-
-
Notifications
You must be signed in to change notification settings - Fork 6.5k
/
Copy pathjestMatchersObject.js
103 lines (85 loc) · 2.72 KB
/
jestMatchersObject.js
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
/**
* Copyright (c) 2014-present, Facebook, Inc. 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.
*
* @flow
*/
import {AsymmetricMatcher} from './asymmetricMatchers';
import type {
Expect,
MatchersObject,
SyncExpectationResult,
} from 'types/Matchers';
// Global matchers object holds the list of available matchers and
// the state, that can hold matcher specific values that change over time.
const JEST_MATCHERS_OBJECT = Symbol.for('$$jest-matchers-object');
// Notes a built-in/internal Jest matcher.
// Jest may override the stack trace of Errors thrown by internal matchers.
export const INTERNAL_MATCHER_FLAG = Symbol.for('$$jest-internal-matcher');
if (!global[JEST_MATCHERS_OBJECT]) {
Object.defineProperty(global, JEST_MATCHERS_OBJECT, {
value: {
matchers: Object.create(null),
state: {
assertionCalls: 0,
expectedAssertionsNumber: null,
isExpectingAssertions: false,
suppressedErrors: [], // errors that are not thrown immediately.
},
},
});
}
export const getState = () => global[JEST_MATCHERS_OBJECT].state;
export const setState = (state: Object) => {
Object.assign(global[JEST_MATCHERS_OBJECT].state, state);
};
export const getMatchers = () => global[JEST_MATCHERS_OBJECT].matchers;
export const setMatchers = (
matchers: MatchersObject,
isInternal: boolean,
expect: Expect,
) => {
Object.keys(matchers).forEach(key => {
const matcher = matchers[key];
Object.defineProperty(matcher, INTERNAL_MATCHER_FLAG, {
value: isInternal,
});
if (!isInternal) {
// expect is defined
class CustomMatcher extends AsymmetricMatcher {
sample: Array<any>;
constructor(inverse: boolean = false, ...sample: Array<any>) {
super();
this.inverse = inverse;
this.sample = sample;
}
asymmetricMatch(other: any) {
const {pass} = ((matcher(
(other: any),
...(this.sample: any),
): any): SyncExpectationResult);
return this.inverse ? !pass : pass;
}
toString() {
return `${this.inverse ? 'not.' : ''}${key}`;
}
getExpectedType() {
return 'any';
}
toAsymmetricMatcher() {
return `${this.toString()}<${this.sample.join(', ')}>`;
}
}
expect[key] = (...sample: Array<any>) =>
new CustomMatcher(false, ...sample);
if (!expect.not) {
expect.not = {};
}
expect.not[key] = (...sample: Array<any>) =>
new CustomMatcher(true, ...sample);
}
});
Object.assign(global[JEST_MATCHERS_OBJECT].matchers, matchers);
};