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
import { limitInvocations, once } from "./invoke.ts";import { assertEquals, assertThrows } from "testing/asserts.ts";
Deno.test("once", () => {  once(() => {});  once(    () => {},    // @ts-expect-error    (_arg) => {},  );  once(    () => {},    () => {},  );  // @ts-expect-error  once(() => 0);  once(    () => 0,    () => 0,  );  once(    () => 0,    // @ts-expect-error    () => "",  );  once(    () => 0,    // @ts-expect-error    async () => 0,  );
  once(async () => {});  // @ts-expect-error  once(async () => 0);  once(    async () => 0,    async () => 0,  );  once(    async () => 0,    () => 0,  );
  // @ts-expect-error  once((_n: number) => {})();  once((_n: number) => {})(1);  // @ts-expect-error  once((_n: number) => {})(1, 2);  // @ts-expect-error  once((_a: number, _b: strin) => {})(1);  once((_a: number, _b: string) => {})(1, "a");
  const _rn: number = once(    () => 1,    () => 2,  )();  // @ts-expect-error  const _rs: string = once(    () => 1,    () => 2,  )();
  {    const f = once(      () => 1,      () => 2,    );    assertEquals(f(), 1);    assertEquals(f(), 2);    assertEquals(f(), 2);  }});
Deno.test("limit", () => {  const f = limitInvocations(    () => "a",    2,    () => "b",  );  assertEquals(f(), "a");  assertEquals(f(), "a");  assertEquals(f(), "b");
  const f3 = limitInvocations(    () => 0,    3,    () => {      throw Error("4th invoke");    },  );  assertEquals(f3(), 0);  assertEquals(f3(), 0);  assertEquals(f3(), 0);  assertThrows(() => f3(), Error, "4th invoke");});