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
// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
import { assertEquals } from "../testing/asserts.ts";import { zip } from "./zip.ts";
function zip1Test<T>(  input: [Array<T>],  expected: Array<[T]>,  message?: string,) {  const actual = zip(...input);  assertEquals(actual, expected, message);}
assertEquals(zip([]), []);
Deno.test({  name: "[collections/zip] Correctly zips one array",  fn() {    zip1Test([      [1, 2, 3],    ], [[1], [2], [3]]);  },});
function zipTest<T, U>(  input: [Array<T>, Array<U>],  expected: Array<[T, U]>,  message?: string,) {  const actual = zip(...input);  assertEquals(actual, expected, message);}
function zip3Test<T, U, V>(  input: [Array<T>, Array<U>, Array<V>],  expected: Array<[T, U, V]>,  message?: string,) {  const actual = zip(...input);  assertEquals(actual, expected, message);}
Deno.test({  name: "[collections/zip] Correctly zips three arrays",  fn() {    zip3Test([      [1, 2, 3],      [4, 5, 6],      [7, 8, 9],    ], [[1, 4, 7], [2, 5, 8], [3, 6, 9]]);  },});
Deno.test({  name:    "[collections/zip] Correctly zips three arrays when the first is the shortest",  fn() {    zip3Test([      [1, 2],      [4, 5, 6],      [7, 8, 9],    ], [[1, 4, 7], [2, 5, 8]]);  },});
Deno.test({  name: "[collections/zip] no mutation",  fn() {    const arrayA = [1, 4, 5];    const arrayB = ["foo", "bar"];    zip(arrayA, arrayB);
    assertEquals(arrayA, [1, 4, 5]);    assertEquals(arrayB, ["foo", "bar"]);  },});
Deno.test({  name: "[collections/zip] empty input",  fn() {    zipTest(      [[], []],      [],    );    zipTest(      [[1, 2, 3], []],      [],    );    zipTest(      [[], [{}, []]],      [],    );  },});
Deno.test({  name: "[collections/zip] same length",  fn() {    zipTest(      [        [1, 4, 5],        ["foo", "bar", "lorem"],      ],      [        [1, "foo"],        [4, "bar"],        [5, "lorem"],      ],    );    zipTest(      [        [2.2, false],        ["test", true],      ],      [        [2.2, "test"],        [false, true],      ],    );  },});
Deno.test({  name: "[collections/zip] first shorter",  fn() {    zipTest(      [        [1],        ["foo", "bar", "lorem"],      ],      [[1, "foo"]],    );    zipTest(      [        [2.2, false],        ["test", true, {}],      ],      [        [2.2, "test"],        [false, true],      ],    );  },});
Deno.test({  name: "[collections/zip] second shorter",  fn() {    zipTest(      [        [1, 4, 5],        ["foo"],      ],      [[1, "foo"]],    );    zipTest(      [        [2.2, false, "test"],        ["test", true],      ],      [        [2.2, "test"],        [false, true],      ],    );  },});