1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.import { assertEquals, assertRejects } from "../assert/mod.ts";import {  type ServerSentEventMessage,  ServerSentEventStream,} from "./server_sent_event_stream.ts";
function createStream(  messages: ServerSentEventMessage[],): ReadableStream<string> {  return ReadableStream    .from<ServerSentEventMessage>(messages)    .pipeThrough(new ServerSentEventStream())    .pipeThrough(new TextDecoderStream());}
Deno.test("ServerSentEventStream enqueues a stringified server-sent event message object", async () => {  const stream = createStream([    {      comment: "a",      event: "b",      data: "c\nd\re\r\nf",      id: "123",      retry: 456,    },    {      comment: "a",    },    {      event: "b",    },    {      data: "c\nd\re\r\nf",    },    {      id: "123",    },    {      id: 123,    },    {      retry: 456,    },  ]);  const clientMessages = await Array.fromAsync(stream);
  assertEquals(    clientMessages,    [      ":a\nevent:b\ndata:c\ndata:d\ndata:e\ndata:f\nid:123\nretry:456\n\n",      ":a\n\n",      "event:b\n\n",      "data:c\ndata:d\ndata:e\ndata:f\n\n",      "id:123\n\n",      "id:123\n\n",      "retry:456\n\n",    ],  );});
Deno.test("ServerSentEventStream throws if single-line fields contain a newline", async () => {  // Comment  await assertRejects(    async () => await createStream([{ comment: "a\n" }]).getReader().read(),    RangeError,    "`message.comment` cannot contain a newline",  );
  await assertRejects(    async () => await createStream([{ comment: "a\r" }]).getReader().read(),    RangeError,    "`message.comment` cannot contain a newline",  );
  await assertRejects(    async () => await createStream([{ comment: "a\n\r" }]).getReader().read(),    RangeError,    "`message.comment` cannot contain a newline",  );
  // Event  await assertRejects(    async () => await createStream([{ event: "a\n" }]).getReader().read(),    RangeError,    "`message.event` cannot contain a newline",  );
  await assertRejects(    async () => await createStream([{ event: "a\r" }]).getReader().read(),    RangeError,    "`message.event` cannot contain a newline",  );
  await assertRejects(    async () => await createStream([{ event: "a\n\r" }]).getReader().read(),    RangeError,    "`message.event` cannot contain a newline",  );
  // ID  await assertRejects(    async () => await createStream([{ id: "a\n" }]).getReader().read(),    RangeError,    "`message.id` cannot contain a newline",  );
  await assertRejects(    async () => await createStream([{ id: "a\r" }]).getReader().read(),    RangeError,    "`message.id` cannot contain a newline",  );
  await assertRejects(    async () => await createStream([{ id: "a\n\r" }]).getReader().read(),    RangeError,    "`message.id` cannot contain a newline",  );});