Repository navigation
Expand file tree
/
Copy pathtestability.ts
More file actions
179 lines (155 loc) · 5.03 KB
/
Copy pathtestability.ts
File metadata and controls
179 lines (155 loc) · 5.03 KB
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
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
/**
* @license
* Copyright Google Inc. All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import {Injectable} from '../di';
import {scheduleMicroTask} from '../util';
import {NgZone} from '../zone/ng_zone';
/**
* Testability API.
* `declare` keyword causes tsickle to generate externs, so these methods are
* not renamed by Closure Compiler.
* @experimental
*/
export declare interface PublicTestability {
isStable(): boolean;
whenStable(callback: Function): void;
findProviders(using: any, provider: string, exactMatch: boolean): any[];
}
/**
* The Testability service provides testing hooks that can be accessed from
* the browser and by services such as Protractor. Each bootstrapped Angular
* application on the page will have an instance of Testability.
* @experimental
*/
@Injectable()
export class Testability implements PublicTestability {
/** @internal */
_pendingCount: number = 0;
/** @internal */
_isZoneStable: boolean = true;
/**
* Whether any work was done since the last 'whenStable' callback. This is
* useful to detect if this could have potentially destabilized another
* component while it is stabilizing.
* @internal
*/
_didWork: boolean = false;
/** @internal */
_callbacks: Function[] = [];
constructor(private _ngZone: NgZone) { this._watchAngularEvents(); }
/** @internal */
_watchAngularEvents(): void {
this._ngZone.onUnstable.subscribe({
next: () => {
this._didWork = true;
this._isZoneStable = false;
}
});
this._ngZone.runOutsideAngular(() => {
this._ngZone.onStable.subscribe({
next: () => {
NgZone.assertNotInAngularZone();
scheduleMicroTask(() => {
this._isZoneStable = true;
this._runCallbacksIfReady();
});
}
});
});
}
increasePendingRequestCount(): number {
this._pendingCount += 1;
this._didWork = true;
return this._pendingCount;
}
decreasePendingRequestCount(): number {
this._pendingCount -= 1;
if (this._pendingCount < 0) {
throw new Error('pending async requests below zero');
}
this._runCallbacksIfReady();
return this._pendingCount;
}
isStable(): boolean {
return this._isZoneStable && this._pendingCount == 0 && !this._ngZone.hasPendingMacrotasks;
}
/** @internal */
_runCallbacksIfReady(): void {
if (this.isStable()) {
// Schedules the call backs in a new frame so that it is always async.
scheduleMicroTask(() => {
while (this._callbacks.length !== 0) {
(this._callbacks.pop() !)(this._didWork);
}
this._didWork = false;
});
} else {
// Not Ready
this._didWork = true;
}
}
whenStable(callback: Function): void {
this._callbacks.push(callback);
this._runCallbacksIfReady();
}
getPendingRequestCount(): number { return this._pendingCount; }
/** @deprecated use findProviders */
findBindings(using: any, provider: string, exactMatch: boolean): any[] {
// TODO(juliemr): implement.
return [];
}
findProviders(using: any, provider: string, exactMatch: boolean): any[] {
// TODO(juliemr): implement.
return [];
}
}
/**
* A global registry of {@link Testability} instances for specific elements.
* @experimental
*/
@Injectable()
export class TestabilityRegistry {
/** @internal */
_applications = new Map<any, Testability>();
constructor() { _testabilityGetter.addToWindow(this); }
registerApplication(token: any, testability: Testability) {
this._applications.set(token, testability);
}
getTestability(elem: any): Testability|null { return this._applications.get(elem) || null; }
getAllTestabilities(): Testability[] { return Array.from(this._applications.values()); }
getAllRootElements(): any[] { return Array.from(this._applications.keys()); }
findTestabilityInTree(elem: Node, findInAncestors: boolean = true): Testability|null {
return _testabilityGetter.findTestabilityInTree(this, elem, findInAncestors);
}
}
/**
* Adapter interface for retrieving the `Testability` service associated for a
* particular context.
*
* @experimental Testability apis are primarily intended to be used by e2e test tool vendors like
* the Protractor team.
*/
export interface GetTestability {
addToWindow(registry: TestabilityRegistry): void;
findTestabilityInTree(registry: TestabilityRegistry, elem: any, findInAncestors: boolean):
Testability|null;
}
class _NoopGetTestability implements GetTestability {
addToWindow(registry: TestabilityRegistry): void {}
findTestabilityInTree(registry: TestabilityRegistry, elem: any, findInAncestors: boolean):
Testability|null {
return null;
}
}
/**
* Set the {@link GetTestability} implementation used by the Angular testing framework.
* @experimental
*/
export function setTestabilityGetter(getter: GetTestability): void {
_testabilityGetter = getter;
}
let _testabilityGetter: GetTestability = new _NoopGetTestability();