deno.land / std@0.166.0 / streams / buffer_test.ts

buffer_test.ts
نووسراو ببینە
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
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
import { assert, assertEquals, assertRejects, assertThrows,} from "../testing/asserts.ts";import { Buffer, ByteSliceStream, LimitedBytesTransformStream, LimitedTransformStream,} from "./buffer.ts";
Deno.test("[streams] Buffer Write & Read", async function () { const buf = new Buffer(); const writer = buf.writable.getWriter(); const reader = buf.readable.getReader({ mode: "byob" }); const data = new Uint8Array([4, 21, 45, 19]); await writer.write(data); const read = await reader.read(new Uint8Array(4)); assertEquals(read.value, data);});
Deno.test("[streams] Buffer Read empty", async function () { const buf = new Buffer(); const reader = buf.readable.getReader({ mode: "byob" }); const read = await reader.read(new Uint8Array(5)); assert(read.done); assertEquals(read.value!.byteLength, 0);});
Deno.test("[streams] Buffer Write & get bytes", async function () { const buf = new Buffer(); const writer = buf.writable.getWriter(); const data = new Uint8Array([4, 21, 45, 19]); await writer.write(data); assertEquals(buf.bytes(), data);});
Deno.test("[streams] Buffer truncate", async function () { const buf = new Buffer(); const writer = buf.writable.getWriter(); await writer.write(new Uint8Array([4, 21, 45, 19])); buf.truncate(3); assertEquals(buf.bytes(), new Uint8Array([4, 21, 45]));});
Deno.test("[streams] LimitedBytesTransformStream", async function () { const r = new ReadableStream({ start(controller) { controller.enqueue(new Uint8Array([1, 2, 3])); controller.enqueue(new Uint8Array([4, 5, 6])); controller.enqueue(new Uint8Array([7, 8, 9])); controller.enqueue(new Uint8Array([10, 11, 12])); controller.enqueue(new Uint8Array([13, 14, 15])); controller.enqueue(new Uint8Array([16, 17, 18])); controller.close(); }, });
const chunks = []; for await (const chunk of r.pipeThrough(new LimitedBytesTransformStream(7))) { chunks.push(chunk); } assertEquals(chunks.length, 2);});
Deno.test("[streams] LimitedBytesTransformStream error", async function () { const r = new ReadableStream({ start(controller) { controller.enqueue(new Uint8Array([1, 2, 3])); controller.enqueue(new Uint8Array([4, 5, 6])); controller.enqueue(new Uint8Array([7, 8, 9])); controller.enqueue(new Uint8Array([10, 11, 12])); controller.enqueue(new Uint8Array([13, 14, 15])); controller.enqueue(new Uint8Array([16, 17, 18])); controller.close(); }, });
await assertRejects(async () => { for await ( const _chunk of r.pipeThrough( new LimitedBytesTransformStream(7, { error: true }), ) ) { // needed to read } }, RangeError);});
Deno.test("[streams] LimitedTransformStream", async function () { const r = new ReadableStream({ start(controller) { controller.enqueue("foo"); controller.enqueue("foo"); controller.enqueue("foo"); controller.enqueue("foo"); controller.enqueue("foo"); controller.enqueue("foo"); controller.close(); }, });
const chunks = []; for await (const chunk of r.pipeThrough(new LimitedTransformStream(3))) { chunks.push(chunk); } assertEquals(chunks.length, 3);});
Deno.test("[streams] LimitedTransformStream error", async function () { const r = new ReadableStream({ start(controller) { controller.enqueue("foo"); controller.enqueue("foo"); controller.enqueue("foo"); controller.enqueue("foo"); controller.enqueue("foo"); controller.enqueue("foo"); controller.close(); }, });
await assertRejects(async () => { for await ( const _chunk of r.pipeThrough( new LimitedTransformStream(3, { error: true }), ) ) { // needed to read } }, RangeError);});
Deno.test("[streams] ByteSliceStream", async function () { function createStream(start = 0, end = Infinity) { return new ReadableStream({ start(controller) { controller.enqueue(new Uint8Array([0, 1])); controller.enqueue(new Uint8Array([2, 3])); controller.close(); }, }).pipeThrough(new ByteSliceStream(start, end)); }
let chunks = [];
for await (const chunk of createStream(0, 3)) { chunks.push(chunk); } assertEquals(chunks, [ new Uint8Array([0, 1]), new Uint8Array([2, 3]), ]);
chunks = []; for await (const chunk of createStream(0, 1)) { chunks.push(chunk); } assertEquals(chunks, [ new Uint8Array([0, 1]), ]);
chunks = []; for await (const chunk of createStream(0, 2)) { chunks.push(chunk); } assertEquals(chunks, [ new Uint8Array([0, 1]), new Uint8Array([2]), ]);
chunks = []; for await (const chunk of createStream(0, 3)) { chunks.push(chunk); } assertEquals(chunks, [ new Uint8Array([0, 1]), new Uint8Array([2, 3]), ]);
chunks = []; for await (const chunk of createStream(1, 3)) { chunks.push(chunk); } assertEquals(chunks, [ new Uint8Array([1]), new Uint8Array([2, 3]), ]);
chunks = []; for await (const chunk of createStream(2, 3)) { chunks.push(chunk); } assertEquals(chunks, [ new Uint8Array([2, 3]), ]);
chunks = []; for await (const chunk of createStream(0, 10)) { chunks.push(chunk); } assertEquals(chunks, [ new Uint8Array([0, 1]), new Uint8Array([2, 3]), ]);
assertThrows(() => createStream(-1, Infinity));});
std
Deno standard library
GitHub Repositorydenoland/deno_std
GitHub Stars
2458

Version Info

Tagged at
2 months ago