npmpackage.info

fast-check

Property based testing framework for JavaScript (like QuickCheck) written in TypeScript

3.23.1

4,357

MIT

TypeScript

48.65 kB

69,368,415 8.9

Installations

npm install fast-check

Score

99.7

Supply Chain

100

Quality

89.4

Maintenance

100

Vulnerability

100

License

Pull Requests

Open

9

Total

4,834

Closed

266

Merged

4,559

Issues

Open

52

Total

550

Closed

498

Releases

238

Faster instantiation of internet-related arbitraries

v3.23.1

Published on 03 Nov 2024

Rework our testing stack

worker/v0.4.1

Published on 01 Nov 2024

Rework our testing stack

vitest/v0.1.4

Published on 01 Nov 2024

Rework our testing stack

poisoning/v0.2.2

Published on 01 Nov 2024

Rework our testing stack

packaged/v0.4.1

Published on 01 Nov 2024

Rework our testing stack

jest/v2.0.3

Published on 01 Nov 2024

View all 238 releases

Developer

dubzzz

Developer Guide

BETA

Module System

CommonJS, ESM

Min. Node Version

>=8.0.0

Typescript Support

Yes

Node Version

20.18.0

NPM Version

10.8.2 Statistics

4,357 Stars

5,352 Commits

182 Forks

19 Watching

23 Branches

70 Contributors

Updated on 29 Nov 2024

Bundle Size

162.47 kB

Minified

48.65 kB

Minified + Gzipped

Bundlephobia

Languages

TypeScript (95.47%)

JavaScript (2.95%)

MDX (1.03%)

CSS (0.43%)

Shell (0.13%)

Total Downloads

Cumulative downloads

Total Downloads

69,368,415

Last day

-62.4%

200,323

Compared to previous day

Last week

-14.6%

2,048,371

Compared to previous week

Last month

12.6%

8,602,815

Compared to previous month

Last year

278.4%

44,571,476

Compared to previous year

Daily Downloads

Weekly Downloads

Monthly Downloads

Yearly Downloads

Dependencies

pure-rand

Dev Dependencies

@fast-check/expect-type @fast-check/poisoning @microsoft/api-extractor @types/node @vitest/coverage-v8 cross-env glob not-node-buffer regexp-tree replace-in-file typedoc typescript vitest

Versions

Property based testing framework for JavaScript/TypeScript

Getting started

Hands-on tutorial and definition of Property Based Testing: 🏁 see tutorial. Or directly try it online on our pre-configured CodeSandbox.

Property based testing frameworks check the truthfulness of properties. A property is a statement like: for all (x, y, ...) such that precondition(x, y, ...) holds predicate(x, y, ...) is true.

Install the module with: yarn add fast-check --dev or npm install fast-check --save-dev

Example of integration in mocha:

1import fc from 'fast-check';
2
3// Code under test
4const contains = (text, pattern) => text.indexOf(pattern) >= 0;
5
6// Properties
7describe('properties', () => {
8  // string text always contains itself
9  it('should always contain itself', () => {
10    fc.assert(fc.property(fc.string(), (text) => contains(text, text)));
11  });
12  // string a + b + c always contains b, whatever the values of a, b and c
13  it('should always contain its substrings', () => {
14    fc.assert(
15      fc.property(fc.string(), fc.string(), fc.string(), (a, b, c) => {
16        // Alternatively: no return statement and direct usage of expect or assert
17        return contains(a + b + c, b);
18      }),
19    );
20  });
21});

In case of failure, the test raises a red flag. Its output should help you to diagnose what went wrong in your implementation. Example with a failing implementation of contain:

1) should always contain its substrings
    Error: Property failed after 1 tests (seed: 1527422598337, path: 0:0): ["","",""]
    Shrunk 1 time(s)
    Got error: Property failed by returning false

    Hint: Enable verbose mode in order to have the list of all failing values encountered during the run

Integration with other test frameworks: ava, jasmine, jest, mocha and tape.

More examples: simple examples, fuzzing and against various algorithms.

Useful documentations:

Why should I migrate to fast-check?

fast-check has initially been designed in an attempt to cope with limitations I encountered while using other property based testing frameworks designed for JavaScript:

