Function TestWaitPreStart_RaceNilErrorAndResult

pkg/compose/pre_start_test.go:344–353

TestWaitPreStart_RaceNilErrorAndResult stress-tests the scheduler outcome when ContainerWait closes a successful stream cleanly: Result has the exit code and Error sends nil at the same instant. Either branch of the outer select must end on the Result-based success, with no spurious failure.

(t *testing.T)

// code and Error sends nil at the same instant. Either branch of the outer
// select must end on the Result-based success, with no spurious failure.
func TestWaitPreStart_RaceNilErrorAndResult(t *testing.T) {
	for i := 0; i < 100; i++ {
		resultC := make(chan container.WaitResponse, 1)
		errC := make(chan error, 1)
		resultC <- container.WaitResponse{StatusCode: 0}
		errC <- nil
		waitRes := client.ContainerWaitResult{Result: resultC, Error: errC}
		assert.NilError(t, waitPreStart(t.Context(), "web", 0, waitRes))
	}
}

// TestWaitPreStart_RaceRealErrorAndResult stress-tests the opposite scenario:
// a real transport error on Error races with a stale Result. The Error must