// SendFromHost and all its predecessors from `host_graph`.
    std::vector<Node*> nodes;
    nodes.reserve(g->num_op_nodes());
    for (Node* n : g->op_nodes()) {
      nodes.push_back(n);
    }
    for (Node* n : nodes) {
      g->RemoveNode(n);
    }
    Node* start_node = pivot_node ? pivot_node : host_graph->source_node();

grafana-node.png...

		st.MakePod().Name("pod4").UID("pod4").SchedulerName("match-node3").Obj(),
	}
	wantBindings := map[string]string{
		"pod1": "node3",
		"pod2": "node2",
		"pod3": "node2",
		"pod4": "node3",
	}
	wantControllers := map[string]string{
		"pod1": "match-node3",
		"pod2": "match-node2",
		"pod3": "match-node2",
		"pod4": "match-node3",
	}

	// Set up scheduler for the 3 nodes.

				Obj(),
			nodes: []*v1.Node{
				st.MakeNode().Name("node-a").Label("zone", "zone1").Label("node", "node-a").Obj(),
				st.MakeNode().Name("node-b").Label("zone", "zone1").Label("node", "node-b").Obj(),
				st.MakeNode().Name("node-x").Label("zone", "zone2").Label("node", "node-x").Obj(),
				st.MakeNode().Name("node-y").Label("zone", "zone2").Label("node", "node-y").Obj(),
			},
			want: &preFilterState{

# - ZONE
function create-linux-nodes() {
  local template_name="${NODE_INSTANCE_PREFIX}-template"
  local extra_template_name="${NODE_INSTANCE_PREFIX}-extra-template"

  local nodes="${NUM_NODES}"
  if [[ -n "${HEAPSTER_MACHINE_TYPE:-}" ]]; then
    echo "Creating a special node for heapster with machine-type ${HEAPSTER_MACHINE_TYPE}"
    create-heapster-node
    nodes=$(( nodes - 1 ))
  fi

grafana-replication-node.png...

  // Gets the input and output nodes corresponding to the specified input and
  // output nodes in specs_. If there are no input or output nodes specified,
  // nodes will be empty.
  Status GetInputOutputNodes(
      const std::unordered_map<string, Node*>& node_name_map,
      std::unordered_set<const Node*>* nodes);

  // The input graph with backedges removed. The removed backedges are stored
  // in the back_edge_helper.

			},
			lease:                   createNodeLease("node0", metav1.NewMicroTime(fakeNow.Time)),
			expectedRequestCount:    1, // List
			expectedNodes:           nil,
			expectedPodStatusUpdate: false,
		},
		// Node created long time ago, without status. Node lease is missing.
		// Expect Unknown status posted from node controller.
		{

}

type testNodeLister struct {
	nodes []*v1.Node
}

func (nl testNodeLister) Get(name string) (*v1.Node, error) {
	for _, node := range nl.nodes {
		if node.Name == name {
			return node, nil
		}
	}
	return nil, fmt.Errorf("Node with name: %s does not exist", name)
}

func (nl testNodeLister) List(_ labels.Selector) (ret []*v1.Node, err error) {
	return nl.nodes, nil
}

}

// Copies `src_graph` into `dst_graph`. Any node in `src_graph` with input
// `src_inputs[i]` will have that input replaced with `dst_inputs[i]`.  `prefix`
// will be prepended to copied node names. `control_deps` are nodes in
// `dst_graph` that the copied `src_graph` nodes will have control dependencies
// on. `return_nodes` are nodes in `src_graph`, and the new corresponding nodes