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
|
// Test the promise property on async generator function frames.
load(libdir + 'asserts.js');
var g = newGlobal({ newCompartment: true });
var dbg = Debugger(g);
g.eval(`
async function* f() {
debugger;
yield 42;
debugger;
return 50
}
`);
let frame;
const promises = [];
dbg.onEnterFrame = function(f) {
frame = f;
promises.push(["enter", frame.asyncPromise]);
frame.onPop = function() {
promises.push(["leave", frame.asyncPromise]);
};
dbg.onDebuggerStatement = function(f) {
assertEq(f, frame);
promises.push(["dbg", frame.asyncPromise]);
};
};
(async () => {
const it = g.f();
// Promise is null until initial iteration.
assertEq(frame.asyncPromise, null);
assertEq(promises.length, 2);
assertEq(promises[0][0], "enter");
assertEq(promises[0][1], null);
assertEq(promises[1][0], "leave");
assertEq(promises[1][1], null);
const result1Promise = it.next();
const frameIt1Promise = frame.asyncPromise;
assertEq(frameIt1Promise instanceof Debugger.Object, true);
assertEq(frameIt1Promise.unsafeDereference(), result1Promise);
assertEq(promises.length, 5);
assertEq(promises[2][0], "enter");
assertEq(promises[2][1], frameIt1Promise);
assertEq(promises[3][0], "dbg");
assertEq(promises[3][1], frameIt1Promise);
assertEq(promises[4][0], "leave");
assertEq(promises[4][1], frameIt1Promise);
await result1Promise;
// Iteration step has fully completed, so promise state has been cleared.
assertEq(frame.asyncPromise, null);
assertEq(promises.length, 7);
assertEq(promises[5][0], "enter");
assertEq(promises[5][1], frameIt1Promise);
assertEq(promises[6][0], "leave");
assertEq(promises[6][1], frameIt1Promise);
const result2Promise = it.next();
const frameIt2Promise = frame.asyncPromise;
assertEq(frameIt2Promise instanceof Debugger.Object, true);
assertEq(frameIt2Promise.unsafeDereference(), result2Promise);
assertEq(frameIt1Promise !== frameIt2Promise, true);
assertEq(promises.length, 10);
assertEq(promises[7][0], "enter");
assertEq(promises[7][1], frameIt2Promise);
assertEq(promises[8][0], "dbg");
assertEq(promises[8][1], frameIt2Promise);
assertEq(promises[9][0], "leave");
assertEq(promises[9][1], frameIt2Promise);
await result2Promise;
// Frame has terminated, so accessing the property throws.
assertThrowsInstanceOf(() => frame.asyncPromise, Error);
assertEq(promises.length, 12);
assertEq(promises[10][0], "enter");
assertEq(promises[10][1], frameIt2Promise);
assertEq(promises[11][0], "leave");
assertEq(promises[11][1], frameIt2Promise);
})();
|
