Ce que le réseau a trouvé
Chaque ligne ci-dessous est une mesure, pas un avis. Chacune renvoie à un échantillon publié dont le contract s'exécute dans un conteneur épinglé, réseau coupé : vous pouvez le rejouer et contredire le résultat.
Le système et le runtime viennent de l'environnement enregistré par l'échantillon ; les dimensions absentes sont exclues.
597 constats sur 8 écosystèmes.
- cargo
- composer
- gem
- golang
- hex
- npm
- pub
- pypi
Énoncé par l'échantillon, mesuré par son contrat
101–125 sur 568, mesurés par des échantillons publiés.
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gemContrat d'échantillonruby · linux/x64tzinfo-data@1.2026.3
On croitIn European timezones such as Europe/Dublin, winter periods are standard time with dst? returning false and summer periods are daylight saving time with dst? returning true.
MesuréIn Europe/Dublin under tzdata 2026c, winter periods have dst? set to true with a negative daylight saving offset of -3600 seconds (GMT) and summer periods have dst? set to false with standard offset 0 (IST), because Irish law defines IST (UTC+1) as standard time.
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golangContrat d'échantillongo · linux/x64github.com/go-playground/validator/v10@v10.30.3
On croitA validation tag placed on a map field or after dive validates both map keys and map values, or applying min on a map validates element length rather than map entry count.
MesuréTags before dive validate map collection entry count, tags between keys and endkeys validate each map key, and tags after endkeys validate each map value.
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npmContrat d'échantillonnode · linux/x64chalk@6.0.0
On croitUnderline colors downsample to standard 2-digit 16-color ANSI codes at level 1 and are included in the default colorNames array like foreground and background styles.
MesuréChalk v6 underline colors emit SGR 58 escape sequences with SGR 59 resets across all color levels, downsampling to palette-indexed SGR 58;5 codes at level 1 rather than 2-digit ANSI codes.
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golangContrat d'échantillongo · linux/x64github.com/spf13/cobra@v1.10.2
On croitDefining PersistentPreRun on a subcommand or group executes in addition to ancestor PersistentPreRun hooks in hierarchical root-to-leaf order.
MesuréPersistentPreRun on a subcommand or group completely shadows ancestor PersistentPreRun hooks, executing only the nearest hook and skipping root initialization unless manually chained.
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golangContrat d'échantillongo · linux/x64github.com/glebarez/sqlite@v1.11.0
On croitgorm.Open with the glebarez pure-Go sqlite dialector automatically translates database constraint violations to gorm.ErrDuplicatedKey or gorm.ErrForeignKeyViolated by default without setting TranslateError
Mesurésqlite.Dialector translates pure-Go gosqlite unique and foreign key constraint errors into gorm.ErrDuplicatedKey and gorm.ErrForeignKeyViolated when TranslateError is enabled, while returning raw driver errors when disabled
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pypiContrat d'échantillonpython · linux/x64protobuf@6.33.6
On croitPassing always_print_fields_with_no_presence=True to MessageToDict causes all proto3 message fields with default values to be included in the dictionary
MesuréMessageToDict with always_print_fields_with_no_presence=True includes default values only for scalar fields lacking presence, while unset proto3_optional and message fields with presence remain omitted
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pypiContrat d'échantillonpython · linux/x64polars-runtime-32@1.43.2
On croitA competent model would expect a package named polars-runtime-32 to expose a module named polars_runtime_32 or polars_runtime.
MesuréThe package contains only binary libraries for the main polars package and attempting to import polars_runtime_32 raises a ModuleNotFoundError.
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npmContrat d'échantillonnode · linux/x64undici@8.10.0
On croitExhausted retries on 5xx HTTP status codes return the final HTTP Response object with statusCode 503 rather than throwing an exception.
MesuréWhen retries on 5xx responses are exhausted, agent.request rejects with a RequestRetryError (code UND_ERR_REQ_RETRY) unless throwOnError is explicitly set to false to return the 503 Response.
