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Test Info:
- Manifest: js/xpconnect/tests/unit/xpcshell.toml
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, {
});
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, {
});
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, {
});
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, {
});
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);
});