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
|
import { assert, assertEquals, assertThrows } from "../testing/asserts.ts";
import Buffer from "./buffer.ts";
Deno.test({
name: "alloc fails on negative numbers",
fn() {
assertThrows(
() => {
Buffer.alloc(-1);
},
RangeError,
"Invalid typed array length: -1",
"should throw on negative numbers"
);
},
});
Deno.test({
name: "alloc allocates a buffer with the expected size",
fn() {
const buffer: Buffer = Buffer.alloc(1);
assertEquals(buffer.length, 1, "Buffer size should be 1");
assertEquals(buffer[0], 0, "Content should be filled with 0");
},
});
Deno.test({
name: "alloc(0) creates an empty buffer",
fn() {
const buffer: Buffer = Buffer.alloc(0);
assertEquals(buffer.length, 0, "Buffer size should be 0");
},
});
Deno.test({
name: "Byte length is the expected for strings",
fn() {
assertEquals(Buffer.byteLength("test"), 4, "Byte lenght differs on string");
},
});
Deno.test({
name: "Byte length is the expected one for non-strings",
fn() {
assertEquals(
Buffer.byteLength(Buffer.alloc(0)),
Buffer.alloc(0).byteLength,
"Byte lenght differs on buffers"
);
},
});
Deno.test({
name: "Two Buffers are concatenated",
fn() {
const buffer1 = Buffer.alloc(1);
const buffer2 = Buffer.alloc(2);
const resultBuffer = Buffer.concat([buffer1, buffer2]);
assertEquals(resultBuffer.length, 3, "Buffer length should be 3");
},
});
Deno.test({
name: "A single buffer concatenates and return the same buffer",
fn() {
const buffer1 = Buffer.alloc(1);
const resultBuffer = Buffer.concat([buffer1]);
assertEquals(resultBuffer.length, 1, "Buffer length should be 1");
},
});
Deno.test({
name: "No buffers concat returns an empty buffer",
fn() {
const resultBuffer = Buffer.concat([]);
assertEquals(resultBuffer.length, 0, "Buffer length should be 0");
},
});
Deno.test({
name: "concat respects totalLenght parameter",
fn() {
const buffer1 = Buffer.alloc(2);
const buffer2 = Buffer.alloc(2);
const resultBuffer = Buffer.concat([buffer1, buffer2], 10);
assertEquals(resultBuffer.length, 10, "Buffer length should be 10");
},
});
Deno.test({
name: "concat totalLenght throws if is lower than the size of the buffers",
fn() {
const buffer1 = Buffer.alloc(2);
const buffer2 = Buffer.alloc(2);
assertThrows(
() => {
Buffer.concat([buffer1, buffer2], 3);
},
RangeError,
"offset is out of bounds",
"should throw on negative numbers"
);
},
});
Deno.test({
name: "Buffer from string creates a Buffer",
fn() {
const buffer: Buffer = Buffer.from("test");
assertEquals(buffer.length, 4, "Buffer length should be 4");
assertEquals(
buffer.toString(),
"test",
"Buffer to string should recover the string"
);
},
});
Deno.test({
name: "Buffer from another buffer creates a Buffer",
fn() {
const buffer: Buffer = Buffer.from(Buffer.from("test"));
assertEquals(buffer.length, 4, "Buffer length should be 4");
assertEquals(
buffer.toString(),
"test",
"Buffer to string should recover the string"
);
},
});
Deno.test({
name: "isBuffer returns true if the object is a buffer",
fn() {
assert(Buffer.isBuffer(Buffer.from("test")));
},
});
Deno.test({
name: "isBuffer returns false if the object is not a buffer",
fn() {
assert(!Buffer.isBuffer({ test: 3 }));
},
});
|
