testdouble/testdouble.js

A minimal test double library for TDD with JavaScript

Stars: 1.4k
Forks: 140
Open beginner issues: 0
Indexed issues: 35
Avg merge: 22h
Merged PRs (30d): 1

Dominant language: JavaScript
License: MIT
Last GitHub push: Sep 18, 2026
Latest indexed: Sep 20, 2026
Contributing guide: No contributing guide
Code of conduct: Code of conduct
Beginner labels: No beginner labels indexed

Beginner friendly Everything

Open All

35 open issues indexed

after reset, don't bust cache for modules that weren't busted/replaced previously Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

testdouble/testdouble.js#538 · 1 comment · Opened Mar 12, 2026
Multiple stubbings with throwException causes unexpected behavior Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

testdouble/testdouble.js#537 · 1 comment · Opened Jan 25, 2026
possible to replace subset of exports from module? Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

testdouble/testdouble.js#536 · Opened Mar 15, 2025
testdouble experiencing memory issue when running 800 unit tests Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

testdouble/testdouble.js#534 · Opened Aug 29, 2024
`npm-run-all` to `npm-run-all2` Open

Difficulty 1/5 Under an hour Newbie friendliness 45/100

testdouble/testdouble.js#533 · Opened Aug 6, 2024
Stubbing a CJS module from an ESM Open

Difficulty 4/5 3-5 days Newbie friendliness 32/100

testdouble/testdouble.js#532 · 1 comment · Opened Jun 26, 2024
Module not found: Error: Can't resolve 'module' in 'node_modules/testdouble/lib' Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

testdouble/testdouble.js#531 · 2 comments · 2 reactions · Opened Jun 6, 2024
Suite test:esm fails under Node 21 Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

testdouble/testdouble.js#530 · 2 comments · Opened Apr 12, 2024
Feature request: `td.func().reset()` (reset spy/stub state) Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

testdouble/testdouble.js#529 · Opened Mar 20, 2024
`td.imitate` produces `undefined` for object keys of type `Accessor` Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

testdouble/testdouble.js#526 · Opened Feb 9, 2024
Feature request: reset specific module(s) Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

testdouble/testdouble.js#520 · 7 comments · 2 reactions · Opened Oct 17, 2023
Where is changelog for 3.19.0 Open

Difficulty 1/5 Under an hour Newbie friendliness 30/100

testdouble/testdouble.js#518 · 2 comments · Opened Sep 28, 2023
Add docs for using `testdouble` when we have to use another loader (ie `ts-node/esm`) Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

testdouble/testdouble.js#514 · 8 comments · Opened May 4, 2023
Consider relaxing `thenReject` to accept types other than `Error` Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

testdouble/testdouble.js#510 · 2 comments · Opened Mar 27, 2023
Trying to use testdouble in @web/test-runner fails with error about quibble Open

Difficulty 3/5 1-2 days Newbie friendliness 25/100

testdouble/testdouble.js#494 · 1 comment · Opened Jul 17, 2022
`replaceEsm` breaks usage of mongo db Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

testdouble/testdouble.js#488 · 2 comments · Opened Jun 5, 2022
td.replaceEsm() without namedExportStubs throws weird error under windows Open

Difficulty 3/5 1-2 days Newbie friendliness 40/100

testdouble/testdouble.js#475 · 11 comments · Opened Nov 19, 2021
Imitate should include Object.getOwnPropertySymbols Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

testdouble/testdouble.js#296 · Opened Nov 10, 2017
following the "game of life" example, td.verify with _.isEquality Open

Difficulty 3/5 1-2 days Newbie friendliness 25/100

testdouble/testdouble.js#295 · Opened Nov 10, 2017
Feature: Compatibility with 'app-root-path' Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

testdouble/testdouble.js#286 · Opened Sep 8, 2017
Add a warning when trying to replace and already replaced function Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

testdouble/testdouble.js#281 · 5 comments · 2 reactions · Opened Aug 15, 2017
Add generator function support Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

testdouble/testdouble.js#276 · Opened Jul 5, 2017
td.when breaks after td.replace on objects methods generators Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

testdouble/testdouble.js#275 · 3 comments · Opened Jul 4, 2017
td doesn't work with curry functions. Open

Difficulty 3/5 1-2 days Newbie friendliness 42/100

testdouble/testdouble.js#272 · 3 comments · Opened Jun 26, 2017
Improve stringification of captor.capture() matcher Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 45/100

testdouble/testdouble.js#269 · Opened Jun 24, 2017
The Big Epic Rewrite Issue Open

enhancement

testdouble/testdouble.js#263 · 1 comment · 1 assignee · Opened Jun 17, 2017
td.replace CJS module-replacement gives bad message if item is not requireable Open

bug

Difficulty 2/5 1-3 hours Newbie friendliness 40/100

testdouble/testdouble.js#261 · Opened Jun 14, 2017
a "Coming from Sinon" doc Open

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

testdouble/testdouble.js#219 · 2 reactions · Opened Mar 25, 2017
Deprecate `td.function` in favor of `td.func` Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

testdouble/testdouble.js#214 · Opened Mar 19, 2017
Investigate early warnings for callback API mock misses Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

testdouble/testdouble.js#210 · 1 comment · Opened Mar 17, 2017
add `withContext` option Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

testdouble/testdouble.js#207 · 3 reactions · Opened Mar 15, 2017
td.reset(thingsBlewUpSoPleaseLogWarnings=true) Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

testdouble/testdouble.js#162 · 7 comments · 1 reaction · Opened Dec 12, 2016
Improve flow of getting started doc Open

Difficulty 2/5 1-3 hours Newbie friendliness 58/100

testdouble/testdouble.js#63 · 1 comment · Opened Dec 16, 2015
td.explain should work on objects that contain test doubles Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

testdouble/testdouble.js#48 · 2 comments · 1 reaction · Opened Nov 14, 2015
Warn when arity of stubbing or verification doesn't match function.length Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

testdouble/testdouble.js#3 · 5 comments · Opened Sep 7, 2015

A short digest of beginner-friendly GitHub issues.