@Test
    public void other_errors_during_feed_are_counted_as_errors_that_may_trigger_random_send() {
        setUpSingleNodeFixturesWithInitializedPolicy();
        var checker = policyFactory.getLastParameters().instabilityChecker;
        {
            frame.setMessage(createMessage("id:ns:testdoc:n=1:foo"));
            RoutingNode target = select();
            replyError(target, new com.yahoo.messagebus.Error(DocumentProtocol.ERROR_ABORTED, "shop's closing, go home"));
        }
        assertEquals(1, checker.recordedFailures);
    }
With two failures, one marked down, hopefully the one not marked down doesn't lead us to use the one marked down.
documentapi/src/test/java/com/yahoo/documentapi/messagebus/protocol/test/storagepolicy/ContentPolicyTest.java