Testing
SimpleWebAuthn is the most widely used open-source WebAuthn library for JavaScript servers. Its @simplewebauthn/server package handles the complex cryptographic operations for credential registration and authentication verification, so you don't have to implement CBOR parsing, COSE key validation, or attestation verification yourself. But even with a battle-
Testing
Passkeys are the consumer-friendly implementation of FIDO2/WebAuthn, introduced by Apple, Google, and Microsoft as a coordinated standard for passwordless authentication. Unlike hardware security keys, passkeys sync across devices via iCloud Keychain, Google Password Manager, and Microsoft's ecosystem — which introduces testing challenges around cross-device scenarios, OS-
Testing
FIDO2 is the authentication standard that powers WebAuthn and passkeys. It encompasses two layers: WebAuthn (the browser API) and CTAP2 (the Client-to-Authenticator Protocol). Testing FIDO2 authenticators — hardware security keys like YubiKey, software authenticators, and platform authenticators — requires strategies for both the protocol layer and the application layer. This
Testing
Biometric authentication — Touch ID, Face ID, Windows Hello, fingerprint readers — powers the most seamless login experiences on the web and in mobile apps. It also creates one of the hardest testing challenges: you can't script a fingerprint or a face scan. But biometric auth sits on top of
Testing
Unleash is an open-source feature management platform used by thousands of teams to control feature rollouts without code deploys. But the flexibility that makes Unleash powerful — custom activation strategies, gradual rollouts, user segmentation — also makes testing more complex. This guide covers every layer of Unleash testing from SDK mocks
Testing
Split.io combines feature flags, experimentation, and observability in a single platform. Its treatment-based model — where flags return named treatments like "on", "off", or custom variant names — requires test strategies that go beyond simple boolean checks. This guide covers Split.io-specific testing patterns from
Testing
OpenFeature is a CNCF specification that standardizes how applications interact with feature flag systems. Instead of coupling your code to LaunchDarkly, Unleash, or Flagsmith APIs, you code against the OpenFeature API — and swap providers without changing application code. But this abstraction layer introduces new testing requirements. You must test the
Testing
Feature flags without proper testing are a reliability risk. LaunchDarkly lets you ship code faster, but if your flag logic, targeting rules, or SDK integrations aren't validated, a bad flag evaluation can silently break production for a subset of users. This guide covers proven strategies for testing LaunchDarkly
Testing
Flagsmith is an open-source feature flag and remote configuration platform supporting both cloud and self-hosted deployments. Testing Flagsmith integrations well means covering the SDK initialization, flag evaluation, identity trait propagation, and remote config retrieval — at every layer of your test pyramid. This guide walks through concrete patterns for
Testing
Every system call a container makes is an attack surface. seccomp (Secure Computing Mode) lets you define exactly which syscalls a container is allowed to make — and kill or log anything outside that list. The challenge is writing profiles that are tight enough to restrict attacker behavior but permissive enough
Testing
Pod Security Standards (PSS) replaced PodSecurityPolicy (PSP) in Kubernetes 1.25. They define three security levels for pods — Privileged, Baseline, and Restricted — and the Pod Security Admission (PSA) controller enforces them at the namespace level. But "enforces" only works if you actually test that your manifests comply. This
Testing
Runtime security is the last line of defense. If a container escapes, an attacker pivots laterally, or malware executes inside your cluster — Falco is what catches it. But Falco rules that go untested are rules that fail silently when it matters most. This guide covers how to write, validate, and