Types: strong and up-to-date types - thanks to TypeScript
Extendable: easy map method to derive existing arbitraries while keeping shrink [more] - some frameworks ask the user to provide both a->b and b->a mappings in order to keep a shrinker
Extendable: kind of flatMap-operation called chain [more] - able to bind the output of an arbitrary as input of another one while keeping the shrink working
Extendable: precondition checks with fc.pre(...) [more] - filtering invalid entries can be done directly inside the check function if needed
Extendable: easily switch from fake data in tests to property based with fc.gen() [more] - generate random values within your predicates
Smart: ability to shrink on fc.oneof [more] - surprisingly some frameworks don't
Smart: biased by default - by default it generates both small and large values, making it easier to dig into counterexamples without having to tweak a size parameter manually
Debug: verbose mode [more][tutorial] - easier troubleshooting with verbose mode enabled
Debug: replay directly on the minimal counterexample [tutorial] - no need to replay the whole sequence, you get directly the counterexample
Debug: custom examples in addition of generated ones [more] - no need to duplicate the code to play the property on custom examples
Debug: logger per predicate run [more] - simplify your troubleshoot with fc.context and its logging feature
Unique: model based approach [more][article] - use the power of property based testing to test UI, APIs or state machines
Unique: detect race conditions in your code [more][tutorial] - shuffle the way your promises and async calls resolve using the power of property based testing to detect races
Unique: simplify user definable corner cases [more] - simplify bug resolution by asking fast-check if it can find an even simpler corner case

For more details, refer to the documentation in the links above.

Trusted

fast-check has been trusted for years by big projects like: jest, jasmine, fp-ts, io-ts, ramda, js-yaml, query-string...

Powerful

It also proved useful in finding bugs among major open source projects such as jest, query-string... and many others.

Compatibility

Here are the minimal requirements to use fast-check properly without any polyfills:

fast-check	node	ECMAScript version	TypeScript (optional)
3.x	≥8⁽¹⁾	ES2017	≥4.1⁽²⁾
2.x	≥8⁽¹⁾	ES2017	≥3.2⁽³⁾
1.x	≥0.12⁽¹⁾	ES3	≥3.0⁽³⁾

More details...

Except for features that cannot be polyfilled - such as bigint-related ones - all the capabilities of fast-check should be usable given you use at least the minimal recommended version of node associated to your major of fast-check.
Require either lib or target ≥ ES2020 or @types/node to be installed.
Require either lib or target ≥ ES2015 or @types/node to be installed.

ReScript bindings

Bindings to use fast-check in ReScript are available in package rescript-fast-check. They are maintained by @TheSpyder as an external project.

Contributors ✨

Thanks goes to these wonderful people (emoji key):

_{Nicolas DUBIEN} 💻 📖 ⚠️ 🚇 🎨 🚧	_{Aaron Elligsen} 💻 📖 ⚠️	_{Will Heslam} 📖	_kazchimo 💻 📖	_{Brandon Chinn} 💻 📖	_{Irakli Safareli} 📖	_{Andrew Herron} 📖 🔌
_{Eric Crosson} 📖 💻	_burrscurr 📖	_{JC (Jonathan Chen)} 📖	_{Larry Botha} 📖 💻 ⚠️	_{Roman Gusev} 📖	_{Tim Wisniewski} 📖	_{Brais Piñeiro} 💻 ⚠️
_{Renaud-Pierre Bordes} 🎨	_{Jemma Nelson} 📖	_{John Haugeland} 📖	_{Trey Davis} 🎨	_{Leon Si} 📖	_{Gorgi Kosev} 🚇	_mayconsacht 💻
_{Simon Friis Vindum} 💻 ⚠️	_{Richard Gibson} 📖	_{Alan Harper} 📖	_{Makien Osman} 💻	_{David Sommerich} 💻 ⚠️	_{Diego Pedro} 💻 ⚠️	_{Borui Gu} 📖
_{Brian Donovan} 📖	_volrk 💻 📖 ⚠️	_tinydylan 💻 ⚠️	_{Caleb Jasik} 📖	_{Rulai Hu} 📖	_{Afonso Jorge Ramos} 📖	_{Tom Jenkinson} 📖
_phormio 📖	_{Giovanni Gonzaga} 💻 ⚠️	_{Tomas Carnecky} 💻	_{Kirill Romanov} 💻 📖 ⚠️	_{Giovanny González} 📖	_{Mark Kulube} 🚇	_{Peter Hamilton} 💻
_{Chinedu Ozodi} 📖	_{Gunar Gessner} 📖	_{Christian Batchelor} ⚠️	_{Tomer Aberbach} 💻 📖 ⚠️	_0xflotus 📖	_{Ryan Leonard} 💻 📖 ⚠️	_{Jason Dreyzehner} 💻 ⚠️
_{Matin Zadeh Dolatabad} 💻	_{Juan Julián Merelo Guervós} 📖	_{Simen Bekkhus} 📖	_{Tarjei Skjærset} 📖	_{Denis Gorbachev} 📖	_{Trevor McCauley} 📖	_{Grant Kiely} 📖
_{Attila Večerek} 💻 📖 ⚠️	_{Zach Bjornson} 💻 📖	_{Bennett Perkins} 📖	_{Alexandre Oger} 📖	_{ej shafran} 📖	_{Niklas Gruhn} 💻	_{Patrick Roza} 💻
_{Cindy Wu} 📖	_Noah 📖	_{James Vaughan} 📖

This project follows the all-contributors specification. Contributions of any kind welcome! Become one of them

Sponsors 💸

Many individuals and companies offer their financial support to the project, a huge thanks to all of them too 💓

You can also become one of them by contributing via GitHub Sponsors or OpenCollective.

