# testing-strategy

> Claude/Codex skill by [@zakariaf](https://omgskills.com/library/zakariaf/index.md) · 61 stars · Updated 2026-09-23

Enforces test doctrine where shape follows code not the pyramid: pushes logic into Flutter-free packages tested with pure package:test and an injected Clock; asserts invariants with seeded fuzz tests against an independent oracle plus round-trip and rounding goldens; prefers bare-implements fakes over mocktail for code you own; tests the data layer against a real NativeDatabase.memory Drift engine, never a mocked DAO; drives Notifiers headlessly with ProviderContainer overrides; guards one end-to-end acceptance gate and a runtime invariant tripwire; floors coverage on unrecoverable-bug files not a global percentage; and fixes the coverage-lies-upward gap. Use when writing tests under test/ or integration\_test/, choosing unit vs widget vs integration, adding a fuzz or round-trip property, wiring a fake or ProviderContainer test, gating coverage, or triaging a flaky-suite failure.

Tags: agent-skills, ai-agents, best-practices, claude-code, codex, coding-agent, cursor, dart, dartlang, developer-tools, drift, flutter, flutter-architecture, github-copilot, go-router, llm, material-design, mvvm, riverpod, skills

## Install

```sh
git clone https://github.com/zakariaf/Flutter-Skills /tmp/Flutter-Skills && ln -s /tmp/Flutter-Skills/skills/testing-strategy ~/.claude/skills/testing-strategy
```

## From README

Testing Strategy Tests are the only correctness instrument you control at build time: shape the suite to the code, not to a decades-old ratio, and make each test assert behaviour a build either passes or fails. Applies to every test under test/ and integrationtest/. Read the reference for the task at hand: references/test-layers.md — per-layer harness, imports, teardown, edge tables (pure core, in-memory Drift, headless Notifier, integration). references/property-and-fakes.md — fakes-over-mocks, enum-driven fake state, seeded fuzz, independent oracles, absence-of-a-failure-class tests. references/coverage-and-budget.md — file-level floors, the coverage-lies-upward fix, the suite-time budget, and the manual-pass handoff. Run scripts/checktesthygiene.sh and scripts/runtests.sh before a PR. Golden, RTL, and a11y widget mechanics live in widget-golden-and-a11y-testing; this skill governs everything below the pixel. Non-negotiable rules Shape the suite to the code, not the pyramid.

## Links

- HTML page: https://omgskills.com/library/zakariaf/flutter-skills/skills/testing-strategy/
- GitHub: https://github.com/zakariaf/Flutter-Skills
- Author: [@zakariaf](https://omgskills.com/library/zakariaf/index.md)

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