t.Errorf("unexpected Read count: got %d, want 0", n)
	}
	checkForTimeoutError(t, err)

	testRoundtrip(t, c1)
}

// testPresentTimeout tests that a past deadline set while there are pending
// Read and Write operations immediately times out those operations.
func testPresentTimeout(t *testing.T, c1, c2 net.Conn) {
	var wg sync.WaitGroup
	defer wg.Wait()
	wg.Add(3)

	deadlineSet := make(chan bool, 1)