Improve tests

[satyakigh]

Key Changes

Test Fixture Consolidation

• Moved repeated mock schema creation from individual test cases to shared fixtures at the describe/module level
• Introduced reusable schema constants (defaultSchemas, s3Schemas, emptySchemas, fourSchemas, etc.) to eliminate redundant combinedSchemas() calls
• Extracted custom schema definitions (customTypeSchema, customTypeWithNestedIdSchema, etc.) to module-level constants

Mock Setup Simplification

• Removed repetitive createMockResourceSchemas() and setupMockSchemas() helper functions in favor of pre-configured test fixtures
• Consolidated beforeEach setup by initializing common mocks once at the describe level
• Simplified createMockComponents() usage by passing pre-configured schema retrievers

Test Cleanup

• Removed flaky timing-based tests in PyodideWorkerManager.test.ts that tested exponential backoff delays, jitter, and timeout behavior
• Replaced with a single focused test that verifies correct config is passed to retryWithExponentialBackoff
• Deleted wheel-download.test.ts which had external dependencies on Python/pip

Modified Test Files - Comparison

Test File	Tests Before	Tests After	Time Before	Time After	Δ Time	Δ %
ResourceEntityCompletionProvider.test.ts	13	13	616ms	23ms	-593ms	-96.3%
ResourcePropertyCompletionProvider.test.ts	62	62	4,353ms	1,487ms	-2,866ms	-65.8%
ResourceStateCompletionProvider.test.ts	17	17	4,169ms	23ms	-4,146ms	-99.4%
StackHandler.test.ts	42	42	1,966ms	178ms	-1,788ms	-90.9%
RelatedResourcesSnippetProvider.test.ts	10	10	2,955ms	41ms	-2,914ms	-98.6%
ResourceStateImporter.test.ts	36	36	14,972ms	65ms	-14,907ms	-99.6%
PyodideWorkerManager.test.ts	29	25	3,003ms	1,976ms	-1,027ms	-34.2%

Deleted Test Files

Test File	Tests	Time	Reason
wheel-download.test.ts	2	16,647ms	External Python/pip dependencies
standalone.test.ts	1	4ms	Removed

Summary

Category	Time Saved
Modified files	-28,241ms
Deleted files	-16,651ms
Total	-44,892ms (~45s)

Overall Test Suite Summary

Metric	Before	After	Change
Test Files	210	208	-2
Test Execution	123.25s	81.34s	-41.91s (-34%)

Flaky test - https://github.com/aws-cloudformation/cloudformation-languageserver/actions/runs/20047430606/job/57495971389?pr=294

[satyakigh]

Already being tested in https://github.com/aws-cloudformation/cloudformation-languageserver/blob/main/tst/unit/utils/Retry.test.ts

[Zee2413]

why is s3Bucket schema repeated

[Zee2413]

I see what combineSchema is doing. It should be renamed to indicate it copies/renames/patches

[Zee2413]

this reset is no longer needed