`chrome.alarms.getAll()` returns `undefined` instead of array of alarms

[ghost]

chrome.alarms.getAll() should return an array of alarms. However, it is returning undefined using v3.0.1.

const chrome = require("sinon-chrome/extensions");

(async () => {
    let alarms = await chrome.alarms.getAll();
    console.log(alarms); // `undefined`

    await chrome.alarms.create("testAlarm", {
        delayInMinutes: 15
    });

    alarms = await chrome.alarms.getAll();
    console.log(alarms); // `undefined`

    let alarm = await chrome.alarms.get("testAlarm");
    console.log(alarm); // `undefined`
})();

[ghost]

Apologies. I did not realize these were API stubs, not for faking behavior.

[JackZong]

Apologies. I did not realize these were API stubs, not for faking behavior.

so, is that all of the returning should be mocked by self? And all of the returning should be mocked by .returns() ? is it right? thanks