func TestBalancerEmptyNodes(t *testing.T) {
b := cluster.NewNodeBalancer([]meta.NodeInfo{})
got := b.Next()
if got != nil {
t.Errorf("expected nil, got %v", got)
}
}
func TestBalancerUp(t *testing.T) {
nodes := NewNodes()
b := cluster.NewNodeBalancer(nodes)
// First node in randomized round-robin order
first := b.Next()
if first == nil {
t.Errorf("expected datanode, got %v", first)
}
// Second node in randomized round-robin order
second := b.Next()
if second == nil {
t.Errorf("expected datanode, got %v", second)
}
// Should never get the same node in order twice
if first.ID == second.ID {
t.Errorf("expected first != second. got %v = %v", first.ID, second.ID)
}
}