| // Copyright 2019 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| package main |
| |
| import ( |
| "bytes" |
| "context" |
| "encoding/json" |
| "net" |
| "strings" |
| "testing" |
| |
| "github.com/google/go-cmp/cmp" |
| |
| "go.fuchsia.dev/tools/mdns" |
| ) |
| |
| // fakeMDNS is a fake implementation of MDNS for testing. |
| type fakeMDNS struct { |
| answer *fakeAnswer |
| handlers []func(net.Interface, net.Addr, mdns.Packet) |
| sendEmptyData bool |
| sendTooShortData bool |
| } |
| |
| type fakeAnswer struct { |
| ip string |
| domains []string |
| } |
| |
| func (m *fakeMDNS) AddHandler(f func(net.Interface, net.Addr, mdns.Packet)) { |
| m.handlers = append(m.handlers, f) |
| } |
| func (m *fakeMDNS) AddWarningHandler(func(net.Addr, error)) {} |
| func (m *fakeMDNS) AddErrorHandler(func(error)) {} |
| func (m *fakeMDNS) SendTo(mdns.Packet, *net.UDPAddr) error { return nil } |
| func (m *fakeMDNS) Send(packet mdns.Packet) error { |
| if m.answer != nil { |
| go func() { |
| ifc := net.Interface{} |
| ip := net.IPAddr{IP: net.ParseIP(m.answer.ip).To4()} |
| for _, q := range packet.Questions { |
| switch { |
| case q.Type == mdns.PTR && q.Class == mdns.IN: |
| // 'list' command |
| answers := make([]mdns.Record, len(m.answer.domains)) |
| for _, d := range m.answer.domains { |
| // Cases for malformed response. |
| if m.sendEmptyData { |
| answers = append(answers, mdns.Record{ |
| Class: mdns.IN, |
| Type: mdns.PTR, |
| Data: nil, // Empty data |
| }) |
| continue |
| } |
| if m.sendTooShortData { |
| data := make([]byte, len(d)) // One byte shorter |
| data[0] = byte(len(d)) |
| copy(data[1:], []byte(d[1:])) |
| answers = append(answers, mdns.Record{ |
| Class: mdns.IN, |
| Type: mdns.PTR, |
| Data: data, |
| }) |
| continue |
| } |
| |
| data := make([]byte, len(d)+1) |
| data[0] = byte(len(d)) |
| copy(data[1:], []byte(d)) |
| answers = append(answers, mdns.Record{ |
| Class: mdns.IN, |
| Type: mdns.PTR, |
| Data: data, |
| }) |
| } |
| pkt := mdns.Packet{Answers: answers} |
| for _, h := range m.handlers { |
| h(ifc, &ip, pkt) |
| } |
| case q.Type == mdns.A && q.Class == mdns.IN: |
| // 'resolve' command |
| answers := make([]mdns.Record, len(m.answer.domains)) |
| for _, d := range m.answer.domains { |
| answers = append(answers, mdns.Record{ |
| Class: mdns.IN, |
| Type: mdns.A, |
| Data: net.ParseIP(m.answer.ip).To4(), |
| Domain: d, |
| }) |
| } |
| pkt := mdns.Packet{Answers: answers} |
| for _, h := range m.handlers { |
| h(ifc, &ip, pkt) |
| } |
| } |
| } |
| }() |
| } |
| return nil |
| } |
| func (m *fakeMDNS) Start(context.Context, int) error { return nil } |
| |
| func newDevFinderCmd(handler mDNSHandler, answerDomains []string, sendEmptyData bool, sendTooShortData bool) devFinderCmd { |
| // Because mdnsAddrs have two addresses specified and mdnsPorts have |
| // two ports specified, four MDNS objects are created. To emulate the |
| // case where only one of them responds, create only one fake MDNS |
| // object with answers. The others wouldn't respond at all. See the |
| // Send() method above. |
| mdnsCount := 0 |
| return devFinderCmd{ |
| mdnsHandler: handler, |