No vulnerabilities found.

10

Binary-Artifacts

Determines if the project has generated executable (binary) artifacts in the source repository.

10

CI-Tests

Determines if the project runs tests before pull requests are merged.

10

Dangerous-Workflow

Determines if the project's GitHub Action workflows avoid dangerous patterns.

10

Dependency-Update-Tool

Determines if the project uses a dependency update tool.

10

Fuzzing

Determines if the project uses fuzzing.

Reason

project is fuzzed

Details

Info: TypeScriptPropertyBasedTesting integration found: examples/001-simple/decompPrime/main.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: examples/001-simple/fibonacci/main.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: examples/001-simple/indexOf/main.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: examples/001-simple/sort/main.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: examples/002-recursive/isSearchTree/arbitraries/BinarySearchTreeArbitrary.ts:2
Info: TypeScriptPropertyBasedTesting integration found: examples/002-recursive/isSearchTree/arbitraries/BinaryTreeArbitrary.ts:2
Info: TypeScriptPropertyBasedTesting integration found: examples/002-recursive/isSearchTree/main.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: examples/003-misc/knight/arbitraries/SpaceArbitrary.ts:2
Info: TypeScriptPropertyBasedTesting integration found: examples/003-misc/knight/main.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: examples/003-misc/mazeGenerator/main.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: examples/003-misc/mazeGenerator/src/mazeGenerator.ts:2
Info: TypeScriptPropertyBasedTesting integration found: examples/003-misc/roman/main.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: examples/004-stateMachine/musicPlayer/main.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: examples/004-stateMachine/musicPlayer/model-based/MusicPlayerCommands.ts:2
Info: TypeScriptPropertyBasedTesting integration found: examples/004-stateMachine/musicPlayer/model-based/MusicPlayerModel.ts:2
Info: TypeScriptPropertyBasedTesting integration found: examples/005-race/counter/main.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: examples/005-race/dependencyTree/main.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: examples/005-race/supertest/app.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: examples/005-race/todolist/model-based/Model.ts:2
Info: TypeScriptPropertyBasedTesting integration found: examples/vitest.setup.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/ava/src/ava-fast-check.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/ava/test-types/main.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test-types/main.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/e2e/Bundle.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/e2e/seed.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/__test-helpers__/ArbitraryAssertions.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/__test-helpers__/FloatingPointHelpers.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/__test-helpers__/ShrinkTree.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/__test-helpers__/SizeHelpers.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/__test-helpers__/SpyCleaner.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/AdapterArbitrary.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/ArrayArbitrary.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/ArrayInt64Arbitrary.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/BigIntArbitrary.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/CloneArbitrary.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/ConstantArbitrary.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/FrequencyArbitrary.part1.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/FrequencyArbitrary.part2.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/IntegerArbitrary.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/LimitedShrinkArbitrary.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/MixedCaseArbitrary.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/StreamArbitrary.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/SubarrayArbitrary.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/WithShrinkFromOtherArbitrary.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/builders/AnyArbitraryBuilder.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/builders/TypedIntArrayArbitraryBuilder.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/helpers/ArrayInt64.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/helpers/BiasNumericRange.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/helpers/CustomEqualSet.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/helpers/DoubleHelpers.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/helpers/DoubleOnlyHelpers.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/helpers/FloatHelpers.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/helpers/GraphemeRangesHelpers.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/helpers/InvalidSubdomainLabelFiIter.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/helpers/MaxLengthFromMinLength.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/helpers/SameValueSet.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/helpers/SameValueZeroSet.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/helpers/ShrinkBigInt.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/helpers/ShrinkInteger.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/helpers/StrictlyEqualSet.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/helpers/TextEscaper.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/helpers/ToggleFlags.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/helpers/ZipIterableIterators.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/implementations/SchedulerImplem.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/implementations/SlicedBasedGenerator.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/mappers/CharsToString.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/mappers/CodePointsToString.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/mappers/IndexToCharString.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/mappers/NatToStringifiedNat.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/mappers/NumberToPaddedEight.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/mappers/PaddedEightsToUuid.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/mappers/PartsToUrl.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/mappers/PatternsToString.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/mappers/SegmentsToPath.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/mappers/TimeToDate.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/mappers/UintToBase32String.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/mappers/UnboxedToBoxed.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/mappers/VersionsApplierForUuid.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/_internals/mappers/WordsToLorem.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/array.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/ascii.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/asciiString.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/base64.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/base64String.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/bigInt.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/bigIntN.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/bigUint.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/bigUintN.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/char.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/char16bits.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/commands.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/compareBooleanFunc.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/compareFunc.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/constant.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/constantFrom.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/date.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/dictionary.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/domain.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/double.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/emailAddress.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/float.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/float32Array.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/float64Array.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/fullUnicode.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/fullUnicodeString.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/func.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/hexa.