// checkGossip fetches the gossip infoStore from each node and invokes the given
// function. The test passes if the function returns 0 for every node,
// retrying for up to the given duration.
func checkGossip(t *testing.T, c cluster.Cluster, d time.Duration,
f checkGossipFunc) {
util.SucceedsWithin(t, d, func() error {
select {
case <-stopper:
t.Fatalf("interrupted")
return nil
case <-time.After(1 * time.Second):
}
for i := 0; i < c.NumNodes(); i++ {
var m map[string]interface{}
if err := c.Get(i, "/_status/gossip/local", &m); err != nil {
return err
}
infos := m["infos"].(map[string]interface{})
if err := f(infos); err != nil {
return util.Errorf("node %d: %s", i, err)
}
}
return nil
})
}