fix: set bootstrap app to global #180
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WalkthroughThe changes introduce a global variable Changes
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Actionable comments posted: 1
🧹 Nitpick comments (3)
src/lib/app_handler.ts (3)
11-13: **Consider alternative approaches rather than usingglobalThisdirectly **Although this approach centralizes the app instance, it relies on mutable global state and can introduce complexities for testing, concurrency, or dynamic reconfiguration. Depending on your application’s needs, consider using a dedicated state management module or dependency injection container rather than storing it in the global scope.
18-18: **Avoid non-null assertion operator if possible **You are using the
!operator to assert non-nullness, but at this point,__eggMockAppInstancecan benull. Consider a more explicit null check or throw an error to avoid potential runtime type errors if it hasn’t been set yet.- let app = globalThis.__eggMockAppInstance!; + let app = globalThis.__eggMockAppInstance; + if (!app) { + debug('No existing __eggMockAppInstance found, creating a new app...'); + }
76-76: **Return typed or gracefully handled instance **
getBootstrapApp()returns the global instance with a non-null assertion, but in some scenarios—like a test that doesn’t initialize the app—this might still benull. Consider returning an explicit union type or throwing a descriptive error if the instance is uninitialized.-export function getBootstrapApp() { - return globalThis.__eggMockAppInstance!; +export function getBootstrapApp(): ApplicationUnittest | null { + return globalThis.__eggMockAppInstance; +}
📜 Review details
Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro
📒 Files selected for processing (1)
src/lib/app_handler.ts(3 hunks)
🔇 Additional comments (2)
src/lib/app_handler.ts (2)
15-15: **Ensure that null initialization is always properly overwritten **
Explicitly setting globalThis.__eggMockAppInstance to null ensures clean startup but be cautious when the code runs in contexts that might re-import this file. You may want to verify that this reference is overwritten only once per process lifecycle or test run.
✅ Verification successful
**__eggMockAppInstance initialization and usage pattern is safe **
The code shows a well-controlled lifecycle for __eggMockAppInstance:
- It's initially declared as a nullable type and set to
null - It's only set to a non-null value once in
setupApp()after app initialization - All other occurrences are just reads of the instance
- The initialization appears in a single file (
src/lib/app_handler.ts)
This pattern ensures the reference is properly managed without risk of inadvertent resets during the process lifecycle.
🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash
# Description: Search for references to `__eggMockAppInstance` to verify it’s not reset inadvertently in multiple places.
rg -A 3 '__eggMockAppInstance'
Length of output: 926
54-54: **Safely handle global instance assignment **
Before assigning app to __eggMockAppInstance, verify that no other asynchronous tasks are also setting or re-initializing the global instance. If the app creation is parallelized (especially with ENABLE_MOCHA_PARALLEL), ensure it won’t result in multiple references to different app instances.
✅ Verification successful
Let me gather more information about the app instance handling.
**Global instance assignment is safely handled in parallel mode **
The codebase has proper safeguards for handling the global app instance in parallel mode:
- When
ENABLE_MOCHA_PARALLELis enabled, the app creation is handled bycreateParallelAppwhich has its own initialization flow - The global cleanup is skipped in parallel mode (
if (process.env.ENABLE_MOCHA_PARALLEL) return;in register.ts) - The app instance is properly cached using
apps.set(options.baseDir, proxyApp)to prevent multiple instances - The parallel mode implementation ensures proper synchronization with the agent through
beforeInithook
🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash
# Description: Check for any concurrent creation code.
rg -A 3 'createApp|createParallelApp'
Length of output: 1994
Script:
#!/bin/bash
# Check the app instance handling logic
ast-grep --pattern 'globalThis.__eggMockAppInstance = $_'
# Check if there's any parallel test configuration
rg -A 3 'ENABLE_MOCHA_PARALLEL|parallel'
# Check the app caching mechanism
ast-grep --pattern 'apps.set($_, $_)'
Length of output: 6598
Codecov ReportAttention: Patch coverage is
Additional details and impacted files@@ Coverage Diff @@
## master #180 +/- ##
==========================================
- Coverage 57.34% 57.34% -0.01%
==========================================
Files 21 21
Lines 2431 2438 +7
Branches 191 191
==========================================
+ Hits 1394 1398 +4
- Misses 1037 1040 +3 ☔ View full report in Codecov by Sentry. |
[skip ci] ## [6.0.2](v6.0.1...v6.0.2) (2024-12-29) ### Bug Fixes * set bootstrap app to global ([#180](#180)) ([4e1525c](4e1525c))
Summary by CodeRabbit