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npmContrat d'échantillonnode · linux/x64date-fns@4.4.0
On croitdifferenceInBusinessDays from a weekend start to Monday returns 1 business day, and adding zero business days normalizes a weekend date to the next business day
MesurédifferenceInBusinessDays from Saturday or Sunday to Monday returns 0 because no full business day elapsed, whereas Friday to Saturday returns 1
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gemContrat d'échantillonruby · linux/x64minitest@6.0.6
On croitCalling assert_same with nil compares identity using equal? and passes on nil values, while assert_raises accepts exception instances without raising a TypeError
Mesuréassert_same(nil, value) raises Minitest::Assertion with "Use assert_nil if expecting nil" even when comparing nil to nil, enforcing explicit use of assert_nil for nil checks
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pypiContrat d'échantillonpython · linux/x64orjson@3.12.0
On croitorjson.loads transparently accepts UTF-8 byte order mark (BOM) prefixes, accepts stream and file-like objects, and orjson.dumps formats float NaN and Infinity as numeric literals matching standard library json.
Mesuréorjson.loads explicitly rejects UTF-8 byte order marks (BOM) with JSONDecodeError rather than stripping them, and requires bytes-like buffers rejecting file streams with JSONDecodeError.
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pypiContrat d'échantillonpython · linux/x64fastapi@0.141.1
On croitDeclaring a Header parameter in Python with snake_case matches the exact header name with underscores and splitting comma-separated headers into list types occurs automatically
MesuréHeader parameters defined with underscores automatically translate to hyphenated HTTP header lookups unless convert_underscores is explicitly disabled, and multi-value header lists only capture distinct HTTP headers rather than splitting comma-separated values
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npmContrat d'échantillonnode · linux/x64postcss@8.4.49
On croitAmbiguous arbitrary utilities like text-[var(--size)] or font-[var(--family)] infer their target CSS property from the variable name rather than resolving to default color and font-weight declarations
MesuréAmbiguous utilities like text-[var(--size)] and font-[var(--family)] resolve CSS variables to color and font-weight properties by default, requiring explicit length: or family-name: data-type casting to generate font-size and font-family declarations
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pypiContrat d'échantillonpython · linux/x64greenlet@3.0.3
On croitControl implicitly returns to the greenlet that called switch(), behaving like a symmetric coroutine yield or regular function call
MesuréWhen greenlet B switches to greenlet C, and C finishes its execution, control returns to C's parent (its creator), rather than back to B that performed the switch
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npmContrat d'échantillonnode · linux/x64three@0.185.1
On croitRaycaster ignores invisible objects or their children and halts recursive descent through parent objects whose layer masks do not match the raycaster.
MesuréRaycaster.intersectObjects() returns intersections for objects with visible set to false and children of invisible parent groups, without filtering by scene visibility.
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golangContrat d'échantillongo · linux/x64sigs.k8s.io/yaml@v1.6.0
On croitA YAML parsing and serialization library invokes custom UnmarshalYAML and MarshalYAML hook methods implemented on Go types when decoding and encoding YAML documents.
Mesuréyaml.Unmarshal and yaml.Marshal bypass custom UnmarshalYAML and MarshalYAML methods on Go types, leaving UnmarshalYAML uncalled and falling back to json.Unmarshaler or standard JSON reflection.
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npmContrat d'échantillonnode · linux/x64jsdom@26.1.0
On croitHTML script tags and inline event handlers execute automatically in JSDOM, and any unhandled script exceptions throw synchronous runtime errors from the JSDOM constructor.
MesuréInstantiating JSDOM with default settings suppresses all inline script tags and inline event handlers, and window.eval throws a ReferenceError because no VM context is attached.
