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
// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.import { assertEquals, assertStrictEquals } from "../testing/asserts.ts";import { debounce, DebouncedFunction } from "./debounce.ts";import { delay } from "./delay.ts";
Deno.test("[async] debounce: called", async function () {  let called = 0;  const d = debounce(() => called++, 100);  d();  d();  d();  assertEquals(called, 0);  assertEquals(d.pending, true);  await delay(200);  assertEquals(called, 1);  assertEquals(d.pending, false);});
Deno.test("[async] debounce: canceled", async function () {  let called = 0;  const d = debounce(() => called++, 100);  d();  d();  d();  assertEquals(called, 0);  assertEquals(d.pending, true);  d.clear();  await delay(200);  assertEquals(called, 0);  assertEquals(d.pending, false);});
Deno.test("[async] debounce: flushed", function () {  let called = 0;  const d = debounce(() => called++, 100);  d();  d();  d();  assertEquals(called, 0);  assertEquals(d.pending, true);  d.flush();  assertEquals(called, 1);  assertEquals(d.pending, false);});
Deno.test("[async] debounce: with params & context", async function () {  const params: Array<string | number> = [];  const d: DebouncedFunction<[string, number]> = debounce(    function (param1: string, param2: number) {      assertEquals(d.pending, false);      params.push(param1);      params.push(param2);      assertStrictEquals(d, this);    },    100,  );  // @ts-expect-error Argument of type 'number' is not assignable to parameter of type 'string'.  d(1, 1);  d("foo", 1);  d("bar", 1);  d("baz", 1);  assertEquals(params.length, 0);  assertEquals(d.pending, true);  await delay(200);  assertEquals(params, ["baz", 1]);  assertEquals(d.pending, false);});
Deno.test("[async] debounce: with types", async function () {  const params: Array<string> = [];  const fn = (param: string) => params.push(param);  const d: DebouncedFunction<[string]> = debounce(fn, 100);  // @ts-expect-error Argument of type 'number' is not assignable to parameter of type 'string'.  d(1);  d("foo");  assertEquals(params.length, 0);  assertEquals(d.pending, true);  await delay(200);  assertEquals(params, ["foo"]);  assertEquals(d.pending, false);});