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<!doctype html>
<html>
<head>
<meta charset="utf-8" />
<title>PreferencesBindings Setting Tests</title>
<link
rel="stylesheet"
/>
<script
type="application/javascript"
src="chrome://global/content/preferencesBindings.js"
></script>
<script>
/* import-globals-from /toolkit/content/preferencesBindings.js */
function waitForSettingChange(setting) {
return new Promise(resolve => {
setting.on("change", function handler() {
setting.off("change", handler);
resolve();
});
});
}
add_task(async function testSettingSetupAndDestroy() {
const PREF_ID = "test.setting.lifecycle";
const SETTING_ID = "testSettingLifecycle";
await SpecialPowers.pushPrefEnv({
set: [[PREF_ID, false]],
});
Preferences.add({
id: PREF_ID,
type: "bool",
});
let setupCalled = false;
let destroyCalled = false;
function mockTeardown() {
destroyCalled = true;
}
Preferences.addSetting({
id: SETTING_ID,
pref: PREF_ID,
setup(onChange) {
setupCalled = true;
setTimeout(onChange, 0);
return () => {
mockTeardown();
};
},
});
let setting = Preferences.getSetting(SETTING_ID);
ok(setting, "Got setting instance");
ok(setupCalled, "setup() was called");
let settingChanged = waitForSettingChange(setting);
await settingChanged;
ok(true, "Setting emitted change from setup");
Preferences.onUnload();
ok(destroyCalled, "destroy() method was called");
});
// NOTE: Preferences have been unloaded, tests added here will likely fail
</script>
</head>
<body>
<p id="display"></p>
<div id="content" style="display: none"></div>
<pre id="test"></pre>
</body>
</html>