bdd-testing

Rules for behavior-driven development (BDD), a testing approach that describes software through user-visible behavior, using Gherkin scenarios and the bdd_widget_test package. They target Dart and Flutter interfaces.

In plain words
What is it for?
Use them to organize feature files and Given/When/Then steps, test Flutter interactions with WidgetTester, and check visible results in reusable scenarios.
Why use it?
They keep tests focused on what users see and do instead of internal implementation details. They also avoid real network calls by using mocked data sources.

Cursor rule for Cursor

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add rules/b-fontaine/devoxx-2026/bdd-testing
Clone the repo
git clone --depth 1 https://github.com/b-fontaine/devoxx-2026

Made for: Cursor.

Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 298 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00000 $0.00298
Opus 5 $0.00000 $0.00149
Sonnet 5 $0.00000 $0.00060
Haiku 4.5 $0.00000 $0.00030

Measured 2d ago against content hash eabec5cef44f, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

bdd-testing scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.cursor/rules/bdd-testing.mdc · 36 lines

What it actually says

Tests BDD — bdd_widget_test

Structure des fichiers .feature

Feature: Signalement d'anomalie
  En tant qu'utilisateur de l'application
  Je veux signaler une anomalie urbaine
  Afin que la municipalité puisse intervenir

  Scenario: Soumission réussie d'un signalement
    Given l'utilisateur est sur la page de signalement
    And le service de signalement est disponible
    When l'utilisateur remplit le formulaire avec des données valides
    And l'utilisateur soumet le signalement
    Then un message de confirmation est affiché
    And le signalement apparaît dans la liste

Conventions

  • Un fichier .feature par fonctionnalité utilisateur
  • Les steps Given/When/Then décrivent des comportements, pas des implémentations
  • Les steps sont réutilisables entre scénarios
  • Nommer les fichiers : snake_case matching le nom de la feature

Implémentation des steps

  • Chaque step mappe vers une fonction Dart annotée
  • Utiliser le WidgetTester pour les interactions UI
  • Mocker les repositories dans les Given (jamais d'appel réseau réel)
  • Les Then vérifient des widgets visibles, pas des états internes
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 36 lines · 0 tokens per session scan A eabec5cef44f

Subscribe to this mod's changes

bdd-testing is a cursor rule published in the GitHub repository b-fontaine/devoxx-2026 (5 stars, last pushed 4mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 298 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.