forked from cerc-io/plugeth
4d3525610e
This PR is a (superior) alternative to https://github.com/ethereum/go-ethereum/pull/26708, it handles deprecation, primarily two specific cases. `rand.Seed` is typically used in two ways - `rand.Seed(time.Now().UnixNano())` -- we seed it, just to be sure to get some random, and not always get the same thing on every run. This is not needed, with global seeding, so those are just removed. - `rand.Seed(1)` this is typically done to ensure we have a stable test. If we rely on this, we need to fix up the tests to use a deterministic prng-source. A few occurrences like this has been replaced with a proper custom source. `rand.Read` has been replaced by `crypto/rand`.`Read` in this PR.
118 lines
2.8 KiB
Go
118 lines
2.8 KiB
Go
// Copyright 2020 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package client
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import (
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"crypto/rand"
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"testing"
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"time"
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"github.com/ethereum/go-ethereum/common/mclock"
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"github.com/ethereum/go-ethereum/p2p/enode"
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"github.com/ethereum/go-ethereum/p2p/enr"
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"github.com/ethereum/go-ethereum/p2p/nodestate"
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)
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type testIter struct {
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waitCh chan struct{}
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nodeCh chan *enode.Node
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node *enode.Node
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}
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func (i *testIter) Next() bool {
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if _, ok := <-i.waitCh; !ok {
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return false
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}
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i.node = <-i.nodeCh
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return true
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}
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func (i *testIter) Node() *enode.Node {
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return i.node
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}
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func (i *testIter) Close() {
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close(i.waitCh)
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}
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func (i *testIter) push() {
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var id enode.ID
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rand.Read(id[:])
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i.nodeCh <- enode.SignNull(new(enr.Record), id)
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}
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func (i *testIter) waiting(timeout time.Duration) bool {
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select {
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case i.waitCh <- struct{}{}:
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return true
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case <-time.After(timeout):
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return false
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}
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}
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func TestFillSet(t *testing.T) {
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ns := nodestate.NewNodeStateMachine(nil, nil, &mclock.Simulated{}, testSetup)
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iter := &testIter{
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waitCh: make(chan struct{}),
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nodeCh: make(chan *enode.Node),
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}
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fs := NewFillSet(ns, iter, sfTest1)
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ns.Start()
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expWaiting := func(i int, push bool) {
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for ; i > 0; i-- {
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if !iter.waiting(time.Second * 10) {
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t.Fatalf("FillSet not waiting for new nodes")
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}
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if push {
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iter.push()
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}
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}
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}
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expNotWaiting := func() {
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if iter.waiting(time.Millisecond * 100) {
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t.Fatalf("FillSet unexpectedly waiting for new nodes")
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}
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}
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expNotWaiting()
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fs.SetTarget(3)
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expWaiting(3, true)
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expNotWaiting()
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fs.SetTarget(100)
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expWaiting(2, true)
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expWaiting(1, false)
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// lower the target before the previous one has been filled up
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fs.SetTarget(0)
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iter.push()
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expNotWaiting()
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fs.SetTarget(10)
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expWaiting(4, true)
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expNotWaiting()
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// remove all previously set flags
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ns.ForEach(sfTest1, nodestate.Flags{}, func(node *enode.Node, state nodestate.Flags) {
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ns.SetState(node, nodestate.Flags{}, sfTest1, 0)
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})
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// now expect FillSet to fill the set up again with 10 new nodes
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expWaiting(10, true)
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expNotWaiting()
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fs.Close()
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ns.Stop()
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}
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