Security Testing
Dynamic Application Security Testing (DAST) probes your running application for vulnerabilities — sending real HTTP requests and observing how the server responds. OWASP ZAP and Burp Suite are the two most widely used tools. This guide covers what each finds, how to automate scans in CI, and how to interpret the
Testing
AI agents call external APIs — search engines, databases, Slack, GitHub, payment processors. Mocking these in tests is essential: real APIs are slow, rate-limited, non-deterministic, and sometimes irreversible. This guide covers four mocking strategies for agentic systems: HTTP interception, tool-level mocking, record/replay, and in-process fakes. An AI agent that manages
Testing
Golden master testing (also called characterization testing) captures what your code currently does and stores it as a baseline. You then refactor with confidence — if the output changes, the test fails. It's not about proving your code is correct; it's about proving a refactor didn'
Testing
iText 7 is the most widely used Java PDF generation library. Testing iText-generated PDFs requires writing to an in-memory stream, parsing the output with iText's PdfReader, and asserting on text content, layout, fonts, and structure. This guide covers JUnit 5 patterns for all of these. Key Takeaways Write
Testing
AI agent workflows are harder to test than traditional software because the intermediate steps (which tools get called, in what order, with what arguments) are non-deterministic. This guide covers deterministic testing strategies: behavioral assertions over tool calls, golden dataset testing, state-based verification, and contract testing for agent-tool interfaces. AI agents
Testing
WebXR applications are notoriously hard to test because they require browser APIs that only activate with real hardware. This guide shows how to use Playwright's WebXR emulation to test immersive sessions, controller input, hit testing, and XRSession lifecycle — all in CI without a headset. WebXR brings immersive experiences
Testing
Unity XR projects often go untested until a physical headset is involved, but that's unnecessary and slow. This guide covers Unity Test Framework, XR Simulation, controller input mocking, and Play Mode tests for XR rigs — everything you need to validate VR and AR behavior automatically. Testing immersive applications
Testing
OpenXR's promise is write-once, run-anywhere VR — but runtimes differ in subtle ways that break apps silently. This guide covers the OpenXR Conformance Test Suite, mock runtime testing, action binding validation, cross-platform extension testing, and automated frame timing checks to catch runtime-specific regressions before users do. OpenXR standardized the
Testing
Dialogflow CX agents require testing at three levels: the built-in Test Cases console feature for conversation regression, Python client library for automated route and parameter testing, and Flask test client for webhook validation. This guide covers all three with production-ready examples. Dialogflow CX introduced a significantly more structured approach to
Testing
Alexa Skill testing requires a layered approach: unit tests for individual intent handlers, integration tests for full request/response cycles, and end-to-end simulation with Bespoken. This guide covers all three layers with concrete examples in Node.js and Python. Building a reliable Alexa Skill is only half the battle. Without
Testing
Voice UI quality requires testing across five dimensions: NLU intent recognition accuracy (precision/recall/F1), multi-turn dialog flow completeness, slot filling edge cases and error recovery, accessibility compliance for voice, and cross-platform consistency across Alexa, Google, and Siri. This guide defines the test matrix and KPIs for each dimension. Voice
Testing
visionOS introduces entirely new UI paradigms — volumetric windows, immersive spaces, eye tracking, and spatial audio — that existing iOS testing patterns don't cover. This guide walks through XCTest for visionOS, RealityKit entity hierarchy testing, SwiftUI volume and immersive space testing, eye tracking simulation in Simulator, and render budget verification.