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-rw-r--r--p2p/simulations/mocker_test.go171
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diff --git a/p2p/simulations/mocker_test.go b/p2p/simulations/mocker_test.go
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+// Copyright 2017 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+// Package simulations simulates p2p networks.
+// A mokcer simulates starting and stopping real nodes in a network.
+package simulations
+
+import (
+ "encoding/json"
+ "net/http"
+ "net/url"
+ "strconv"
+ "sync"
+ "testing"
+ "time"
+
+ "github.com/ethereum/go-ethereum/p2p/discover"
+)
+
+func TestMocker(t *testing.T) {
+ //start the simulation HTTP server
+ _, s := testHTTPServer(t)
+ defer s.Close()
+
+ //create a client
+ client := NewClient(s.URL)
+
+ //start the network
+ err := client.StartNetwork()
+ if err != nil {
+ t.Fatalf("Could not start test network: %s", err)
+ }
+ //stop the network to terminate
+ defer func() {
+ err = client.StopNetwork()
+ if err != nil {
+ t.Fatalf("Could not stop test network: %s", err)
+ }
+ }()
+
+ //get the list of available mocker types
+ resp, err := http.Get(s.URL + "/mocker")
+ if err != nil {
+ t.Fatalf("Could not get mocker list: %s", err)
+ }
+ defer resp.Body.Close()
+
+ if resp.StatusCode != 200 {
+ t.Fatalf("Invalid Status Code received, expected 200, got %d", resp.StatusCode)
+ }
+
+ //check the list is at least 1 in size
+ var mockerlist []string
+ err = json.NewDecoder(resp.Body).Decode(&mockerlist)
+ if err != nil {
+ t.Fatalf("Error decoding JSON mockerlist: %s", err)
+ }
+
+ if len(mockerlist) < 1 {
+ t.Fatalf("No mockers available")
+ }
+
+ nodeCount := 10
+ var wg sync.WaitGroup
+
+ events := make(chan *Event, 10)
+ var opts SubscribeOpts
+ sub, err := client.SubscribeNetwork(events, opts)
+ defer sub.Unsubscribe()
+ //wait until all nodes are started and connected
+ //store every node up event in a map (value is irrelevant, mimic Set datatype)
+ nodemap := make(map[discover.NodeID]bool)
+ wg.Add(1)
+ nodesComplete := false
+ connCount := 0
+ go func() {
+ for {
+ select {
+ case event := <-events:
+ //if the event is a node Up event only
+ if event.Node != nil && event.Node.Up == true {
+ //add the correspondent node ID to the map
+ nodemap[event.Node.Config.ID] = true
+ //this means all nodes got a nodeUp event, so we can continue the test
+ if len(nodemap) == nodeCount {
+ nodesComplete = true
+ //wait for 3s as the mocker will need time to connect the nodes
+ //time.Sleep( 3 *time.Second)
+ }
+ } else if event.Conn != nil && nodesComplete {
+ connCount += 1
+ if connCount == (nodeCount-1)*2 {
+ wg.Done()
+ return
+ }
+ }
+ case <-time.After(30 * time.Second):
+ wg.Done()
+ t.Fatalf("Timeout waiting for nodes being started up!")
+ }
+ }
+ }()
+
+ //take the last element of the mockerlist as the default mocker-type to ensure one is enabled
+ mockertype := mockerlist[len(mockerlist)-1]
+ //still, use hardcoded "probabilistic" one if available ;)
+ for _, m := range mockerlist {
+ if m == "probabilistic" {
+ mockertype = m
+ break
+ }
+ }
+ //start the mocker with nodeCount number of nodes
+ resp, err = http.PostForm(s.URL+"/mocker/start", url.Values{"mocker-type": {mockertype}, "node-count": {strconv.Itoa(nodeCount)}})
+ if err != nil {
+ t.Fatalf("Could not start mocker: %s", err)
+ }
+ if resp.StatusCode != 200 {
+ t.Fatalf("Invalid Status Code received for starting mocker, expected 200, got %d", resp.StatusCode)
+ }
+
+ wg.Wait()
+
+ //check there are nodeCount number of nodes in the network
+ nodes_info, err := client.GetNodes()
+ if err != nil {
+ t.Fatalf("Could not get nodes list: %s", err)
+ }
+
+ if len(nodes_info) != nodeCount {
+ t.Fatalf("Expected %d number of nodes, got: %d", nodeCount, len(nodes_info))
+ }
+
+ //stop the mocker
+ resp, err = http.Post(s.URL+"/mocker/stop", "", nil)
+ if err != nil {
+ t.Fatalf("Could not stop mocker: %s", err)
+ }
+ if resp.StatusCode != 200 {
+ t.Fatalf("Invalid Status Code received for stopping mocker, expected 200, got %d", resp.StatusCode)
+ }
+
+ //reset the network
+ _, err = http.Post(s.URL+"/reset", "", nil)
+ if err != nil {
+ t.Fatalf("Could not reset network: %s", err)
+ }
+
+ //now the number of nodes in the network should be zero
+ nodes_info, err = client.GetNodes()
+ if err != nil {
+ t.Fatalf("Could not get nodes list: %s", err)
+ }
+
+ if len(nodes_info) != 0 {
+ t.Fatalf("Expected empty list of nodes, got: %d", len(nodes_info))
+ }
+}