| 1 | package main |
| 2 | |
| 3 | import ( |
| 4 | "archive/zip" |
| 5 | "bytes" |
| 6 | "crypto/sha256" |
| 7 | "encoding/json" |
| 8 | "fmt" |
| 9 | "io" |
| 10 | "strings" |
| 11 | "testing" |
| 12 | ) |
| 13 | |
| 14 | func validScrollDiagnosticsPayload(t *testing.T) string { |
| 15 | t.Helper() |
| 16 | payload := map[string]any{ |
| 17 | "schemaVersion": 2, |
| 18 | "manifest": map[string]any{ |
| 19 | "reportId": "0123456789abcdef0123456789abcdef", |
| 20 | "createdAt": "2026-08-19T03:00:00.000Z", |
| 21 | "buildCommit": "5386a938", |
| 22 | "buildChannel": "test", |
| 23 | "platform": "windows", |
| 24 | "userAgent": "Mozilla/5.0 diagnostic-test", |
| 25 | "devicePixelRatio": 1.25, |
| 26 | "viewportWidth": 1440, |
| 27 | "viewportHeight": 900, |
| 28 | "reducedMotion": false, |
| 29 | "transcriptWidth": 1180, |
| 30 | "contentWidth": 960, |
| 31 | "fontSize": 14, |
| 32 | "lineHeight": 23.52, |
| 33 | "processFoldPreference": "auto", |
| 34 | "reasoningDisplayMode": "summary", |
| 35 | }, |
| 36 | "summary": map[string]any{ |
| 37 | "durationMs": 1200, |
| 38 | "eventCount": 5, |
| 39 | "droppedEventCount": 0, |
| 40 | "markerCount": 1, |
| 41 | }, |
| 42 | "events": []any{ |
| 43 | map[string]any{"t": 0, "type": "start"}, |
| 44 | map[string]any{"t": 350, "type": "row-measure", "rowIndex": 44, "rowKind": "answer", "estimatedSize": 1800, "previousSize": 1800, "measuredSize": 420, "sizeDelta": -1380, "contentRevision": 3, "foldState": "closed", "disclosureCount": 1}, |
| 45 | map[string]any{"t": 500, "type": "mark"}, |
| 46 | map[string]any{"t": 700, "type": "scroll-state", "source": "jump-bottom", "previousMode": "manual", "mode": "tail-follow", "atBottom": true, "scrollable": true, "tailCommand": true}, |
| 47 | map[string]any{"t": 1200, "type": "stop"}, |
| 48 | }, |
| 49 | } |
| 50 | data, err := json.Marshal(payload) |
| 51 | if err != nil { |
| 52 | t.Fatal(err) |
| 53 | } |
| 54 | return string(data) |
| 55 | } |
| 56 | |
| 57 | func TestBuildScrollDiagnosticsZip(t *testing.T) { |
| 58 | t.Parallel() |
| 59 | data, err := buildScrollDiagnosticsZip(validScrollDiagnosticsPayload(t)) |
| 60 | if err != nil { |
| 61 | t.Fatalf("build diagnostic zip: %v", err) |
| 62 | } |
| 63 | |
| 64 | zr, err := zip.NewReader(bytes.NewReader(data), int64(len(data))) |
| 65 | if err != nil { |
| 66 | t.Fatalf("open diagnostic zip: %v", err) |
| 67 | } |
| 68 | wantNames := []string{"manifest.json", "summary.json", "scroll-events.jsonl", "sha256.txt"} |
| 69 | if len(zr.File) != len(wantNames) { |
| 70 | t.Fatalf("zip entries = %d, want %d", len(zr.File), len(wantNames)) |
| 71 | } |
| 72 | for i, file := range zr.File { |
| 73 | if file.Name != wantNames[i] { |
| 74 | t.Fatalf("zip entry %d = %q, want %q", i, file.Name, wantNames[i]) |
| 75 | } |
| 76 | if strings.Contains(file.Name, "..") || strings.HasPrefix(file.Name, "/") { |
| 77 | t.Fatalf("unsafe zip entry %q", file.Name) |
| 78 | } |
| 79 | } |
| 80 | |
| 81 | eventsFile := zr.File[2] |
| 82 | r, err := eventsFile.Open() |
| 83 | if err != nil { |
| 84 | t.Fatal(err) |
| 85 | } |
| 86 | events, err := io.ReadAll(r) |
| 87 | _ = r.Close() |
| 88 | if err != nil { |
| 89 | t.Fatal(err) |
| 90 | } |
| 91 | lines := strings.Split(strings.TrimSpace(string(events)), "\n") |
| 92 | if len(lines) != 5 { |
| 93 | t.Fatalf("event lines = %d, want 5", len(lines)) |
| 94 | } |
