test: syncertest/fake enhancements #2023
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Summary of ChangesHello @Camila-B, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed! This pull request significantly refines the Highlights
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Code Review
The pull request introduces significant improvements to the fake cache and watch mechanisms, primarily focusing on enhancing robustness and supporting initial event synchronization. Key changes include correcting a mutex unlock in fake.Cache.Start, refactoring WaitForCacheSync for better modularity, and implementing SendInitialEvents in MemoryStorage.Watch. Additionally, Watcher.handleEvents now gracefully handles empty ResourceVersion strings, and Watcher.sendEvent bypasses list filter validation for Bookmark events. These changes collectively contribute to a more reliable and feature-complete fake client for testing purposes.
| if err != nil { | ||
| return |
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In a goroutine, return statements silently discard errors. It's generally better to log errors that occur within goroutines, especially when they indicate a potential issue like failing to create a bookmark object. This ensures that such failures are visible and can be debugged.
Consider logging the error before returning.
bookmarkObj, err := kinds.NewObjectForGVK(gvk, ms.scheme)
if err != nil {
klog.Errorf("Failed to create bookmark object for initial watch events: %v", err)
return
}| if err != nil { | ||
| return |
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Similar to the previous comment, silently returning from a goroutine on error can hide important issues. Logging the error here would provide better visibility into potential problems during object conversion.
Consider logging the error before returning.
cObj, err := kinds.ObjectAsClientObject(bookmarkObj)
if err != nil {
klog.Errorf("Failed to convert bookmark object to client object for initial watch events: %v", err)
return
}| rvStr := obj.GetResourceVersion() | ||
| if rvStr != "" { |
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Adding a check for an empty ResourceVersion string before attempting to parse it is a good defensive programming practice. This prevents strconv.Atoi from returning an error for valid empty strings, improving the robustness of the watcher.
| rvStr := obj.GetResourceVersion() | |
| if rvStr != "" { | |
| rvStr := obj.GetResourceVersion() | |
| if rvStr != "" { |
| return | ||
| // Check if input object matches list option filters. | ||
| // Skip for Bookmark events, as they may not match filters. | ||
| if event.Type != watch.Bookmark { |
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Skipping list filter validation for watch.Bookmark events is a necessary adjustment. Bookmark events often carry metadata rather than full object specifications, and forcing them through object filters could lead to incorrect filtering or errors. This change ensures that Bookmark events are handled appropriately without unintended side effects.
| if event.Type != watch.Bookmark { | |
| if event.Type != watch.Bookmark { |
- Fixed `fake.Cache`: Corrected the Start method's locking logic and updated WaitForCacheSync to properly wait for all informers to synchronize using k8scache.WaitForCacheSync. - Implemented `WatchList` Support: Modified MemoryStorage.Watch to support SendInitialEvents by asynchronously sending synthetic ADDED events for existing objects, followed by a Bookmark event with the k8s.io/initial-events-end: true annotation. - Improved Watcher Robustness: Updated Watcher.handleEvents to gracefully handle empty ResourceVersion strings and modified Watcher.sendEvent to allow Bookmark events to bypass list filter validation.
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fake.Cache: Corrected the Start method's locking logic and updated WaitForCacheSync to properly wait for all informers to synchronize using k8scache.WaitForCacheSync.WatchListSupport: Modified MemoryStorage.Watch to support SendInitialEvents by asynchronously sending synthetic ADDED events for existing objects, followed by a Bookmark event with the k8s.io/initial-events-end: true annotation.