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/hexaString.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/integer.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/jsonValue.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/lorem.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/mapToConstant.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/nat.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/oneof.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/option.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/record.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/sparseArray.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/string.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/string16bits.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/stringMatching.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/stringOf.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/unicode.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/unicodeJsonValue.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/unicodeString.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/uniqueArray.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/uuid.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/uuidV.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/webAuthority.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/webPath.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/arbitrary/webUrl.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/check/model/ModelRunner.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/check/model/ReplayPath.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/check/model/commands/CommandsIterable.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/check/precondition/Pre.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/check/property/AsyncProperty.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/check/property/Property.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/check/runner/Runner.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/check/runner/Sampler.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/check/runner/SourceValuesIterator.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/check/runner/Tosser.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/check/runner/configuration/GlobalParameters.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/check/runner/configuration/QualifiedParameters.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/check/runner/reporter/RunExecution.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/check/symbols.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/random/generator/Random.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/utils/hash.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/fast-check/test/unit/utils/stringify.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/jest/src/internals/TestBuilder.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/jest/src/internals/TestBuilder.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/jest/src/internals/TestWithPropRunnerBuilder.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/jest/src/internals/TestWithPropRunnerBuilder.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/jest/src/internals/types.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/jest/src/jest-fast-check-worker.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/jest/src/jest-fast-check.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/jest/test-types/main.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/jest/test/jest-fast-check.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/jest/test/jest-fast-check.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/jest/test/jest-fast-check.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/jest/test/jest-fast-check.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/jest/test/types.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/vitest/src/internals/TestBuilder.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/vitest/src/internals/TestBuilder.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/vitest/src/internals/TestWithPropRunnerBuilder.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/vitest/src/internals/TestWithPropRunnerBuilder.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/vitest/src/internals/types.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/vitest/src/vitest-fast-check.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/vitest/test-types/main.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/vitest/test/vitest-fast-check.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/vitest/test/vitest-fast-check.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/vitest/test/vitest-fast-check.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/vitest/test/vitest-fast-check.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/worker/src/internals/MainThreadRunner.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/worker/src/internals/SharedTypes.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/worker/src/internals/ValueFromState.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/worker/src/internals/ValueFromState.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/worker/src/internals/worker-property/NoopWorkerProperty.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/worker/src/internals/worker-property/WorkerPropertyBuilder.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/worker/src/internals/worker-property/WorkerPropertyBuilder.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/worker/src/internals/worker-property/WorkerPropertyFromWorker.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/worker/src/internals/worker-property/WorkerPropertyFromWorker.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/worker/src/internals/worker-runner/WorkerRunner.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/worker/src/main.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/worker/src/main.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/worker/test-types/main.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/worker/test/e2e/asyncThrow.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/worker/test/e2e/blockEventLoop.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/worker/test/e2e/concurrentAssert.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/worker/test/e2e/failing.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/worker/test/e2e/noWorker.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/worker/test/e2e/nonSerializableButSameData.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/worker/test/e2e/nonSerializableButSameData.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/worker/test/e2e/nonSerializableData.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/worker/test/e2e/passing.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/worker/test/e2e/predicateIsolation.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/worker/test/e2e/propertyIsolation.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/worker/test/e2e/supportPre.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/worker/test/e2e/syncThrow.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/worker/test/e2e/unregistered.spec.ts:2
Info: TypeScriptPropertyBasedTesting integration found: packages/worker/test/internals/worker-property/WorkerPropertyFromWorker.spec.ts:2

10

License

Determines if the project has defined a license.

10

Maintained

Determines if the project is "actively maintained".

10

Packaging

Determines if the project is published as a package that others can easily download, install, easily update, and uninstall.

10

Pinned-Dependencies

Determines if the project has declared and pinned the dependencies of its build process.

10

SAST

Determines if the project uses static code analysis.

10

Security-Policy

Determines if the project has published a security policy.

10

Token-Permissions

Determines if the project's workflows follow the principle of least privilege.

7

Vulnerabilities

Determines if the project has open, known unfixed vulnerabilities.

6

Contributors

Determines if the project has a set of contributors from multiple organizations (e.g., companies).

5

CII-Best-Practices

Determines if the project has an OpenSSF (formerly CII) Best Practices Badge.

3

Branch-Protection

Determines if the default and release branches are protected with GitHub's branch protection settings.

Score

8.9

/10

Last Scanned on 2024-11-29T22:10:06Z

The Open Source Security Foundation is a cross-industry collaboration to improve the security of open source software (OSS). The Scorecard provides security health metrics for open source projects.

Learn More

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