| mdnsAddrs: "224.0.0.251,224.0.0.250", |
| mdnsPorts: "5353,5356", |
| timeout: 10, |
| newMDNSFunc: func(addr string) mdnsInterface { |
| mdnsCount++ |
| switch mdnsCount { |
| case 1: |
| return &fakeMDNS{ |
| answer: &fakeAnswer{ |
| ip: "192.168.0.42", |
| domains: answerDomains, |
| }, |
| sendEmptyData: sendEmptyData, |
| sendTooShortData: sendTooShortData, |
| } |
| default: |
| return &fakeMDNS{} |
| } |
| }, |
| } |
| } |
| |
| func compareFuchsiaDevices(d1, d2 *fuchsiaDevice) bool { |
| return cmp.Equal(d1.addr, d2.addr) && cmp.Equal(d1.domain, d2.domain) |
| } |
| |
| //// Tests for the `list` command. |
| |
| func TestListDevices(t *testing.T) { |
| cmd := listCmd{ |
| devFinderCmd: newDevFinderCmd( |
| listMDNSHandler, |
| []string{ |
| "some.domain", |
| "another.domain", |
| }, false, false), |
| } |
| |
| got, err := cmd.listDevices(context.Background()) |
| if err != nil { |
| t.Fatalf("listDevices: %v", err) |
| } |
| want := []*fuchsiaDevice{ |
| { |
| addr: net.ParseIP("192.168.0.42").To4(), |
| domain: "another.domain", |
| }, |
| { |
| addr: net.ParseIP("192.168.0.42").To4(), |
| domain: "some.domain", |
| }, |
| } |
| if d := cmp.Diff(want, got, cmp.Comparer(compareFuchsiaDevices)); d != "" { |
| t.Errorf("listDevices mismatch: (-want +got):\n%s", d) |
| } |
| } |
| |
| func TestListDevices_domainFilter(t *testing.T) { |
| cmd := listCmd{ |
| devFinderCmd: newDevFinderCmd( |
| listMDNSHandler, |
| []string{ |
| "some.domain", |
| "another.domain", |
| }, false, false), |
| domainFilter: "some", |
| } |
| |
| got, err := cmd.listDevices(context.Background()) |
| if err != nil { |
| t.Fatalf("listDevices: %v", err) |
| } |
| want := []*fuchsiaDevice{ |
| { |
| addr: net.ParseIP("192.168.0.42").To4(), |
| domain: "some.domain", |
| }, |
| } |
| if d := cmp.Diff(want, got, cmp.Comparer(compareFuchsiaDevices)); d != "" { |
| t.Errorf("listDevices mismatch: (-want +got):\n%s", d) |
| } |
| } |
| |
| func TestListDevices_emptyData(t *testing.T) { |
| cmd := listCmd{ |
| devFinderCmd: newDevFinderCmd( |
| listMDNSHandler, |
| []string{ |
| "some.domain", |
| "another.domain", |
| }, |
| true, // sendEmptyData |
| false), |
| } |
| |
| // Must not crash. |
| cmd.listDevices(context.Background()) |
| } |
| |
| func TestListDevices_duplicateDevices(t *testing.T) { |
| cmd := listCmd{ |
| devFinderCmd: newDevFinderCmd( |
| listMDNSHandler, |
| []string{ |
| "some.domain", |
| "some.domain", |
| "some.domain", |
| "some.domain", |
| "some.domain", |
| "another.domain", |
| }, |
| false, |
| false), |
| } |
| got, err := cmd.listDevices(context.Background()) |
| if err != nil { |
| t.Fatalf("listDevices: %v", err) |
| } |
| want := []*fuchsiaDevice{ |
| { |
| addr: net.ParseIP("192.168.0.42").To4(), |
| domain: "another.domain", |
| }, |
| { |
| addr: net.ParseIP("192.168.0.42").To4(), |
| domain: "some.domain", |
| }, |
| } |
| if d := cmp.Diff(want, got, cmp.Comparer(compareFuchsiaDevices)); d != "" { |
| t.Errorf("listDevices mismatch: (-want +got):\n%s", d) |
| } |
| } |
| |
| func TestListDevices_tooShortData(t *testing.T) { |
| cmd := listCmd{ |
| devFinderCmd: newDevFinderCmd( |
| listMDNSHandler, |
| []string{ |
