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c0a1ed86cb
A simple implementation of latency and loss simulation, applied to writes to the ethernet interface of the NIC. The latency implementation could be optimized substantially later if necessary. Updates #13355 Signed-off-by: James Tucker <james@tailscale.com>
94 lines
2.2 KiB
Go
94 lines
2.2 KiB
Go
// Copyright (c) Tailscale Inc & AUTHORS
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// SPDX-License-Identifier: BSD-3-Clause
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package vnet
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import (
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"testing"
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"time"
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)
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func TestConfig(t *testing.T) {
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tests := []struct {
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name string
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setup func(*Config)
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wantErr string
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}{
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{
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name: "simple",
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setup: func(c *Config) {
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c.AddNode(c.AddNetwork("2.1.1.1", "192.168.1.1/24", EasyNAT, NATPMP))
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c.AddNode(c.AddNetwork("2.2.2.2", "10.2.0.1/16", HardNAT))
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},
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},
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{
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name: "latency-and-loss",
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setup: func(c *Config) {
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n1 := c.AddNetwork("2.1.1.1", "192.168.1.1/24", EasyNAT, NATPMP)
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n1.SetLatency(time.Second)
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n1.SetPacketLoss(0.1)
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c.AddNode(n1)
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c.AddNode(c.AddNetwork("2.2.2.2", "10.2.0.1/16", HardNAT))
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},
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},
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{
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name: "indirect",
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setup: func(c *Config) {
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n1 := c.AddNode(c.AddNetwork("2.1.1.1", "192.168.1.1/24", HardNAT))
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n1.Network().AddService(NATPMP)
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c.AddNode(c.AddNetwork("2.2.2.2", "10.2.0.1/16", NAT("hard")))
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},
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},
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{
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name: "multi-node-in-net",
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setup: func(c *Config) {
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net1 := c.AddNetwork("2.1.1.1", "192.168.1.1/24")
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c.AddNode(net1)
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c.AddNode(net1)
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},
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},
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{
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name: "dup-wan-ip",
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setup: func(c *Config) {
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c.AddNetwork("2.1.1.1", "192.168.1.1/24")
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c.AddNetwork("2.1.1.1", "10.2.0.1/16")
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},
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wantErr: "two networks have the same WAN IP 2.1.1.1; Anycast not (yet?) supported",
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},
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{
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name: "one-to-one-nat-with-multiple-nodes",
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setup: func(c *Config) {
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net1 := c.AddNetwork("2.1.1.1", "192.168.1.1/24", One2OneNAT)
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c.AddNode(net1)
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c.AddNode(net1)
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},
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wantErr: "error creating NAT type \"one2one\" for network 2.1.1.1: can't use one2one NAT type on networks other than single-node networks",
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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var c Config
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tt.setup(&c)
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_, err := New(&c)
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if err == nil {
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if tt.wantErr == "" {
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return
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}
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t.Fatalf("got success; wanted error %q", tt.wantErr)
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}
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if err.Error() != tt.wantErr {
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t.Fatalf("got error %q; want %q", err, tt.wantErr)
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}
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})
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}
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}
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func TestNodeString(t *testing.T) {
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if g, w := (&Node{num: 1}).String(), "node1"; g != w {
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t.Errorf("got %q; want %q", g, w)
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}
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if g, w := (&node{num: 1}).String(), "node1"; g != w {
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t.Errorf("got %q; want %q", g, w)
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}
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}
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