/
index.ts
146 lines (128 loc) · 4.4 KB
/
index.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
140
141
142
143
144
145
146
/**
* Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
import {Script} from 'vm';
import {Global, Config} from '@jest/types';
import {installCommonGlobals} from 'jest-util';
import mock, {ModuleMocker} from 'jest-mock';
import {JestFakeTimers as FakeTimers, LolexFakeTimers} from '@jest/fake-timers';
import {JestEnvironment, EnvironmentContext} from '@jest/environment';
import {JSDOM, VirtualConsole} from 'jsdom';
// The `Window` interface does not have an `Error.stackTraceLimit` property, but
// `JSDOMEnvironment` assumes it is there.
interface Win extends Window {
Error: {
stackTraceLimit: number;
};
}
function isWin(globals: Win | Global.Global): globals is Win {
return (globals as Win).document !== undefined;
}
// A lot of the globals expected by other APIs are `NodeJS.Global` and not
// `Window`, so we need to cast here and there
class JSDOMEnvironment implements JestEnvironment {
dom: JSDOM | null;
fakeTimers: FakeTimers<number> | null;
fakeTimersLolex: LolexFakeTimers | null;
// @ts-ignore
global: Global.Global | Win | null;
errorEventListener: ((event: Event & {error: Error}) => void) | null;
moduleMocker: ModuleMocker | null;
constructor(config: Config.ProjectConfig, options: EnvironmentContext = {}) {
this.dom = new JSDOM('<!DOCTYPE html>', {
pretendToBeVisual: true,
runScripts: 'dangerously',
url: config.testURL,
virtualConsole: new VirtualConsole().sendTo(options.console || console),
...config.testEnvironmentOptions,
});
const global = (this.global = this.dom.window.document.defaultView as Win);
if (!global) {
throw new Error('JSDOM did not return a Window object');
}
// Node's error-message stack size is limited at 10, but it's pretty useful
// to see more than that when a test fails.
this.global.Error.stackTraceLimit = 100;
installCommonGlobals(global as any, config.globals);
// Report uncaught errors.
this.errorEventListener = event => {
if (userErrorListenerCount === 0 && event.error) {
process.emit('uncaughtException', event.error);
}
};
global.addEventListener('error', this.errorEventListener);
// However, don't report them as uncaught if the user listens to 'error' event.
// In that case, we assume the might have custom error handling logic.
const originalAddListener = global.addEventListener;
const originalRemoveListener = global.removeEventListener;
let userErrorListenerCount = 0;
global.addEventListener = function(
...args: Parameters<typeof originalAddListener>
) {
if (args[0] === 'error') {
userErrorListenerCount++;
}
return originalAddListener.apply(this, args);
};
global.removeEventListener = function(
...args: Parameters<typeof originalRemoveListener>
) {
if (args[0] === 'error') {
userErrorListenerCount--;
}
return originalRemoveListener.apply(this, args);
};
this.moduleMocker = new mock.ModuleMocker(global as any);
const timerConfig = {
idToRef: (id: number) => id,
refToId: (ref: number) => ref,
};
this.fakeTimers = new FakeTimers({
config,
global: global as any,
moduleMocker: this.moduleMocker,
timerConfig,
});
this.fakeTimersLolex = new LolexFakeTimers({
config,
global: (global as unknown) as NodeJS.Global,
});
}
setup() {
return Promise.resolve();
}
teardown() {
if (this.fakeTimers) {
this.fakeTimers.dispose();
}
if (this.fakeTimersLolex) {
this.fakeTimersLolex.dispose();
}
if (this.global) {
if (this.errorEventListener && isWin(this.global)) {
this.global.removeEventListener('error', this.errorEventListener);
}
// Dispose "document" to prevent "load" event from triggering.
Object.defineProperty(this.global, 'document', {value: null});
if (isWin(this.global)) {
this.global.close();
}
}
this.errorEventListener = null;
this.global = null;
this.dom = null;
this.fakeTimers = null;
this.fakeTimersLolex = null;
return Promise.resolve();
}
runScript(script: Script) {
if (this.dom) {
return this.dom.runVMScript(script) as any;
}
return null;
}
}
export = JSDOMEnvironment;