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// META: title=StorageManager: estimate() for caches
promise_test(async t => {
let estimate = await navigator.storage.estimate();
const cachesUsageBeforeCreate = estimate.usageDetails.caches || 0;
const cacheName = 'testCache';
const cache = await caches.open(cacheName);
t.add_cleanup(() => caches.delete(cacheName));
await cache.put('/test.json', new Response('x'.repeat(1024*1024)));
estimate = await navigator.storage.estimate();
assert_true('caches' in estimate.usageDetails);
const cachesUsageAfterPut = estimate.usageDetails.caches;
assert_greater_than(
cachesUsageAfterPut, cachesUsageBeforeCreate,
'estimated usage should increase after value is stored');
}, 'estimate() shows usage increase after large value is stored');
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