| 95 | if !strings.Contains(lines[1], `"type":"row-measure"`) || strings.Contains(lines[1], "rowKey") { |
| 96 | t.Fatalf("second event = %q, want privacy-safe row measurement", lines[1]) |
| 97 | } |
| 98 | if !strings.Contains(lines[2], `"type":"mark"`) { |
| 99 | t.Fatalf("third event = %q, want mark", lines[2]) |
| 100 | } |
| 101 | |
| 102 | checksumReader, err := zr.File[3].Open() |
| 103 | if err != nil { |
| 104 | t.Fatal(err) |
| 105 | } |
| 106 | checksum, err := io.ReadAll(checksumReader) |
| 107 | _ = checksumReader.Close() |
| 108 | if err != nil { |
| 109 | t.Fatal(err) |
| 110 | } |
| 111 | digest := sha256.Sum256(events) |
| 112 | wantChecksum := fmt.Sprintf("%x scroll-events.jsonl", digest) |
| 113 | if strings.TrimSpace(string(checksum)) != wantChecksum { |
| 114 | t.Fatalf("event checksum = %q, want %q", strings.TrimSpace(string(checksum)), wantChecksum) |
| 115 | } |
| 116 | } |
| 117 | |
| 118 | func TestBuildScrollDiagnosticsZipRejectsUnsafePayloads(t *testing.T) { |
| 119 | t.Parallel() |
| 120 | tests := []struct { |
| 121 | name string |
| 122 | mutate func(map[string]any) |
| 123 | }{ |
| 124 | { |
| 125 | name: "old schema version", |
| 126 | mutate: func(payload map[string]any) { |
| 127 | payload["schemaVersion"] = 1 |
| 128 | }, |
| 129 | }, |
| 130 | { |
| 131 | name: "unknown content field", |
| 132 | mutate: func(payload map[string]any) { |
| 133 | payload["transcriptText"] = "PRIVATE_TRANSCRIPT_CANARY" |
| 134 | }, |
| 135 | }, |
| 136 | { |
| 137 | name: "unknown event field", |
| 138 | mutate: func(payload map[string]any) { |
| 139 | events := payload["events"].([]any) |
| 140 | events[0].(map[string]any)["rowKey"] = "raw-row-key" |
| 141 | }, |
| 142 | }, |
| 143 | { |
| 144 | name: "row measurement leaks row key", |
| 145 | mutate: func(payload map[string]any) { |
| 146 | events := payload["events"].([]any) |
| 147 | events[1].(map[string]any)["rowKey"] = "raw-row-key" |
| 148 | }, |
| 149 | }, |
| 150 | { |
| 151 | name: "invalid report id", |
| 152 | mutate: func(payload map[string]any) { |
| 153 | payload["manifest"].(map[string]any)["reportId"] = "C:\\Users\\private" |
| 154 | }, |
| 155 | }, |
| 156 | { |
| 157 | name: "too many events", |
| 158 | mutate: func(payload map[string]any) { |
| 159 | events := make([]any, maxScrollDiagnosticEvents+1) |
| 160 | for i := range events { |
| 161 | events[i] = map[string]any{"t": i, "type": "scroll"} |
| 162 | } |
| 163 | payload["events"] = events |
| 164 | payload["summary"].(map[string]any)["eventCount"] = len(events) |
| 165 | }, |
| 166 | }, |
| 167 | } |
| 168 | |
| 169 | for _, test := range tests { |
| 170 | t.Run(test.name, func(t *testing.T) { |
| 171 | var payload map[string]any |
| 172 | if err := json.Unmarshal([]byte(validScrollDiagnosticsPayload(t)), &payload); err != nil { |
| 173 | t.Fatal(err) |
| 174 | } |
| 175 | test.mutate(payload) |
| 176 | data, err := json.Marshal(payload) |
| 177 | if err != nil { |
| 178 | t.Fatal(err) |
| 179 | } |
| 180 | if _, err := buildScrollDiagnosticsZip(string(data)); err == nil { |
| 181 | t.Fatal("expected unsafe payload to be rejected") |
| 182 | } else if strings.Contains(err.Error(), "PRIVATE_TRANSCRIPT_CANARY") || strings.Contains(err.Error(), "private") { |
| 183 | t.Fatalf("validation error exposed payload content: %q", err) |
| 184 | } |
| 185 | }) |
| 186 | } |
| 187 | } |
| 188 |