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Lo que dice la muestra y mide su contrato
351–375 de 568, medidos por muestras publicadas.
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npmContrato de muestranode · linux/x64marked@17.0.3
Se creeMarkdown image alt text containing double quotes is rendered with HTML entity escaping so the attribute value does not break out of quotes.
Medidomarked.parse escapes double quotes inside image alt text as " rather than emitting raw unescaped double quotes inside alt attributes
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npmContrato de muestranode · linux/x64luxon@3.7.2
Se creeConfiguring Settings.defaultZone causes DateTime zone specifiers and setZone calls specifying 'system' to resolve to that configured default zone.
MedidoWhen Settings.defaultZone is overridden, Info.normalizeZone('system') and DateTime.fromISO(str, { zone: 'system' }) resolve to the host environment's SystemZone rather than Settings.defaultZone, while 'default' resolves to Settings.defaultZone instead of creating an invalid DateTime.
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npmContrato de muestranode · linux/x64luxon@3.5.0
Se creeSetting Settings.defaultZone overrides the zone for DateTime instances created or converted with the system zone specifier.
MedidoDateTime setZone('system') returns a SystemZone instance with type system rather than inheriting Settings.defaultZone.
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npmContrato de muestranode · linux/x64luxon@3.6.1
Se creeLooking up an invalid IANA timezone string such as 'constructor' in Luxon returns an invalid IANAZone object rather than the native Object constructor function.
MedidoIANAZone.create('constructor') returns an invalid IANAZone instance with isValid equal to false rather than returning the native Object constructor function.
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npmContrato de muestranode · linux/x64luxon@3.5.0
Se creeWhen throwOnInvalid is enabled, Luxon throws public custom error classes whose name property matches their constructor name.
MedidoLuxon's custom error classes (InvalidDateTimeError, InvalidDurationError, and InvalidIntervalError) are not exported, and their thrown instances have their name property set to 'Error' rather than their constructor names.
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npmContrato de muestranode · linux/x64luxon@3.7.2
Se creeDateTime.fromObject parses timezone configuration specified directly inside the date/time units object.
MedidoDateTime.fromObject throws an Error containing 'Invalid unit zone' if the 'zone' property is passed in the first argument object instead of the second options argument.
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npmContrato de muestranode · linux/x64jest@30.4.2
Se creeexpect(received).toEqual(expected) and expect(received).toStrictEqual(expected) inspect all own properties on an object, failing when non-enumerable properties or non-enumerable symbols contain conflicting values.
Medidoexpect(received).toEqual(expected) and expect(received).toStrictEqual(expected) pass when two objects differ only in non-enumerable properties or non-enumerable symbols because Jest 30 excludes non-enumerable properties from object matchers by default.
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npmContrato de muestranode · linux/x64jest@30.4.2
Se creePassing an empty array to test.each() safely runs zero tests, mirroring how JavaScript iteration handles empty arrays.
MedidoCalling test.each([]) throws a fatal error that crashes the test suite, rather than gracefully skipping and running zero tests.
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npmContrato de muestranode · linux/x64jest@30.4.2
Se creeA developer might expect that resetting Jest's module cache with jest.resetModules() is sufficient to restore the original implementation of a mocked dependency when the parent module is re-required.
Medidojest.resetModules() alone fails to restore the original implementation of a mocked dependency because Jest retains the mock definition in its registry.
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npmContrato de muestranode · linux/x64jest@29.7.0
Se creebeforeEach and afterEach hooks run for every test block defined in the file, including concurrent tests.
Medidotest.concurrent bypasses beforeEach and afterEach hooks, executing concurrent tests without running the setup and teardown hooks.
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npmContrato de muestranode · linux/x64jest@29.7.0
Se creeJest's expect(a).toEqual(b) and expect(a).toStrictEqual(b) perform deep property equality on Error instances and fail when custom error properties differ.
Medidoexpect(errA).toEqual(errB) passes when errA and errB are Error instances with identical messages but different custom properties like code or statusCode.
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npmContrato de muestranode · linux/x64jest@30.4.2
Se creejest.isolateModules isolates module mocking performed with jest.doMock within its callback scope, so subsequent module require calls outside the callback return the unmocked original module.
MedidoCalling jest.doMock inside a jest.isolateModules callback mutates Jest's global mock registry, causing subsequent require calls outside the callback to receive the mock instead of the original module.
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npmContrato de muestranode · linux/x64jest@29.7.0
Se creeJest automatically clears mock function call history between tests by default.
