ネットワークが見つけたもの
以下の各行は意見ではなく測定です。いずれも公開サンプルにリンクしており、その contract はネットワークを切った固定コンテナで実行されるので、自分で再実行して結果に反論できます。
OS とランタイムはリンク先サンプルに記録された環境です。その項目がない記録は選択時に除外されます。
597 件の発見、8 個のエコシステム。
- cargo
- composer
- gem
- golang
- hex
- npm
- pub
- pypi
サンプルが述べ、その契約が測ったこと
公開サンプルが測定した結果の 126–150 件目(全 568 件)。
-
pubサンプル契約dart · linux/x64json_annotation@4.9.0
信じられていることA 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.
測定結果JsonSerializable.fromJson enforces snake_case option keys and disallowUnrecognizedKeys, throwing a CheckedFromJsonException with badKey true on camelCase Dart property names
-
golangサンプル契約go · linux/x64github.com/goccy/go-yaml@v1.19.2
信じられていることyaml.Unmarshal silently accepts duplicate mapping keys and overwrites earlier occurrences with later ones.
測定結果assert yaml.Unmarshal rejects duplicate mapping keys with a SyntaxError by default, leaving destination values empty
-
pypiサンプル契約python · linux/x64cffi@2.0.0
信じられていることCalling 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.
測定結果Calling 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.
-
pubサンプル契約dart · linux/x64http@1.6.0
信じられていることTop-level HTTP convenience functions executed inside runWithClient reuse a shared ambient client instance without closing it after each request.
測定結果Top-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.
-
npmサンプル契約node · linux/x64typescript@5.9.3
信じられていることTypeScript automatically elides type-only named imports and unused value imports during ECMAScript emit regardless of whether type keywords or verbatimModuleSyntax are configured.
測定結果When 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.
-
npmサンプル契約node · linux/x64vitest@3.2.7
信じられていることmergeConfig replaces array options like test.include and test.reporters with override values and supports function config factories.
測定結果mergeConfig concatenates array options like test.include, test.exclude, and test.reporters rather than replacing them, appending override test filters to base patterns.
-
pubサンプル契約dart · linux/x64convert@3.1.2
信じられていることCodePage.encode and CodePage.decode silently replace unmapped characters or undefined bytes with fallback tokens rather than throwing FormatException.
測定結果CodePage.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.
-
npmサンプル契約node · linux/x64browserslist@4.28.8
信じられていることpassing custom usage statistics via opts.stats causes standard popularity queries like '> 10%' to automatically evaluate against the provided custom statistics
測定結果browserslist('> 10% in my stats') throws a BrowserslistError when opts.stats is omitted
-
golangサンプル契約go · linux/x64github.com/go-playground/validator/v10@v10.30.3
信じられていることTagging a non-pointer struct field with validate:"required" causes validator.New().Struct() to reject an uninitialized zero-value struct.
測定結果validator.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.
-
pubサンプル契約dart · linux/x64shelf@1.4.2
信じられていることA 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.
測定結果A 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.
-
golangサンプル契約go · linux/x64github.com/spf13/pflag@v1.0.10
信じられていることEnabling ParseErrorsWhitelist.UnknownFlags allows unrecognized flags to pass through without error while preserving all subsequent positional arguments in FlagSet.Args().
測定結果When 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.
-
golangサンプル契約go 1.26 · linux/x64google.golang.org/grpc@v1.83.0
信じられていることA 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.
測定結果When 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.
-
pubサンプル契約dart · linux/x64shelf@1.4.2
信じられていることA shelf Cascade cascades to subsequent handlers on any 4xx or 5xx client or server error response by default.
測定結果Cascade 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.
-
golangサンプル契約go · linux/x64go.uber.org/zap@v1.27.0
信じられていることzap.Config.Build automatically resolves unregistered URI schemes to file paths or creates default sink wrappers for custom protocol schemes
測定結果zap.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.
-
golangサンプル契約go 1.26 · linux/x64github.com/gin-gonic/gin@v1.12.0
信じられていることgin.Context implements context.Context so it automatically delegates Value, Deadline, and Done to the underlying http.Request context without extra configuration.
測定結果By default gin.Engine has ContextWithFallback disabled, causing gin.Context to return nil for all http.Request context values and ignore request deadlines and cancellation.
-
pypiサンプル契約python · linux/x64pillow@10.4.0
信じられていることImage.open checks image size limits only during pixel rasterization and raises a generic MemoryError rather than DecompressionBombError when pixels exceed Image.MAX_IMAGE_PIXELS.
測定結果Image.open eagerly raises PIL.Image.DecompressionBombError during header parsing when total pixels exceed twice Image.MAX_IMAGE_PIXELS without allocating pixel memory.
-
pypiサンプル契約python · linux/x64anyio@4.13.0
信じられていることCancelling 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.
測定結果With 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.
-
hexサンプル契約elixir · linux/x64decimal@3.1.1
信じられていることSetting a Decimal context configuration applies across the application or automatically propagates to spawned child processes and tasks.
測定結果Decimal context is scoped to the calling process dictionary and is not inherited by spawned child tasks
-
npmサンプル契約node · linux/x64vue@3.5.41
信じられていることIn production mode (NODE_ENV=production), an unhandled error thrown during Vue SSR component setup or rendering causes renderToString() to reject with the error.
測定結果In 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.
-
pypiサンプル契約python · linux/x64tenacity@9.1.4
信じられていることretry_unless_exception_type retries functions that raise unexpected exceptions while allowing successful returns to exit immediately without retrying.
測定結果retry_unless_exception_type treats successful return values as retryable states, retrying until stop exhaustion and raising RetryError with a successful last_attempt Future.
-
gemサンプル契約ruby · linux/x64minitest@6.0.6
信じられていることCalling parallelize_me! inside a test class always enables parallel test execution across worker threads or raises an error if threads cannot be allocated
測定結果When 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
-
npmサンプル契約node · linux/x64jose@6.2.9
信じられていることSetting maxTokenAge only limits allowable token age when an iat claim is present, falling back to exp expiration checking when iat is omitted.
測定結果jwtVerify with maxTokenAge configured rejects tokens lacking an iat claim with JWTClaimValidationFailed and reason 'missing' rather than falling back to exp validation.
-
npmサンプル契約node · linux/x64rollup@4.34.8
信じられていることA 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.
測定結果Setting 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.
-
golangサンプル契約go · linux/x64github.com/google/go-cmp@v0.7.0
信じられていることPassing 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.
測定結果assert cmp.Diff panics with ambiguous set of applicable options when multiple transformers or comparers target the same type without path filters
-
pypiサンプル契約python · linux/x64pyarrow@25.0.1
信じられていることpyarrow.csv.read_csv parses tokens defined in null_values as null values across all columns regardless of inferred column data type.
測定結果CSV 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.
ここの行を確かめる方法
サンプルを開き、contract を読み、実行してください。contract はそのサンプル自身のテストです。ネットワークを切った固定コンテナで実行され、その実行の署名済みレシートがネットワークに保存されます。ここに書かれていることはライブラリについての解釈ではなく、ライブラリが実際に行ったことだけに基づいています。
公開済みのサンプルのうち、このページにないものがあります。契約は通過しておりサンプルも生きていますが、その契約に文として読める行がないからです。expect(x).toBe(1) のような断言は、検査している思い込みの隣に置いても読者に何も伝えません。読めない証拠を載せるより、空けておくことを選びました。