O que a rede encontrou
Cada linha abaixo é uma medição, não uma opinião. Todas apontam para uma amostra publicada cujo contract é executado em um contêiner fixado e sem rede, então você pode reexecutá-lo e discordar do resultado.
O sistema e o runtime vêm do ambiente registrado pela amostra; dimensões ausentes são excluídas ao filtrar.
597 achados em 8 ecossistemas.
- cargo
- composer
- gem
- golang
- hex
- npm
- pub
- pypi
O que a amostra afirma e o contrato dela mede
126–150 de 568, medidos por amostras publicadas.
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pubContrato da amostradart · linux/x64json_annotation@4.9.0
Acredita-seA model expects JsonSerializable.fromJson to accept camelCase Dart option names, unknownEnumValue to serve as a fallback when an enum field is null, and disallowNullValues to reject missing keys.
MedidoJsonSerializable.fromJson enforces snake_case option keys and disallowUnrecognizedKeys, throwing a CheckedFromJsonException with badKey true on camelCase Dart property names
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golangContrato da amostrago · linux/x64github.com/goccy/go-yaml@v1.19.2
Acredita-seyaml.Unmarshal silently accepts duplicate mapping keys and overwrites earlier occurrences with later ones.
Medidoassert yaml.Unmarshal rejects duplicate mapping keys with a SyntaxError by default, leaving destination values empty
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pypiContrato da amostrapython · linux/x64cffi@2.0.0
Acredita-seCalling ffi.string with maxlen reads the full byte length regardless of null bytes, and ffi.buffer on a pointer defaults to the full allocated buffer length.
MedidoCalling ffi.string(cdata, maxlen) truncates at the first null byte rather than reading maxlen bytes, while ffi.unpack extracts the exact byte count across embedded nulls.
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pubContrato da amostradart · linux/x64http@1.6.0
Acredita-seTop-level HTTP convenience functions executed inside runWithClient reuse a shared ambient client instance without closing it after each request.
MedidoTop-level HTTP convenience functions inside runWithClient instantiate a client via the client factory and close it upon completion, causing subsequent requests on a singleton client factory to fail with ClientException.
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npmContrato da amostranode · linux/x64typescript@5.9.3
Acredita-seTypeScript automatically elides type-only named imports and unused value imports during ECMAScript emit regardless of whether type keywords or verbatimModuleSyntax are configured.
MedidoWhen compilerOptions.verbatimModuleSyntax is enabled, importing a type without the type modifier fails type-checking with TS1484, and re-exporting a type without export type fails with TS1205, whereas type-only imports and inline type specifiers compile cleanly and are elided during emit.
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npmContrato da amostranode · linux/x64vitest@3.2.7
Acredita-semergeConfig replaces array options like test.include and test.reporters with override values and supports function config factories.
MedidomergeConfig concatenates array options like test.include, test.exclude, and test.reporters rather than replacing them, appending override test filters to base patterns.
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pubContrato da amostradart · linux/x64convert@3.1.2
Acredita-seCodePage.encode and CodePage.decode silently replace unmapped characters or undefined bytes with fallback tokens rather than throwing FormatException.
MedidoCodePage.encode throws FormatException on unmapped characters unless configured with an in-range invalidCharacter byte, and CodePage.decode throws FormatException on undefined byte entries unless allowInvalid is set to true.
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npmContrato da amostranode · linux/x64browserslist@4.28.8
Acredita-sepassing custom usage statistics via opts.stats causes standard popularity queries like '> 10%' to automatically evaluate against the provided custom statistics
Medidobrowserslist('> 10% in my stats') throws a BrowserslistError when opts.stats is omitted
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golangContrato da amostrago · linux/x64github.com/go-playground/validator/v10@v10.30.3
Acredita-seTagging a non-pointer struct field with validate:"required" causes validator.New().Struct() to reject an uninitialized zero-value struct.
Medidovalidator.New() ignores validate:"required" on non-pointer struct fields and returns nil for zero-value structs, while validator.WithRequiredStructEnabled() causes validation to fail with a required tag error on the struct field.
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pubContrato da amostradart · linux/x64shelf@1.4.2
Acredita-seA mounted sub-router configured with a custom notFoundHandler only handles its own 404s when no other parent routes match, allowing sibling or fallback routes in the parent Router to catch unhandled paths.
MedidoA parent Router falls through unmatched sub-paths to subsequent sibling routes when the mounted sub-router uses the default notFoundHandler, but halts and returns 404 when configured with a custom notFoundHandler.
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golangContrato da amostrago · linux/x64github.com/spf13/pflag@v1.0.10
Acredita-seEnabling ParseErrorsWhitelist.UnknownFlags allows unrecognized flags to pass through without error while preserving all subsequent positional arguments in FlagSet.Args().
MedidoWhen ParseErrorsWhitelist.UnknownFlags is true, FlagSet.Parse on unknown flags without an equals sign silently consumes the following non-flag argument as the flag value, leaving Args empty rather than preserving the positional argument.
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golangContrato da amostrago 1.26 · linux/x64google.golang.org/grpc@v1.83.0
Acredita-seA client can receive responses larger than 4MB without additional configuration because the default 4MB limit applies only to server request payloads, or by setting grpc.MaxCallSendMsgSize on the client.
MedidoWhen a gRPC server returns a 5MB payload to a client with default options, the server transmits it without error but the client fails to decode the response with status code ResourceExhausted because the default client-side receive limit is 4MB.
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pubContrato da amostradart · linux/x64shelf@1.4.2
Acredita-seA shelf Cascade cascades to subsequent handlers on any 4xx or 5xx client or server error response by default.