MedidoMock function call history is not cleared between tests by default, so a mock function called in a previous test retains its calls in subsequent tests unless clearMocks is explicitly enabled.
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npmContrato de muestranode · linux/x64jest@29.7.0
Se creeCalling jest.spyOn on a getter property without an accessType argument raises a TypeError for non-function properties, or following its error message to use jest.replaceProperty successfully mocks the property value.
Medidojest.spyOn on a getter property without accessType throws a base Error rather than a TypeError and suggests using jest.replaceProperty, which then throws another base Error stating it cannot replace getter properties and recommending jest.spyOn(object, property, 'get').
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npmContrato de muestranode · linux/x64jest@29.7.0
Se creeA test setup file configured under setupFiles has access to test framework globals like beforeEach, afterEach, and expect.extend.
Medidoassert running Jest with test framework hooks in setupFiles fails with ReferenceError: beforeEach is not defined because the framework environment is not yet initialized
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npmContrato de muestranode · linux/x64jest@30.4.2
Se creeCalling jest.resetAllMocks() restores functions spied on with jest.spyOn() back to their original unmocked implementation.
Medidojest.resetAllMocks() clears mock call history and resets the mock implementation to return undefined rather than restoring the original unmocked method, which only jest.restoreAllMocks() or spy.mockRestore() performs.
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npmContrato de muestranode · linux/x64jest@30.4.2
Se creeA named ESM import from such a CommonJS module should always resolve to the corresponding own-property function export.
MedidoJest 30.4.2 keeps named imports working for a CommonJS module where `module.exports` is a function with own-property exports.
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npmContrato de muestranode · linux/x64happy-dom@20.11.2
Se creeHappy DOM writes console output directly to the host console, and filtering virtual console output leaves unmatched entries queued for a later read.
MedidoA default Window buffers log, warn, and error calls as exact structured entries with type, level, message, and null group metadata
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npmContrato de muestranode · linux/x64happy-dom@20.11.2
Se creeThe CSS attribute selector [attr~="val"] treats hyphens as word boundaries and matches substrings in hyphenated attribute values.
Medidochild.matches('[data-controller~="modal"]') returns false against data-controller="modal-auto-close" rather than true, because [attr~="val"] matches only whitespace-separated tokens per CSS Selectors Level 4
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npmContrato de muestranode · linux/x64express@4.18.2
Se creeAll registered synchronous handlers on a single route will execute in sequence regardless of the stack size exceeding 100 handlers.
MedidoExpress 4.18.2 executes all 105 synchronous handlers registered on a single route, whereas Express 4.18.1 skips the 101st handler due to an off-by-one error during sync stack threshold reset.
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npmContrato de muestranode · linux/x64express@5.2.1
Se creereq.is('json') evaluates the Content-Type header directly regardless of whether a body was sent, req.range() returns empty arrays or null on invalid or unsatisfiable byte ranges, and req.accepts() returns true for any media type mentioned in the Accept header.
Medidoreq.is('json') returns null when the request lacks body headers such as Content-Length or Transfer-Encoding even if Content-Type application/json is present, returning the matched type string only when a body is actually transmitted
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npmContrato de muestranode · linux/x64express@4.22.2
Se creeExpress executes middlewares and route handlers in strict sequential order, preventing subsequent routes from running until preceding async middlewares complete and call next().
MedidoA downstream route handler is executed before a preceding async middleware completes if an earlier middleware calls next() twice.
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npmContrato de muestranode · linux/x64es-toolkit@1.50.0
Se creePassing { leading: true, trailing: false } to debounce executes immediately on the first call and prevents delayed execution on the trailing edge.
MedidoPassing { leading: true, trailing: false } to es-toolkit debounce fails to invoke immediately because edges defaults to ['trailing'] unless configured as { edges: ['leading'] }, while trailing execution still fires on timeout.
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npmContrato de muestranode · linux/x64express@4.21.2
Se creeExpress identifies error-handling middleware by checking if the first argument is an error or omitting the unused next parameter like (err, req, res) still catches errors passed to next(err).
MedidoExpress skips 3-parameter error handlers (err, req, res) during error routing because it identifies error middleware solely by checking fn.length === 4, executing only 4-parameter functions (err, req, res, next) while running 3-parameter functions on normal requests with shifted arguments
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npmContrato de muestranode · linux/x64core-js@3.50.0
Se creeA core-js-provided URL.prototype.toJSON dynamically calls the current URL.prototype.toString, so reassigning toString later also changes toJSON output.
MedidoWhen the host URL.prototype.toJSON is absent, importing core-js/actual/url installs the method while retaining a compliant native URL constructor.
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.