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// Return a promise that will resolve to `undefined` the next time jobs are
// processed.
//
// `ticks` indicates how long the promise should "wait" before resolving: a
// promise created with `asyncSleep(n)` will become settled and fire its handlers
// before a promise created with `asyncSleep(n+1)`.
//
function asyncSleep(ticks) {
let p = Promise.resolve();
if (ticks > 0) {
return p.then(() => asyncSleep(ticks - 1));
}
return p;
}
// Run the async function `test`. Wait for it to finish running. Throw if it
// throws or if it fails to finish (awaiting a value forever).
function runAsyncTest(test) {
let passed = false;
let problem = "test did not finish";
test()
.then(_ => { passed = true; })
.catch(exc => { problem = exc; });
drainJobQueue();
if (!passed) {
throw problem;
}
reportCompare(0, 0);
}