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Official ECMAScript Conformance Test Suite

11 mentions on Hacker News by 11 people: 0 stories, 11 comments · first 2017-11-15 · latest 2026-06-20

Mentions per year 11 mentions · busiest year 2024 (3)
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  1. …are in that language and agnostic to the implementation language. For a JS engine that's Test 262: https://github.com/tc39/test262 For node that's its unit tests which are mostly JS: https://github.com/nodejs/node/tree/main/test Node also…
    comment by esprehn · 2026-06-20 · in Bun has an open PR adding shared-memory threads to JavaScriptCore
  2. …at building test suites. for example every js exploit found in browsers should also be added to https://github.com/tc39/test262 .
    comment by nektro · 2026-04-16 · in Cybersecurity looks like proof of work now
  3. The primary JS test suite is maintained by the authors of the specification itself: https://github.com/tc39/test262
    comment by trflynn89 · 2026-02-23 · in Ladybird adopts Rust, with help from AI
  4. …[4] https://test262.fyi/#|v8,v8_exp,jsc,jsc_exp,sm,sm_exp [5] https://github.com/tc39/test262/issues/3002
    comment by AlexErrant · 2024-08-24 · in JavaScript dates are about to be fixed
  5. …Context: I'm Syrus, from Wasmer [3] [1] https://github.com/facebook/hermes/discussions/1137 [2] https://github.com/tc39/test262 [3] https://wasmer.io
    comment by syrusakbary · 2024-07-30 · in Porffor: A from-scratch experimental ahead-of-time JS engine
  6. Indeed. These may be even more important... https://github.com/tc39/test262
    comment by LeFantome · 2024-02-07 · in The Ladybird browser project
  7. …missing edge cases in the APIs or really weird quirks in the interop with the host environment. https://github.com/tc39/test262 is the ecma test suite. rhino for example has extensive gaps: https://github.com/mozilla/rhino/blob/master/tests…
    comment by ysleepy · 2021-09-22 · in Enumerating and analyzing 40 non-V8 JavaScript implementations
  8. …test262 [0], which is a full test suite for JavaScript conformance across engines and vendors. [0] https://github.com/tc39/test262
    comment by TheAceOfHearts · 2021-04-04 · in I bought ISO 8601-1:2019 and 8601-2:2019
  9. …section[2] that seems like a bad change or even having to do with regex grammar at all. [1] https://github.com/tc39/test262/tree/master/test/built-ins/R... [2] https://www.ecma-international.org/ecma-262/#sec-additions-a...
    comment by magicalist · 2020-06-12 · in A New RegExp Engine in SpiderMonkey
  10. It uses the tc39 testsuite for verification: https://github.com/tc39/test262
    comment by the_mitsuhiko · 2018-12-23 · in Speedy Web Compiler – A Rust port of Babel and Closure Compiler
  11. …that's a fascinating part of the story. We run the entire test262 ECMAScript Conformance Suite ( https://github.com/tc39/test262 ) against our JS-Interpreter fork. We don't pass the whole thing yet, but it ensures we only ratchet toward…
    comment by islemaster · 2017-11-15 · in “It is never a compiler error”