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Test Info:

/**
* Any copyright is dedicated to the Public Domain.
*/
const { PrincipalUtils } = ChromeUtils.importESModule(
);
const { TestUtils } = ChromeUtils.importESModule(
);
add_task(async function testSteps() {
const principal = PrincipalUtils.createPrincipal("https://example.com");
const name = "test_databaseWorkStarted.js";
info("Starting database opening");
const openPromise = new Promise(function (resolve, reject) {
const sandbox = new Cu.Sandbox(principal, {
wantGlobalProperties: ["caches"],
});
sandbox.resolve = resolve;
sandbox.reject = reject;
Cu.evalInSandbox(`caches.open("${name}").then(resolve, reject);`, sandbox);
});
info("Waiting for database work to start");
await TestUtils.topicObserved("CacheAPI::DatabaseWorkStarted");
info("Waiting for database to finish opening");
await openPromise;
});