fix(native-watcher): fix aggregate handler trigger

[h-a-n-a]

Summary

Pass more native watcher tests.

1. Introduce last_changed to indicate when the last change was made. This field is monitored by the event aggregation handler. Once timeout, the handler will be triggered, otherwise the thread will be put to sleep for the remaining duration. (This fixed the case of should watch multiple files where aggregation handler is not triggered according to the last modification)
2. Cases ported: should_not_watch_a_single_ignored_file_glob, should_not_watch_a_single_ignored_file_regexp, should_watch_multiple_files

Related links

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

[netlify]

✅ Deploy Preview for rspack canceled.

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🔨 Latest commit	1c5cdd5
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[github-actions]

📦 Binary Size-limit

Comparing 1c5cdd5 to ci(native-watcher): test multiple platforms (#12197) by Hana

❌ Size increased by 1.63KB from 47.45MB to 47.46MB (⬆️0.00%)

[codspeed-hq]

CodSpeed Performance Report

Merging #12203 will not alter performance

_{Comparing port-watchpack-tests (1c5cdd5) with main (a85877a)}

Summary

✅ 17 untouched

[Copilot]

Pull Request Overview

This PR fixes the aggregate handler trigger mechanism in the native watcher by introducing a last_changed field to track when the last file change occurred. The aggregate handler now monitors this timestamp and triggers only after the specified timeout has elapsed since the last change, rather than triggering immediately.

Key Changes

• Introduced last_changed: Arc<RwLock<Option<Instant>>> to track the timestamp of the last file system event
• Refactored aggregate task to use a polling loop that checks elapsed time since last change
• Restructured test helpers with new macros and improved error handling
• Added comprehensive tests for single and multiple file watching scenarios

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 8 comments.

File	Description
crates/rspack_watcher/src/executor.rs	Core logic changes: added last_changed field and refactored aggregate timeout handling from event-based to time-based polling
crates/rspack_watcher/tests/watcher.rs	New test cases for single file, ignored files (glob/regex), and multiple file watching scenarios
crates/rspack_watcher/tests/helpers/mod.rs	Added collect_events (non-blocking), tick_ms, improved error handling, and changed time precision to microseconds
crates/rspack_watcher/tests/helpers/macros.rs	Extracted test macros into separate module for better organization

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