Good Enough Testing - All updates · Good Enough Testing

2025-12-04

LLMs

prompting

A short review of study "How Many Instructions can LLMs Follow at Once?"

Recent research on instruction density shows that large language models struggle as the number of rules increases. Even top reasoning models maintain strong performance only up to about 150 instructions before accuracy begins to decline. They also follow earlier instructions more reliably than later ones, creating a strong primacy effect under moderate cognitive load.

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Lucian Ghinda

Ruby Developer

2025-11-07

test oracle

test generation

Highlights from "Do LLMs Generate Test Oracles That Capture The Actual Or The Expected Program Behaviour?"

Highlights from the paper "Do LLMs Generate Test Oracles That Capture The Actual Or The Expected Program Behaviour?". Explore how LLMs generate test cases, the challenges with test oracles, and practical ways to use AI for better software testing.

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Lucian Ghinda

Ruby Developer

2025-11-04

LLMs

testing

Use LLMs to generate either tests or code, but not both

A practical look at why it’s safer to let LLMs generate either code or tests, not both. Explains the risks of confirmation bias and how good specifications help produce more useful, trustworthy test cases.

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Lucian Ghinda

Ruby Developer

2025-10-27

testing

developers

Shortly about tests generated by LLMs

LLMs can generate thousands of tests, but quantity doesn’t mean quality. Fewer, well-designed tests are more valuable than many AI-generated ones. Keep only tests that matter.

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Lucian Ghinda

Ruby Developer

2025-10-25

database

comments

Add comments to your database for humans and LLMs

Adding comments to your Rails tables and columns is not just documentation. It’s context for future developers and for LLMs that will read your schema to help you write code, generate tests, or explain product rules. Each small note you add today reduces confusion tomorrow.

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Lucian Ghinda

Ruby Developer

2025-10-21

tests

LLMs

Tests as the line of defense for AI generated code

Good tests keep AI-generated code in check. Make sure your tests are fullfilling their purpose to guard from bugs and keep quality.

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Lucian Ghinda

Ruby Developer

2025-10-13

testing

developers

Resources to use when you want to test strings

A collection of resources to use when you want to test strings.

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Lucian Ghinda

Ruby Developer

2025-10-08

sampling

test data

Good Tests Begin with Good Samples

Learn how applying statistical sampling principles helps developers design smarter test data for better software testing coverage. Good testing starts with good samples apply sampling ideas to build reliable, risk-focused test data.

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Lucian Ghinda

Ruby Developer

2025-10-06

tests

developers

The Art of Knowing Which TDD Tests to Delete

Not all tests written during TDD should live in your codebase. This article explains how to identify which tests add long-term value (like verifying requirements, documenting behavior, and supporting maintainability) and which ones are just scaffolding or noise.

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Lucian Ghinda

Ruby Developer

2025-10-02

testing

developers

What We Lost When QA Teams Disappeared

Over the past 15 years, QA teams have largely vanished. Developers test their own code, but without test design, coverage metrics can be misleading. This article explores the hidden gaps in developer testing and how learning test design can close them.

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Lucian Ghinda

Ruby Developer

2025-09-29

testing

developers

The smallest files of any type to be used in automated testing

A collection of the smallest valid files of any type to be used in automated testing.

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Lucian Ghinda

Ruby Developer

2025-08-21

AI

LLM

New AI Workshop at EuRuKo 2025

Learn why AI can’t independently write effective tests and how to stay in control. Discover the new workshop about prompting techniques to reduce hallucinations and ensure your tests verify real requirements

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Lucian Ghinda

Ruby Developer

2025-06-24

testing

developers

How many tests are enough for this piece of code?

How would you test a simple logic like `if A || B`? Let’s explore the number of test cases generated by coverage criteria like branch coverage, condition coverage, MC/DC, and truth tables

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Lucian Ghinda

Ruby Developer

2024-11-20

tests

writing

Tests should be simple

Tests should be simple, avoid complexity and keep them readable. They should flow like a recipe, not a complex machine.

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Lucian Ghinda

Ruby Developer

2024-11-19

workshop

sessions

Two new sessions for December 2024

Two new sessions launched for December 2024

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Lucian Ghinda

Ruby Developer

2024-10-24

TDD

testing

What is the difference between TDD and the testing process?

Test Driven Development is a development methodology that uses tests to drive the development, while testing activity means to purposefully write tests to verify the correctness of the code, to document the expected behavior of the code, and to improve maintainability.

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Lucian Ghinda

Ruby Developer

2024-10-24

testing

developers

How to think about testing as a developer

Testing has a lot of definitions and I want to share my own definition of testing for developers and how I see it usefulness.

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Lucian Ghinda

Ruby Developer

2024-10-24

Session scheduled for 1st November is fully booked.

The session scheduled for 1st November is now fully booked. I just opened registration for the next session on 22nd November. Register until 31st October to get 20% discount.

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Lucian Ghinda

Ruby Developer

2024-10-23

about

intro

A short video introduction

I made a short video to introduce the workshop and explain what questions I am going to help you answer.

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Lucian Ghinda

Ruby Developer

2024-09-24

history

terms

What is good enough testing?

What is good enough testing? Exploring my own definition along with James Bach's original paper from 1998.

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Lucian Ghinda

Ruby Developer

2024-09-22

launch

workshops

Announcing the Good Enough Workshops

Launching the website and planning the next workshops.

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Lucian Ghinda

Ruby Developer

Workshops

Video Courses

Booklet

Testimonials

Learn

Workshops

Video Courses

Booklet

Testimonials

For Businesses

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From the blog

A short review of study "How Many Instructions can LLMs Follow at Once?"

Highlights from "Do LLMs Generate Test Oracles That Capture The Actual Or The Expected Program Behaviour?"

Use LLMs to generate either tests or code, but not both

Shortly about tests generated by LLMs

Add comments to your database for humans and LLMs

Tests as the line of defense for AI generated code

Resources to use when you want to test strings

Good Tests Begin with Good Samples

The Art of Knowing Which TDD Tests to Delete

What We Lost When QA Teams Disappeared

The smallest files of any type to be used in automated testing

New AI Workshop at EuRuKo 2025

How many tests are enough for this piece of code?

Tests should be simple

Two new sessions for December 2024

What is the difference between TDD and the testing process?

How to think about testing as a developer

Session scheduled for 1st November is fully booked.

A short video introduction

What is good enough testing?

Announcing the Good Enough Workshops