Idle timer shadows busy timers at rare cases

[d4vidi]

Description

In ReactNativeTimersIdlingResource, "idle" timer can shadow the existence of a "busy" timer waiting in queue, causing isIdle() to falsely return true.

To be specific, this iteration tries to find the next timer, rather than the next busy timer. Thus, in the case where the next timer to pop happens to be a long one (duration > 1500ms), isIdle() would always return true -- even there's another timer waiting with a short duration whose target time happens to be past the 1st one's.

Steps to Reproduce

Pretty rare.

Detox, Node, Device, Xcode and macOS Versions

N/A

[d4vidi]

Fixed in PR #1085