Lo que la red encontró
Cada línea de abajo es una medición, no una opinión. Todas enlazan a una muestra publicada cuyo contract se ejecuta en un contenedor fijado y sin red, así que puedes volver a ejecutarlo y contradecir el resultado.
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597 hallazgos en 8 ecosistemas.
- cargo
- composer
- gem
- golang
- hex
- npm
- pub
- pypi
Lo que dice la muestra y mide su contrato
176–200 de 568, medidos por muestras publicadas.
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gemContrato de muestraruby · linux/x64mustermann@4.0.0
Se creeMustermann pattern matching always requires full string matches, and string interpolation of pattern objects safely preserves named parameter boundaries without altering AST capture names.
MedidoMustermann patterns anchored to string boundaries return nil on subpaths when using match or params, but peek_params performs unanchored prefix matching and returns both extracted params and the consumed character offset for stepwise sub-routing.
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golangContrato de muestrago · linux/x64github.com/go-chi/chi/v5@v5.3.1
Se creemiddleware.Timeout enforces a hard wall-clock timeout by asynchronously aborting the handler and returning 504 Gateway Timeout even if the handler blocks or writes data.
MedidoWhen a handler cooperatively returns upon ctx.Done() without writing to ResponseWriter, middleware.Timeout writes HTTP 504 StatusGatewayTimeout with an empty body.
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gemContrato de muestraruby · linux/x64set@1.1.3
Se creeSet#<=> provides a total ordering across any sets so arrays of sets can be sorted with Array#sort.
MedidoSet#<=> returns nil when neither set is a subset of the other, which causes Array#sort on incomparable sets to raise ArgumentError.
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pypiContrato de muestrapython · linux/x64six@1.17.0
Se creesix.b encodes any text to bytes and accepts existing bytes idempotently, six.u coerces bytes to str, and six.byte2int coerces integer inputs while defaulting empty bytes to zero
Medidosix.b strictly encodes strings using latin-1 raising UnicodeEncodeError on code points above 255 and AttributeError on existing bytes rather than coercing via UTF-8 or acting idempotently
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pypiContrato de muestrapython · linux/x64six@1.17.0
Se creeAccessing moved attributes on six.moves or its classes returns the descriptor or resolved object identically without mutating class state, and six.remove_move cleans up import hooks alongside attribute access
MedidoAccessing an attribute on six.moves or its lazy namespaces resolves the target, caches it in the instance dictionary, and deletes the lazy descriptor from the class dictionary, making class-level attribute access fail with AttributeError
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golangContrato de muestrago · linux/x64go.opentelemetry.io/otel/sdk@v1.45.0
Se creeresource.Merge returns a nil Resource pointer when encountering an ErrSchemaURLConflict between resources with different schema URLs.
Medidoresource.Merge with conflicting non-empty schema URLs returns a non-nil Resource with SchemaURL set to empty string alongside ErrSchemaURLConflict while merging attributes
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golangContrato de muestrago · linux/x64go.opentelemetry.io/otel@v1.28.0
Se creeExtracting from a request with multiple traceparent headers ignores them completely as mandated by the W3C Trace Context specification.
MedidoExtracting from a HeaderCarrier with two traceparent headers yields the SpanContext of the first header rather than an invalid, empty context.
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pypiContrato de muestrapython · linux/x64six@1.17.0
Se creesix.reraise(tp, value, tb) accepts a string message as value and instantiates tp(value) like Python 2's raise statement, and six.raise_from(exc, None) retains implicit exception context.
Medidosix.reraise requires value to be an exception instance or None and raises AttributeError when passed a string message, unlike Python 2 raise syntax
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pypiContrato de muestrapython · linux/x64six@1.17.0
Se creesix.int2byte raises standard built-in ValueError or TypeError for invalid integer inputs like Python 2 chr() or Python 3 bytes constructor, and six.remove_move raises KeyError for nonexistent moves
Medidosix.int2byte raises struct.error rather than built-in ValueError or TypeError when passed out-of-range integers or non-integer types because it is implemented via struct.Struct.pack in Python 3
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pypiContrato de muestrapython · linux/x64pydantic@2.13.4
Se creePydantic models validate and coerce all field defaults against annotated types and constraints during default instantiation.
MedidoLeaving validate_default unset defaults to False: uncoerced string defaults remain raw strings and constraint-violating defaults are assigned directly without validation errors.
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pypiContrato de muestrapython · linux/x64pydantic@2.13.4
Se creeSerializing a Pydantic model to JSON and parsing it back with model_validate_json preserves the original plaintext secret or raises a validation error.
Medidomodel_dump_json masks SecretStr and SecretBytes to asterisks, and subsequent model_validate_json silently parses the mask string as the new secret value instead of preserving the secret or raising an error.
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golangContrato de muestrago · linux/x64go.opentelemetry.io/otel/sdk@v1.45.0
Se creeCapacity limits on a span apply a uniform dropping strategy, meaning both attributes and events would drop the newest entries or both would drop the oldest entries.
MedidoWhen AttributeCountLimit is 3 and five attributes are added in order a0…a4, span.Attributes() contains exactly the first three (a0, a1, a2), not the last three — new arrivals are silently dropped, not old ones.
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pypiContrato de muestrapython · linux/x64pydantic@2.13.4
Se creePassing a set of field names like {'members': {'secret'}} to model_dump(exclude=...) excludes that field from each nested model in a sequence.
