logp.NewNopLogger(),
	}

	stopDone := make(chan struct{})
	go func() {
		defer close(stopDone)
		fb.Stop()
	}()

	// done must still be open: Stop is waiting for runReady to be closed.
	select {
	case <-fb.done:
		t.Fatal("Stop closed done before Run closed runReady")
	default:
	}

	// Simulate Run() reaching the waitFinished.Wait() call.
	fb.runReady.Close()

	select {
	case <-fb.done:
	case <-time.After(500 * time.Millisecond):
		t.Fatal("Stop did not close done after runReady was closed")
	}

	<-stopDone
}