MedidoCascade defaults to cascading only on 404 and 405 status codes, requiring explicit statusCodes or shouldCascade configuration to cascade past 400 Bad Request, 401 Unauthorized, or 500 Internal Server Error responses.
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golangContrato da amostrago · linux/x64go.uber.org/zap@v1.27.0
Acredita-sezap.Config.Build automatically resolves unregistered URI schemes to file paths or creates default sink wrappers for custom protocol schemes
Medidozap.Config.Build fails with a 'no sink found for scheme' error when OutputPaths contains a URI scheme that has not been registered via zap.RegisterSink.
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golangContrato da amostrago 1.26 · linux/x64github.com/gin-gonic/gin@v1.12.0
Acredita-segin.Context implements context.Context so it automatically delegates Value, Deadline, and Done to the underlying http.Request context without extra configuration.
MedidoBy default gin.Engine has ContextWithFallback disabled, causing gin.Context to return nil for all http.Request context values and ignore request deadlines and cancellation.
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pypiContrato da amostrapython · linux/x64pillow@10.4.0
Acredita-seImage.open checks image size limits only during pixel rasterization and raises a generic MemoryError rather than DecompressionBombError when pixels exceed Image.MAX_IMAGE_PIXELS.
MedidoImage.open eagerly raises PIL.Image.DecompressionBombError during header parsing when total pixels exceed twice Image.MAX_IMAGE_PIXELS without allocating pixel memory.
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pypiContrato da amostrapython · linux/x64anyio@4.13.0
Acredita-seCancelling a task waiting on anyio.to_thread.run_sync cancels immediately without waiting for the synchronous thread, and setting abandon_on_cancel=True keeps worker thread concurrency strictly bounded by the CapacityLimiter.
MedidoWith abandon_on_cancel=False, cancelling the calling scope blocks until the worker thread finishes running, whereas abandon_on_cancel=True exits the scope immediately while releasing the CapacityLimiter before the synchronous thread finishes.
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hexContrato da amostraelixir · linux/x64decimal@3.1.1
Acredita-seSetting a Decimal context configuration applies across the application or automatically propagates to spawned child processes and tasks.
MedidoDecimal context is scoped to the calling process dictionary and is not inherited by spawned child tasks
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npmContrato da amostranode · linux/x64vue@3.5.41
Acredita-seIn production mode (NODE_ENV=production), an unhandled error thrown during Vue SSR component setup or rendering causes renderToString() to reject with the error.
MedidoIn production mode, unhandled errors in component setup or rendering are suppressed and logged to console by default, causing renderToString to resolve with partial markup unless app.config.throwUnhandledErrorInProduction is set to true.
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pypiContrato da amostrapython · linux/x64tenacity@9.1.4
Acredita-seretry_unless_exception_type retries functions that raise unexpected exceptions while allowing successful returns to exit immediately without retrying.
Medidoretry_unless_exception_type treats successful return values as retryable states, retrying until stop exhaustion and raising RetryError with a successful last_attempt Future.
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gemContrato da amostraruby · linux/x64minitest@6.0.6
Acredita-seCalling parallelize_me! inside a test class always enables parallel test execution across worker threads or raises an error if threads cannot be allocated
MedidoWhen MT_CPU is 1 or less at load time, Minitest.parallel_executor is nil, causing parallelize_me! to leave test class run_order as :random without including Minitest::Parallel::Test, running tests synchronously on the main thread
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npmContrato da amostranode · linux/x64jose@6.2.9
Acredita-seSetting maxTokenAge only limits allowable token age when an iat claim is present, falling back to exp expiration checking when iat is omitted.
MedidojwtVerify with maxTokenAge configured rejects tokens lacking an iat claim with JWTClaimValidationFailed and reason 'missing' rather than falling back to exp validation.
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npmContrato da amostranode · linux/x64rollup@4.34.8
Acredita-seA bare import with no specifiers, such as import './polyfill.js', is always retained during tree-shaking because it declares an intentional side effect with no unused bindings to eliminate.
MedidoSetting treeshake: { moduleSideEffects: false } causes Rollup to strip bare side-effect imports that have no consumed exports, whereas treeshake: { moduleSideEffects: 'no-external' } retains internal side-effect imports and strips unused external ones.
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golangContrato da amostrago · linux/x64github.com/google/go-cmp@v0.7.0
Acredita-sePassing multiple cmp.Transformer or cmp.Comparer options for the same underlying type automatically evaluates them in order or restricts them to their intended struct context.
Medidoassert cmp.Diff panics with ambiguous set of applicable options when multiple transformers or comparers target the same type without path filters
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pypiContrato da amostrapython · linux/x64pyarrow@25.0.1
Acredita-sepyarrow.csv.read_csv parses tokens defined in null_values as null values across all columns regardless of inferred column data type.
MedidoCSV columns inferred as strings preserve tokens matching null_values as literal strings unless strings_can_be_null is explicitly set to True, whereas numeric columns convert them to nulls by default.
Como conferir qualquer linha daqui
Abra a amostra, leia o contract dela e execute. O contract é o teste da própria amostra: roda sem rede em um contêiner fixado, e o recibo assinado dessa execução é o que a rede guarda. Nada aqui depende de como lemos uma biblioteca, apenas do que ela fez.
Algumas amostras publicadas não estão nesta página. O contrato delas passou e a amostra está no ar, mas nenhuma linha desse contrato se lê como uma frase. Uma asserção como expect(x).toBe(1), ao lado da crença que verifica, não diz nada a quem lê. Preferimos deixá-las de fora a publicar evidência que ninguém consegue ler.