generated from garronej/ts-ci
-
Notifications
You must be signed in to change notification settings - Fork 6
/
Extends.ts
139 lines (116 loc) · 4.78 KB
/
Extends.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
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
/* eslint-disable @typescript-eslint/no-explicit-any */
import type { Equals } from "../Equals.ts";
import type { Extends } from "../Extends.ts";
import { assert } from "../assert.ts";
const emptyObj = {};
type EmptyObj = typeof emptyObj;
type Fn<A extends any[] = any[], R = any> = (...args: A) => R;
type Obj = Record<string, unknown>;
function fn() {
return undefined;
}
class A {
a = 1;
}
{
// identity
assert<Equals<Extends<any, any>, true>>();
assert<Equals<Extends<never, never>, true>>();
assert<Equals<Extends<unknown, unknown>, true>>();
assert<Equals<Extends<void, void>, true>>();
assert<Equals<Extends<undefined, undefined>, true>>();
assert<Equals<Extends<null, null>, true>>();
assert<Equals<Extends<boolean, boolean>, true>>();
assert<Equals<Extends<number, number>, true>>();
assert<Equals<Extends<string, string>, true>>();
assert<Equals<Extends<symbol, symbol>, true>>();
assert<Equals<Extends<any[], any[]>, true>>();
assert<Equals<Extends<Fn, Fn>, true>>();
assert<Equals<Extends<Obj, Obj>, true>>();
assert<Equals<Extends<A, A>, true>>();
}
{
// never extends everything
assert<Equals<Extends<never, never>, true>>();
assert<Equals<Extends<never, any>, true>>();
assert<Equals<Extends<never, unknown>, true>>();
assert<Equals<Extends<never, 1>, true>>();
// nothing but itself extends never
assert<Equals<Extends<never, never>, true>>();
assert<Equals<Extends<any, never>, false>>();
assert<Equals<Extends<unknown, never>, false>>();
assert<Equals<Extends<1, never>, false>>();
// any extends nothing but itself and unknown
assert<Equals<Extends<any, any>, true>>();
assert<Equals<Extends<any, never>, false>>();
assert<Equals<Extends<any, unknown>, true>>();
assert<Equals<Extends<any, 1>, false>>();
// unknown extends nothing but itself and any
assert<Equals<Extends<unknown, unknown>, true>>();
assert<Equals<Extends<unknown, never>, false>>();
assert<Equals<Extends<unknown, any>, true>>();
assert<Equals<Extends<unknown, 1>, false>>();
// everything extends any
assert<Equals<Extends<never, any>, true>>();
assert<Equals<Extends<unknown, any>, true>>();
assert<Equals<Extends<1, any>, true>>();
// everything extends unknown
assert<Equals<Extends<any, unknown>, true>>();
assert<Equals<Extends<never, unknown>, true>>();
assert<Equals<Extends<1, unknown>, true>>();
}
{
// numbers
assert<Equals<Extends<1, number>, true>>();
assert<Equals<Extends<number, 1>, false>>();
}
{
// functions
assert<Equals<Extends<() => any, Fn>, true>>();
assert<Equals<Extends<() => void, Fn>, true>>();
assert<Equals<Extends<(...args: any[]) => any, Fn>, true>>();
assert<Equals<Extends<typeof fn, Fn>, true>>();
assert<Equals<Extends<unknown, Fn>, false>>();
assert<Equals<Extends<void, Fn>, false>>();
assert<Equals<Extends<undefined, Fn>, false>>();
assert<Equals<Extends<null, Fn>, false>>();
assert<Equals<Extends<boolean, Fn>, false>>();
assert<Equals<Extends<number, Fn>, false>>();
assert<Equals<Extends<string, Fn>, false>>();
assert<Equals<Extends<any[], Fn>, false>>();
assert<Equals<Extends<Record<string, unknown>, Fn>, false>>();
assert<Equals<Extends<A, Fn>, false>>();
}
{
// arrays
assert<Equals<Extends<any[], any[]>, true>>();
assert<Equals<Extends<[], []>, true>>();
assert<Equals<Extends<any[], []>, false>>();
assert<Equals<Extends<[], any[]>, true>>();
assert<Equals<Extends<[], [any]>, false>>();
assert<Equals<Extends<[any], any[]>, true>>();
assert<Equals<Extends<[any], []>, false>>();
assert<Equals<Extends<[1], [number]>, true>>();
assert<Equals<Extends<[number], [1]>, false>>();
assert<Equals<Extends<[1], [1]>, true>>();
assert<Equals<Extends<[1], [2]>, false>>();
assert<Equals<Extends<[1, ""], [number, string]>, true>>();
assert<Equals<Extends<[1, ""], [number, any]>, true>>();
assert<Equals<Extends<[1, ""], [number, never]>, false>>();
assert<Equals<Extends<[number, string], [1, ""]>, false>>();
assert<Equals<Extends<[number, any], [1, ""]>, false>>();
assert<Equals<Extends<[number, never], [1, ""]>, false>>();
}
{
// objects
assert<Equals<Extends<A, EmptyObj>, true>>();
assert<Equals<Extends<EmptyObj, A>, false>>();
assert<Equals<Extends<A, Record<string, any>>, true>>();
assert<Equals<Extends<Record<string, any>, A>, false>>();
assert<Equals<Extends<A, unknown>, true>>();
assert<Equals<Extends<unknown, A>, false>>();
assert<Equals<Extends<EmptyObj, { a: 1 }>, false>>();
assert<Equals<Extends<{ a: 1 }, EmptyObj>, true>>();
assert<Equals<Extends<{ a: 1 }, { a: number }>, true>>();
assert<Equals<Extends<{ a: 1 }, { a: string }>, false>>();
}