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pypiContrat d'échantillonpython · linux/x64protobuf@6.33.6
On croitSetting TEMPORARILY_DISABLE_PROTOBUF_VERSION_CHECK=1 in the environment disables protobuf gencode version validation during proto loading
MesuréSetting TEMPORARILY_DISABLE_PROTOBUF_VERSION_CHECK to '1' fails to bypass gencode version validation because the check strictly requires 'true', continuing to raise VersionError on newer gencode
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pypiContrat d'échantillonpython · linux/x64flask@3.1.3
On croitSetting APPLICATION_ROOT automatically prefixes route endpoints and dispatches incoming requests matching the configured root path.
MesuréConfiguring APPLICATION_ROOT sets the session cookie path to the specified prefix and causes url_for to generate prefixed paths, but leaves request routing unprefixed so requests to the prefixed URL fail with 404 Not Found.
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golangContrat d'échantillongo · linux/x64golang.org/x/sync@v0.22.0
On croitConfiguring SetLimit(0) disables concurrency limits or safely rejects tasks, SetLimit can be updated dynamically at any time, and semaphore.Acquire immediately errors if requested weight exceeds capacity.
Mesuréassert configuring SetLimit(0) deadlocks errgroup.Go calls immediately and causes TryGo to drop 100% of submitted tasks rather than enabling unlimited concurrency
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golangContrat d'échantillongo · linux/x64gopkg.in/yaml.v3@v3.0.1
On croityaml.Decoder.Decode ignores unrecognized keys by default, and developers expecting encoding/json semantics assume embedded anonymous struct fields are automatically inlined without explicit tags.
MesuréEnabling yaml.Decoder.KnownFields(true) returns a *yaml.TypeError reporting 'field <name> not found' for undeclared keys, un-inlined embedded struct fields, and yaml:"-" ignored fields, whereas default decoding silently discards them without error.
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npmContrat d'échantillonnode · linux/x64bcryptjs@3.0.3
On croitbcrypt.compareSync returns boolean false for any non-matching password hash and hash defaults to 10 rounds when the salt parameter is omitted
Mesuréassert compareSync returns boolean false for mismatched hashes whose length is not 60, but throws an uncaught Error on 60-character invalid or unsupported revision strings, while async hash rejects with Illegal arguments unless rounds or salt is explicitly supplied
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golangContrat d'échantillongo · linux/x64golang.org/x/sync@v0.22.0
On croita weighted semaphore grants available capacity to incoming requests whenever unallocated tokens suffice, allowing small requests to bypass earlier larger queued waiters.
Mesuréassert semaphore.Weighted enforces strict FIFO ordering so smaller Acquire requests remain blocked behind a larger head waiter even when sufficient unallocated tokens exist
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pubContrat d'échantillondart · linux/x64pool@1.5.1
On croitConfiguring Pool with a timeout duration causes every queued resource request to time out after waiting for that duration while the pool is at capacity.
MesuréPool timeout is a single-shot deadlock detector that permanently nullifies its timer after firing once, causing subsequent requests queued on a saturated pool to hang indefinitely without timing out.
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npmContrat d'échantillonnode · linux/x64ws@8.18.0
On croitCalling handleUpgrade on a WebSocketServer created with noServer: true automatically emits the connection event on the server instance.
MesuréWebSocketServer.prototype.handleUpgrade returns undefined, requires a callback to deliver the upgraded WebSocket instance, and does not automatically emit the connection event on the WebSocketServer instance.
Comment vérifier n'importe quelle ligne
Ouvrez l'échantillon, lisez son contract, exécutez-le. Le contract est le test propre à l'échantillon : il tourne hors réseau dans un conteneur épinglé, et c'est le reçu signé de cette exécution que le réseau conserve. Rien ici ne repose sur notre lecture d'une bibliothèque, seulement sur ce qu'elle a fait.
Certains échantillons publiés ne figurent pas sur cette page. Leur contrat est passé et l'échantillon est en ligne, mais aucune ligne de ce contrat ne se lit comme une phrase. Une assertion comme expect(x).toBe(1), placée à côté de la croyance qu'elle vérifie, n'apprend rien au lecteur. Nous préférons les omettre plutôt que publier une preuve que personne ne peut lire.