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
76–100 sur 568, mesurés par des échantillons publiés.
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gemContrat d'échantillonruby · linux/x64activesupport@8.1.3.1
On croitActiveSupport::TimeZone#parse retains the parsed string's offset or assigns wall-clock time directly without zone conversion, and raises ArgumentError on invalid date strings like standard Time.parse.
MesuréActiveSupport::TimeZone#parse with an explicit UTC offset converts the instant into the receiver's time zone representation rather than retaining the string's offset or treating the wall-clock time as local.
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pypiContrat d'échantillonpython · linux/x64greenlet@3.5.4
On croitA newly created greenlet automatically inherits the active contextvars context of the parent greenlet that spawned it, and setting context variables inside the greenlet alters the ambient context seen by the parent upon returning.
MesuréA newly created greenlet starts with gr_context as None and executes within a fresh isolated contextvars Context that does not inherit the caller greenlet's ContextVar values, unless a Context is explicitly assigned to gr_context prior to switching.
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golangContrat d'échantillongo · linux/x64gopkg.in/yaml.v3@v3.0.1
On croitUnmarshaling a YAML mapping directly into *yaml.Node produces a MappingNode whose Content slice holds child values.
Mesuréyaml.Unmarshal into *yaml.Node produces a root DocumentNode with Kind 1 whose Content slice wraps the top-level MappingNode (Kind 4) at index 0 rather than returning a MappingNode directly.
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npmContrat d'échantillonnode · linux/x64ajv@8.20.0
On croitSetting removeAdditional true in Ajv options strips all undeclared properties from validated objects regardless of whether additionalProperties false is present in the schema
MesuréAjv with removeAdditional true removes undeclared properties from validated objects only when additionalProperties false is explicitly specified in the schema, retaining undeclared properties when additionalProperties is omitted.
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npmContrat d'échantillonnode · linux/x64uuid@14.0.1
On croitUUIDv1 strings sort chronologically by generation time, or converting between UUID versions requires manually decoding and recalculating timestamp fields
MesuréUUIDv7 with identical timestamps sorts strictly by sequence number
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cargoContrat d'échantillonrust · linux/x64once_cell@1.21.4
On croitA common belief is that OnceCell initialization failure permanently poisons the cell preventing subsequent retry, or that unsync::OnceCell allows recursive initialization without panicking.
Mesuréget_or_try_init leaves the OnceCell uninitialized upon receiving Err, enabling subsequent initialization attempts to retry and succeed without cell poisoning
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npmContrat d'échantillonnode · linux/x64yoga-layout@3.2.1
On croitSetting explicit dimensions with padding and border calculates content-box size like web CSS, and container overflow automatically shrinks child items without configuring web defaults.
MesuréYoga 3 defaults node box-sizing to BoxSizing.BorderBox (0) where fixed dimensions include padding and border, expanding computed bounds only when switched to BoxSizing.ContentBox (1)
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golangContrat d'échantillongo · linux/x64golang.org/x/sync@v0.22.0
On croitsingleflight.Group.DoChan returns a shared broadcast channel that closes after sending, blocks the worker if an abandoned caller stops receiving, and does not deduplicate against synchronous Do.
Mesuréassert singleflight.Group.DoChan allocates a distinct buffered channel of capacity 1 for each caller so concurrent readers do not compete or consume each other's results
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pypiContrat d'échantillonpython · linux/x64pytest@9.0.3
On croitpytest.approx(0.0) matches small floating point numbers like 1e-7 using the default 1e-6 relative tolerance
Mesurépytest.approx(0.0) compares against zero using exclusively the absolute tolerance (defaulting to 1e-12) because relative tolerance scales to zero, causing 1e-7 == approx(0.0) to evaluate to False unless abs is explicitly set
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npmContrat d'échantillonnode · linux/x64lodash-es@4.18.1
On croitdefaultsDeep returns a new cloned object without mutating the destination and concatenates or overwrites entire arrays when applying nested defaults.
MesurédefaultsDeep mutates the destination object in-place and merges array elements index-by-index rather than replacing or concatenating them
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golangContrat d'échantillongo · linux/x64github.com/jackc/pgx/v5@v5.10.0
On croitCollectOneRow errors when multiple rows match, empty PostgreSQL ranges scan as Valid=false like SQL NULL, and PostgreSQL infinity timestamps scan into time.Time
MesuréCollectOneRow consumes the first row without error on multi-row results whereas CollectExactlyOneRow rejects multiple rows with ErrTooManyRows
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golangContrat d'échantillongo · linux/x64github.com/google/go-cmp@v0.7.0
On croitStandard library error values can be compared directly with cmp.Equal or cmp.Diff like other basic Go types.
MesuréComparing standard error values without cmpopts.EquateErrors panics at runtime because standard errors contain unexported struct fields
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npmContrat d'échantillonnode · linux/x64nanoid@6.0.1
On croitNegative size arguments passed to nanoid/non-secure functions are expected to throw a RangeError matching cryptographic nanoid behavior.
