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<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="resources/test-helpers.sub.js"></script>
<body>
<script>
promise_test(function (t) {
var currentState = 'test-is-starting';
var scope = 'resources/state/';
return service_worker_unregister_and_register(
t, 'resources/empty-worker.js', scope)
.then(function(registration) {
t.add_cleanup(function() {
return service_worker_unregister(t, scope);
});
var sw = registration.installing;
assert_equals(sw.state, 'installing',
'the service worker should be in "installing" state.');
checkStateTransition(sw.state);
return onStateChange(sw);
});
function checkStateTransition(newState) {
switch (currentState) {
case 'test-is-starting':
break; // anything goes
case 'installing':
assert_in_array(newState, ['installed', 'redundant']);
break;
case 'installed':
assert_in_array(newState, ['activating', 'redundant']);
break;
case 'activating':
assert_in_array(newState, ['activated', 'redundant']);
break;
case 'activated':
assert_equals(newState, 'redundant');
break;
case 'redundant':
assert_unreached('a ServiceWorker should not transition out of ' +
'the "redundant" state');
break;
default:
assert_unreached('should not transition into unknown state "' +
newState + '"');
break;
}
currentState = newState;
}
function onStateChange(expectedTarget) {
return new Promise(function(resolve) {
expectedTarget.addEventListener('statechange', resolve);
}).then(function(event) {
assert_true(event.target instanceof ServiceWorker,
'the target of the statechange event should be a ' +
'ServiceWorker.');
assert_equals(event.target, expectedTarget,
'the target of the statechange event should be ' +
'the installing ServiceWorker');
assert_equals(event.type, 'statechange',
'the type of the event should be "statechange".');
checkStateTransition(event.target.state);
if (event.target.state != 'activated')
return onStateChange(expectedTarget);
});
}
}, 'Service Worker state property and "statechange" event');
</script>
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