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Test Info:

// META: title=setTimeout and setInterval sequencing is correct even with 0 timeout
async_test(t => {
let done = false;
const id = setInterval(() => {
done = true;
}, 0);
t.add_cleanup(() => clearInterval(id));
setTimeout(t.step_func(() => {
assert_true(done);
t.done();
}), 0);
}, "setInterval(0) before setTimeout(0)");
async_test(t => {
let done = false;
setTimeout(() => {
done = true;
}, 0);
const id = setInterval(t.step_func(() => {
assert_true(done);
t.done();
}), 0);
t.add_cleanup(() => clearInterval(id));
}, "setTimeout(0) before setInterval(0)");