test262-summary.md

Test262 Suite Structure

Discovered from: Asynkron.JsEngine.Tests.Test262

Overview

• Total Test Methods: 1,631
• Total Test Cases: 92,945
• Average Test Cases per Method: ~57

Largest Test Methods (by test case count)

Rank	Method Name	Test Cases
1	Expressions_class_dstr	3,840
2	Statements_class_dstr	3,840
3	Statements_forAwaitOf	2,431
4	Object_defineProperty	2,250
5	Statements_class_elements	2,088
6	Expressions_class_elements	1,881
7	Object_defineProperties	1,264
8	Expressions_object_dstr	1,122
9	Statements_forOf_dstr	1,095
10	RegExp	976

Structure

All tests are grouped under:

• Namespace: Tests
• Class: GeneratedTests
• Methods: 1,631 test methods with varying numbers of test cases

Files

• test262-structure.json (881 KB) - Full test structure with all metadata
• test262-top-methods.json - Top 20 methods by test case count

Batching Strategy

For efficient execution with hang detection:

1. Method-level batching: Group by test method (1,631 batches)

   • Smallest batch: ~1-2 test cases
   • Largest batch: 3,840 test cases
   • Most batches: ~50-60 test cases

2. Adaptive splitting: When a batch hangs:

   • Parse TRX to find passed tests
   • Parse blame-hang to find hanging test
   • Remove hanging test
   • Split remaining into smaller batches
   • Recurse until all non-hanging tests pass

3. Tree display: Show progress as:

   Tests > GeneratedTests > MethodName (X/Y test cases passed)