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<!DOCTYPE html>
<title>Service Worker: registration events</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="resources/test-helpers.sub.js"></script>
<script>
promise_test(function(t) {
var script = 'resources/empty-worker.js';
var scope = 'resources/blank.html';
var registration;
return service_worker_unregister_and_register(t, script, scope)
.then(function(registration) {
var sw = registration.installing;
return new Promise(t.step_func(function(resolve) {
sw.onstatechange = t.step_func(function() {
if (sw.state === 'installed') {
assert_equals(registration.active, null,
'installed event should be fired before activating service worker');
resolve();
}
});
}));
})
.then(function() {
return service_worker_unregister_and_done(t, scope);
})
.catch(unreached_rejection(t));
}, 'installed event should be fired before activating service worker');
</script>
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