MedidoPassing a bare field set like {'members': {'secret'}} to model_dump(exclude=...) silently leaves secrets present in nested sequence elements because collection keys represent item indices rather than attribute names.
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pubContrato de muestradart · linux/x64args@2.7.0
Se creeArgResults returns an isolated or unmodifiable list for multi-option default values on each parse rather than sharing a mutable reference to the parser's internal default list.
MedidoArgResults.multiOption returns the exact mutable defaultsTo list instance stored in Option without copying, causing identical() to return true across distinct parse calls and leaking in-place mutations into subsequent parses.
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npmContrato de muestranode · linux/x64react@18.3.1
Se creestartTransition defers callback execution asynchronously or returns a Promise that keeps async continuations within the transition context.
MedidostartTransition executes its callback synchronously on the calling thread, returns undefined rather than a Promise, and resets ReactCurrentBatchConfig.transition to null immediately before returning so asynchronous continuations run outside the transition context.
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golangContrato de muestrago · linux/x64go.opentelemetry.io/otel/sdk@v1.24.0
Se creeParentBased(NeverSample()) disables span sampling across all spans created by the TracerProvider
MedidoParentBased(NeverSample()) samples and exports child spans when the context contains a sampled remote parent, because ParentBased delegates sampled remote parents to AlwaysSample() by default rather than the configured root sampler.
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golangContrato de muestrago · linux/x64go.opentelemetry.io/otel/sdk@v1.37.0
Se creeAlwaysSample().Description() returns "AlwaysSample" and NeverSample().Description() returns "NeverSample" matching their Go constructor identifiers
MedidoAlwaysSample().Description() returns "AlwaysOnSampler" and NeverSample().Description() returns "AlwaysOffSampler" using OpenTelemetry specification names rather than Go constructor names
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pypiContrato de muestrapython · linux/x64httpx@0.28.1
Se creeSubclassing Auth to inspect streaming request bodies or handle 401 challenge retries can be done by accessing request.content directly or yielding requests without explicit body buffering flags, and Authorization headers are automatically retained across all followed redirects.
MedidoAccessing request.content on streaming requests inside auth_flow raises RequestNotRead unless requires_request_body is set to True
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pypiContrato de muestrapython · linux/x64httpx@0.28.1
Se creeConverting Headers and QueryParams to standard Python dictionaries preserves all multi-value items or maps duplicate keys to lists.
MedidoConverting Headers to a standard dictionary collapses duplicate header keys into a single comma-delimited string rather than preserving discrete wire occurrences or lists.
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pypiContrato de muestrapython · linux/x64httpx@0.28.1
Se creeJoining a relative path to an httpx.URL always appends to the full path prefix of the base URL
Medidohttpx.URL.join on a base path lacking a trailing slash replaces the final path segment rather than appending to it
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npmContrato de muestranode · linux/x64@babel/preset-env@7.26.0
Se creeisPluginRequired accepts shorthand target versions such as chrome '80' matching Babel configuration presets, and returns false when targets is empty since no target platforms require compilation.
MedidoisPluginRequired throws a semver validation error when targets specifies a non-triplet version like '80' while support data allows '79', returns false when target version 80.0.0 meets support version 79, and returns true when targets is empty or includes unspecified environments.
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pypiContrato de muestrapython · linux/x64httpx@0.28.1
Se creehttpx.InvalidURL inherits from httpx.HTTPError and catching httpx.HTTPError catches URL formatting errors
Medidohttpx.InvalidURL inherits directly from builtins.Exception rather than httpx.HTTPError or httpx.RequestError, so catching httpx.HTTPError fails to catch URL validation failures.
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npmContrato de muestranode · linux/x64express@4.21.0
Se creeres.format requires handlers to set their own Content-Type header and falls back to a 200 response or uncaught exception when the Accept header is unmatched
Medidores.format automatically sets the Vary: Accept header and pre-populates Content-Type matching the negotiated format before executing the handler
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npmContrato de muestranode · linux/x64express@4.21.2
Se creerouter.param callbacks defined on a child router with mergeParams: true execute for all named parameters present in req.params during route handling.
MedidoExpress router.param callbacks only execute when the parameter placeholder is declared in the matching route's own path pattern, ignoring inherited parameters populated on req.params by mergeParams: true.
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npmContrato de muestranode · linux/x64express@5.2.1
Se creeA good model would confidently expect that query parameters configured or named to represent collections will always parse as an array if present, or that ?id[]=1 syntax forces an array type.
Medidoreq.query.id parses ?id=1 as the string '1', not an array.
Cómo comprobar cualquier línea de aquí
Abre la muestra, lee su contract y ejecútalo. El contract es la propia prueba de la muestra: se ejecuta sin red en un contenedor fijado, y el recibo firmado de esa ejecución es lo que la red guarda. Nada de esto depende de cómo leamos una biblioteca, solo de lo que la biblioteca hizo.
Algunas muestras publicadas no están en esta página. Su contrato pasó y la muestra está activa, pero ninguna línea de ese contrato se lee como una frase. Una aserción como expect(x).toBe(1), puesta junto a la creencia que comprueba, no le dice nada a quien lee. Preferimos dejarlas fuera antes que publicar pruebas que nadie puede leer.