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
|
function assertAccessor(lazy, name) {
let desc = Object.getOwnPropertyDescriptor(lazy, name);
Assert.equal(typeof desc.get, "function");
Assert.equal(desc.get.name, name);
Assert.equal(typeof desc.set, "function");
Assert.equal(desc.set.name, name);
Assert.equal(desc.enumerable, true);
Assert.equal(desc.configurable, true);
}
function assertDataProperty(lazy, name, value) {
let desc = Object.getOwnPropertyDescriptor(lazy, name);
Assert.equal(desc.value, value);
Assert.equal(desc.writable, true);
Assert.equal(desc.enumerable, true);
Assert.equal(desc.configurable, true);
}
add_task(function test_getter() {
// The property should be defined as getter, and getting it should make it
// a data property.
const lazy = {};
ChromeUtils.defineESModuleGetters(lazy, {
X: "resource://test/esm_lazy-1.sys.mjs",
});
assertAccessor(lazy, "X");
Assert.equal(lazy.X, 10);
assertDataProperty(lazy, "X", 10);
});
add_task(function test_setter() {
// Setting the value before the first get should result in a data property.
const lazy = {};
ChromeUtils.defineESModuleGetters(lazy, {
X: "resource://test/esm_lazy-1.sys.mjs",
});
assertAccessor(lazy, "X");
lazy.X = 20;
Assert.equal(lazy.X, 20);
assertDataProperty(lazy, "X", 20);
// The above set shouldn't affect the module's value.
const lazy2 = {};
ChromeUtils.defineESModuleGetters(lazy2, {
X: "resource://test/esm_lazy-1.sys.mjs",
});
Assert.equal(lazy2.X, 10);
});
add_task(function test_order() {
// The change to the exported value should be reflected until it's accessed.
const lazy = {};
ChromeUtils.defineESModuleGetters(lazy, {
Y: "resource://test/esm_lazy-2.sys.mjs",
AddY: "resource://test/esm_lazy-2.sys.mjs",
});
assertAccessor(lazy, "Y");
assertAccessor(lazy, "AddY");
// The change before getting the value should be reflected.
lazy.AddY(2);
Assert.equal(lazy.Y, 22);
assertDataProperty(lazy, "Y", 22);
// Change after getting the value shouldn't be reflected.
lazy.AddY(2);
Assert.equal(lazy.Y, 22);
assertDataProperty(lazy, "Y", 22);
});
|
