Recent posts tagged testing

Coverage says 94%. Every test is green. You deploy on Friday afternoon, and by Monday a customer has found a bug in the exact function you "tested". When you open the test, the reason is obvious in hindsight. The test never ran your code. It ran a f...

This is the third post from my n8n intake classifier, a practice project for a fictional automation agency that I built with an AI collaborator. The first was about the classification prompthttps://coderlegion.com/31215/each-fix-to-my-classification-...

> Werbung / Disclosure: Prisma gave me a coupon for two months of a paid plan for free and said it will add free credits, so I could try Prisma Postgreshttps://www.prisma.io/postgres and Compute for this project. All results below come from my own ru...

Timing tests look wonderfully objective. Start a stopwatch, call the component, stop the watch, and compare the result with a budget. The number is precise. The experiment may not be. That distinction matters in continuous integration, where many t...

!Illustration of uncertainty in executionhttps://guetaquant.com/images/riesgo-ejecucion-mt5-2026.webp The smallest quoted point and the minimum price change used as a trading tick can differ. If a program divides an exit distance by SYMBOLPOINT but ...

There is a job in my CI called judge. It reads the monthly issue my content pipeline writes, scores it against a rubric with five criteria, and blocks the merge if anything comes back at 2 out of 5 or lower. An LLM grading an LLM, with a written poli...

Most of the bugs that taught me something weren't crashes. The system worked, the checks were green, and the property I cared about was still broken. Here are four of them, from three different projects. 1. The prompt-injection test that passed whil...

I put a fake AWS key in a file and asked Claude Code to read it twice in the same session: once with its Read tool, once with cat. An OWASP Guardian sat between the agent and its tools. With cat, the model got this: AWSACCESSKEYID=REDACTED With R...

Software often uses broad time windows for good reasons. A dashboard may need recent history, work that is actionable now, and the next scheduled item. Fetching all of that in one bounded query can be efficient and easy to reason about. The trouble ...

Most frontend teams I talk to have plenty of tests and still find out about broken screens from users. The unit tests are green, the refactor broke every one of them anyway, and nobody is sure the checkout flow works until someone clicks through it. ...

Installing a console and proving that visitor traffic is inspected are different tests. SafeLine can filter a request only after that request enters its reverse proxy. If the public name still points at the origin, or if you call the upstream address...

A console login only proves that the management service answered. It does not prove that public clients are being filtered. SafeLine is a self-hosted web application firewall placed in front of a web application so that it can filter and monitor HTTP...

Navigation bugs are often judged by their final state. Did the correct page appear? Did the authorization check pass? Did the URL settle on the expected address? Those questions matter, but they can miss the frame that users actually notice. In a r...

Disclosure: I work on upscaleimg.org. These are practical quality checks, not measured performance claims about the service. An enlarged image can look impressive in a small preview and still fail when placed on a product page. More pixels are not t...

Disclosure: I work on flux-3.org. This article describes an evaluation process and does not claim official model-vendor affiliation, benchmark results, or access to private model internals. When an image prompt changes in several places at once, com...

Disclosure: I work on whisk-ai.co, an independent image-remix website. This is not an announcement from Google or a claim of affiliation with its products. Reference-based image generation is easier to debug when each reference has a clear job. A pr...

Disclosure: I work on nanobanana-ai.org. The checklist below is a suggested evaluation method, not a published benchmark or a description of private model internals. Prompt edits are difficult to test because the expected output is not a single exac...

Disclosure: I work on Photo Tea. This is a proposed review workflow, not a claim that the product implements the code or automatically preserves every detail. An image edit has two requirements: make the requested change and leave unrelated content ...

Disclosure: I work on videobgremover.org. This is a suggested QA procedure, not a published segmentation benchmark or a description of our private processing implementation. A background-removal result can have a convincing still frame and distracti...

Disclosure: I work on nano-banana-3.org. This is a workflow recommendation, not an official model-vendor statement or a claim that the website exposes a dependency-tracking API. When a generated image changes unexpectedly, the prompt is not always t...