fix: include skipQueue tasks in queueSize getter (backport to v5)

[algojogacor]

This is an independent contribution and is not associated with any hackathon or competition.

Summary

Backport the queueSize fix from the current branch to v5. The queueSize getter now accounts for tasks in skipQueue that were submitted with an AbortSignal.

Root Cause

When tasks are submitted with an AbortSignal and cannot be scheduled immediately, they are placed in the skipQueue (line 468 of src/index.ts) instead of the taskQueue. However, the queueSize getter only counted taskQueue.size, ignoring tasks waiting in skipQueue. This caused pool.queueSize to report 0 even when tasks were queued.

Fix

Added + pool.skipQueue.length to the queueSize getter calculation:

- return Math.max(pool.taskQueue.size - pool.pendingCapacity(), 0);
+ return Math.max((pool.taskQueue.size + pool.skipQueue.length) - pool.pendingCapacity(), 0);

This is a backport of the fix already present on the current branch.

Testing

• The existing skipQueue integration already drains during _maybeDrain() — the getter now reflects its contents.
• No behavioral regression: the returned value only increases (or stays the same) since we added, never subtracted.

Closes #1029

[metcoder95]

can you add a test for it?

[github-actions]

This issue has been marked as stale because it has been opened 45 days without activity. Remove stale label or comment or this will be closed in 10 days.