Mesurénanoid/non-secure functions return an empty string for negative or non-positive sizes rather than throwing RangeError like root nanoid
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npmContrat d'échantillonnode · linux/x64fs-extra@11.3.0
On croitfs.move overwrites existing destination files by default like fs.copy and Node's fs.rename, and requires destination parent directories to already exist
Mesuréfs.move rejects with 'dest already exists.' when destination exists unless overwrite: true is explicitly passed, while fs.copy defaults overwrite to true
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pypiContrat d'échantillonpython · linux/x64markupsafe@3.0.3
On croitescape() decodes UTF-8 byte sequences before HTML-escaping them, and str.join() escapes raw strings when concatenating with Markup elements.
Mesuréescape() converts bytes objects via str() to their literal repr 'b\'...\'' and escapes the resulting quotes rather than decoding UTF-8 bytes, requiring Markup(data, encoding) for explicit byte decoding.
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pypiContrat d'échantillonpython · linux/x64structlog@26.1.0
On croitCalling bind_contextvars automatically propagates context variables to all structlog loggers without requiring merge_contextvars in the processor chain.
MesuréCalling bind_contextvars has no effect on log output unless merge_contextvars is explicitly present in the processor chain, and bound logger fields override conflicting context variables.
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pypiContrat d'échantillonpython · linux/x64packaging@24.2
On croitparse_wheel_filename preserves unnormalized distribution names and parses build tags as plain strings or leaves compressed wheel tags unexpanded
Mesuréparse_wheel_filename returns a 4-tuple of canonicalized name, parsed Version, integer-prefixed build tag tuple, and Cartesian-product expanded Tag frozenset, rejecting build tags without a leading digit.
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golangContrat d'échantillongo · linux/x64google.golang.org/protobuf@v1.36.12
On croitproto.Merge replaces repeated slice fields with the source list and ignores explicit zero values for optional fields, while reflect.DeepEqual can safely compare protobuf messages.
Mesuréproto.Merge appends repeated slice elements rather than replacing them, leaves destination scalars untouched when source holds implicit zero values, overwrites destination when source explicitly sets proto3 optional zero values, and recursively merges nested message fields.
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pypiContrat d'échantillonpython · linux/x64python-dotenv@1.2.2
On croitA model would expect single quotes to expand escape sequences identically to double quotes, and for inline comments to consistently require or not require preceding whitespace.
Mesurédotenv_values expands \n to an actual newline only inside double quotes, and treats # as a comment only if it follows a space (when unquoted) or immediately follows a closing quote.
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pypiContrat d'échantillonpython · linux/x64pycparser@2.22
On croitpycparser can automatically skip or handle standard preprocessor directives like #include when parsing C source.
MesuréCParser().parse() raises ParseError with 'Directives not supported yet' when given C code containing #include <stdio.h>, rather than successfully ignoring or processing it.
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golangContrat d'échantillongo · linux/x64github.com/lmittmann/tint@v1.2.0
On croittint formats AddSource as a standard key-value attribute at the end of the log line matching slog.TextHandler conventions.
Mesurétint.NewTextHandler formats source code locations directly between the level badge and log message as a faint prefix instead of a trailing key-value pair, and allows complete suppression or replacement via ReplaceAttr
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pypiContrat d'échantillonpython · linux/x64markupsafe@3.0.3
On croitMarkup.format() treats objects returning str from __html__() as pre-escaped HTML identically to escape() and % interpolation.
MesuréMarkup.format() escapes plain str returns from __html__() into HTML entities because EscapeFormatter wraps format_field results in escape(), requiring __html__() to return Markup or define __html_format__ for unescaped formatting
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cargoContrat d'échantillonrust · linux/x64rustls@0.23.43
On croitResolvesServerCertUsingSni accepts wildcard domain patterns or IP literals as registration keys and serves any mapped certificate without validating its Subject Alternative Names against the domain key
Mesurérustls ResolvesServerCertUsingSni::add strictly rejects wildcard patterns and IP literals as registration keys and validates that the certified key's SAN matches the registered DNS domain
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pypiContrat d'échantillonpython · linux/x64packaging@24.1
On croita pre-release like 2.1a1 is contained in the range >=2.0 because it evaluates as strictly greater than 2.0
MesuréSpecifierSet('>=2.0').contains('2.1a1') returns False rather than True, because pre-releases are silently excluded from version ranges by default under PEP 440.
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cargoContrat d'échantillonrust · linux/x64thiserror@2.0.20
On croit#[error(transparent)] causes Error::source to return the wrapped error as Some(&inner)
MesuréCalling Error::source on an error deriving Error with #[error(transparent)] delegates directly to inner.source(), returning None when wrapping a root error and omitting the wrapped type from the error cause chain.
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.