-
Notifications
You must be signed in to change notification settings - Fork 1
/
cancellable.test.ts
133 lines (114 loc) · 4.06 KB
/
cancellable.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
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
import { cancellable } from './cancellable';
describe('2650. Design Cancellable Function', () => {
test('Example 1', async() => {
const generatorFunction = function* () {
return 42;
};
const cancelledAt = 100;
const generator = generatorFunction();
let t = Date.now();
const [ cancel, promise ] = cancellable(generator);
setTimeout(cancel, cancelledAt);
promise.then((data) => {
// resolves 42 at t=0ms
expect(data).toBe(42);
expect(Date.now() - t).toBeLessThan(10);
});
});
test('Example 2', async() => {
const generatorFunction = function* () {
// @ts-ignore
const msg = yield new Promise(res => res('Hello'));
throw `Error: ${msg}`;
};
const generator = generatorFunction();
let t = Date.now();
const [ cancel, promise ] = cancellable(generator);
setTimeout(cancel);
promise.then((data) => {
expect(data).toEqual({ 'rejected': 'Error: Hello' });
expect(Date.now() - t).toBe(0);
});
});
test('Example 3', async() => {
const generatorFunction = function* () {
yield new Promise(res => setTimeout(res, 200));
return 'Success';
};
const cancelledAt = 100;
const generator = generatorFunction();
let t = Date.now();
const [ cancel, promise ] = cancellable(generator);
setTimeout(cancel, cancelledAt);
promise.then((data) => {
expect(data).toEqual({ 'rejected': 'Cancelled' });
expect(Date.now() - t).toBe(100);
});
});
test('Example 4', async() => {
const generatorFunction = function* () {
let result = 0;
yield new Promise(res => setTimeout(res, 100));
// @ts-ignore
result += yield new Promise(res => res(1));
yield new Promise(res => setTimeout(res, 100));
// @ts-ignore
result += yield new Promise(res => res(1));
return result;
};
const generator = generatorFunction();
let t = Date.now();
const [ cancel, promise ] = cancellable(generator);
setTimeout(cancel);
promise.then((data) => {
expect(data).toEqual({ 'resolved': 2 });
expect(Date.now() - t).toBe(200);
});
});
test('Example 5', async() => {
const generatorFunction = function* () {
let result = 0;
try {
yield new Promise(res => setTimeout(res, 100));
// @ts-ignore
result += yield new Promise(res => res(1));
yield new Promise(res => setTimeout(res, 100));
// @ts-ignore
result += yield new Promise(res => res(1));
} catch(e) {
return result;
}
return result;
};
const cancelledAt = 150;
const generator = generatorFunction();
let t = Date.now();
const [ cancel, promise ] = cancellable(generator);
setTimeout(cancel, cancelledAt);
promise.then((data) => {
expect(data).toEqual({ 'resolved': 1 });
expect(Date.now() - t).toBe(150);
});
});
test('Example 6', async() => {
const generatorFunction = function* () {
try {
yield new Promise((_resolve, reject) => reject('Promise Rejected'));
} catch(e) {
// @ts-ignore
let a = yield new Promise(resolve => resolve(2));
// @ts-ignore
let b = yield new Promise(resolve => resolve(2));
return a + b;
}
};
const generator = generatorFunction();
let t = Date.now();
const [ cancel, promise ] = cancellable(generator);
setTimeout(cancel);
promise.then((data) => {
expect(data).toEqual({ 'resolved': 4 });
expect(Date.now() - t).toBe(150);
});
});
});