| "some.domain", |
| "another.domain", |
| }, |
| false, |
| true, // sendTooShortData |
| ), |
| } |
| |
| // Must not crash. |
| cmd.listDevices(context.Background()) |
| } |
| |
| //// Tests for the `resolve` command. |
| |
| func TestResolveDevices(t *testing.T) { |
| cmd := resolveCmd{ |
| devFinderCmd: newDevFinderCmd( |
| resolveMDNSHandler, |
| []string{ |
| "some.domain.local", |
| "another.domain.local", |
| }, false, false), |
| } |
| |
| got, err := cmd.resolveDevices(context.Background(), "some.domain") |
| if err != nil { |
| t.Fatalf("resolveDevices: %v", err) |
| } |
| want := []*fuchsiaDevice{ |
| { |
| addr: net.ParseIP("192.168.0.42").To4(), |
| domain: "some.domain.local", |
| }, |
| } |
| if d := cmp.Diff(want, got, cmp.Comparer(compareFuchsiaDevices)); d != "" { |
| t.Errorf("resolveDevices mismatch: (-want +got):\n%s", d) |
| } |
| } |
| |
| //// Tests for output functions. |
| |
| func TestOutputNormal(t *testing.T) { |
| devs := []*fuchsiaDevice{ |
| { |
| addr: net.ParseIP("123.12.234.23").To4(), |
| domain: "hello.world", |
| }, |
| { |
| addr: net.ParseIP("11.22.33.44").To4(), |
| domain: "fuchsia.rocks", |
| }, |
| } |
| |
| { |
| var buf strings.Builder |
| cmd := devFinderCmd{output: &buf} |
| |
| cmd.outputNormal(devs, false) |
| |
| got := buf.String() |
| want := `123.12.234.23 |
| 11.22.33.44 |
| ` |
| if d := cmp.Diff(want, got); d != "" { |
| t.Errorf("outputNormal mismatch: (-want +got):\n%s", d) |
| } |
| } |
| |
| { |
| var buf strings.Builder |
| cmd := devFinderCmd{output: &buf} |
| cmd.outputNormal(devs, true) |
| |
| got := buf.String() |
| want := `123.12.234.23 hello.world |
| 11.22.33.44 fuchsia.rocks |
| ` |
| if d := cmp.Diff(want, got); d != "" { |
| t.Errorf("outputNormal(includeDomain) mismatch: (-want +got):\n%s", d) |
| } |
| } |
| } |
| |
| func TestOutputJSON(t *testing.T) { |
| devs := []*fuchsiaDevice{ |
| { |
| addr: net.ParseIP("123.12.234.23").To4(), |
| domain: "hello.world", |
| }, |
| { |
| addr: net.ParseIP("11.22.33.44").To4(), |
| domain: "fuchsia.rocks", |
| }, |
| } |
| |
| { |
| var buf bytes.Buffer |
| cmd := devFinderCmd{ |
| json: true, |
| output: &buf, |
| } |
| |
| cmd.outputJSON(devs, false) |
| |
| var got jsonOutput |
| if err := json.Unmarshal(buf.Bytes(), &got); err != nil { |
| t.Fatalf("json.Unmarshal: %v", err) |
| } |
| want := jsonOutput{ |
| Devices: []jsonDevice{ |
| {Addr: "123.12.234.23"}, |
| {Addr: "11.22.33.44"}, |
| }, |
| } |
| if d := cmp.Diff(want, got); d != "" { |
| t.Errorf("outputNormal mismatch: (-want +got):\n%s", d) |
| } |
| } |
| |
| { |
| var buf bytes.Buffer |
| cmd := devFinderCmd{ |
| json: true, |
| output: &buf, |
| } |
| |
| cmd.outputJSON(devs, true) |
| |
| var got jsonOutput |
| if err := json.Unmarshal(buf.Bytes(), &got); err != nil { |
| t.Fatalf("json.Unmarshal: %v", err) |
| } |
| |
| want := jsonOutput{ |
| Devices: []jsonDevice{ |
| { |
| Addr: "123.12.234.23", |
| Domain: "hello.world", |
| }, |
| { |
| Addr: "11.22.33.44", |
| Domain: "fuchsia.rocks", |
| }, |
| }, |
| } |
| if d := cmp.Diff(want, got); d != "" { |
| t.Errorf("outputNormal(includeDomain) mismatch: (-want +got):\n%s", d) |
| } |
| } |
| } |
