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