/
reduce_groups_test.ts
117 lines (107 loc) · 2.08 KB
/
reduce_groups_test.ts
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
// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
import { assertEquals } from "../testing/asserts.ts";
import { reduceGroups } from "./reduce_groups.ts";
function reduceGroupsTest<T, A>(
input: [Record<string, Array<T>>, (accumulator: A, current: T) => A, A],
expected: Record<string, A>,
message?: string,
) {
const actual = reduceGroups(...input);
assertEquals(actual, expected, message);
}
Deno.test({
name: "[collections/mapEntries] no mutation",
fn() {
const input = {
Woody: [2, 3, 1, 4],
Buzz: [5, 9],
};
reduceGroups(input, (sum, it) => sum + it, 0);
assertEquals(input, {
Woody: [2, 3, 1, 4],
Buzz: [5, 9],
});
},
});
Deno.test({
name: "[collections/mapEntries] array of numbers",
fn() {
reduceGroupsTest(
[
{
Woody: [2, 3, 1, 4],
Buzz: [5, 9],
},
(sum, it) => sum + it,
0,
],
{
Woody: 10,
Buzz: 14,
},
);
},
});
Deno.test({
name: "[collections/mapEntries] array of string",
fn() {
reduceGroupsTest(
[
{
Woody: ["foo", "bar"],
Buzz: ["foo", "bar", "baz"],
},
(sum, it) => sum + it + " ",
"",
],
{
Woody: "foo bar ",
Buzz: "foo bar baz ",
},
);
},
});
Deno.test({
name: "[collections/mapEntries] mapper",
fn() {
reduceGroupsTest(
[
{
Woody: [{ val: 14 }, { val: 24 }],
Buzz: [{ val: 1 }, { val: 2 }, { val: 3 }, { val: 4 }],
},
(sum, it) => sum + it.val,
0,
],
{
Woody: 38,
Buzz: 10,
},
);
},
});
Deno.test({
name: "[collections/mapEntries] initial value",
fn() {
reduceGroupsTest(
[
{
Woody: [],
Buzz: [],
},
(sum, it) => sum + it,
24,
],
{
Woody: 24,
Buzz: 24,
},
);
},
});
Deno.test({
name: "[collections/mapEntries] empty input",
fn() {
reduceGroupsTest([{}, () => 0, 0], {});
},
});