CoreStory + GitHub Copilot Automated Test Generation Playbook

Automatically Boost Your Test Coverage with CoreStory + Copilot

Generate comprehensive, production-ready tests directly in VS Code (or your IDE of choice). This playbook pairs CoreStory’s code intelligence with GitHub Copilot (Chat, custom instructions, and optional Agent mode) so you analyze real behavior, create high-quality unit/integration/E2E tests, and iterate inline—without leaving the editor.

What you’ll get

• A role-based guide, prompt library, decision tree, edge-case catalog, and coverage strategy—built to go from “hello world” to production-ready suites.
• Concrete outcomes to target: ~10–15 tests in minutes, 50+ cases in ~10 minutes, 90%+ acceptance-criteria alignment, and 50–60% less QA time on covered areas.

Why this matters

CoreStory extracts actual business rules, flows, and edge cases from your codebase; Copilot turns that understanding into runnable tests. By cross-checking “what should happen” (specs) with “what actually exists” (implementation), you surface spec drift, undocumented behavior, and risky integrations before they ship.

How it works (in practice)

1. Analyze before you generate — Always query CoreStory for structure, dependencies, and rules; never ask Copilot to write tests blind.
2. Iterate in small rounds — Happy paths → edge cases → error scenarios → integration/E2E; commit value incrementally.
3. Hold tests to a standard — Descriptive names, AAA structure, precise assertions, realistic data, and explicit edge-case coverage.
4. Plan coverage with ROI — Use the test pyramid and risk tiers to keep suites fast, stable, and cost-effective.

Fast start (5 minutes)

• Configure CoreStory MCP in VS Code.
• Open Copilot Chat and paste a Prompt Template with your CoreStory project ID.
• Generate, run, and refine tests inline (Agent mode unlocks autonomous setup + execution).

Who it’s for

• QA leaders aiming for requirement-level coverage.
• Developers practicing TDD or securing refactors with characterization tests.
• Test/Platform teams standardizing API, contract, and E2E suites across services.

What’s inside the playbook

• Main Guide (end-to-end workflow + troubleshooting)
• Prompt Templates (role/test-type/framework)
• Test Type Decision Tree (fast selection)
• Edge-Case Catalog (12 categories)
• Coverage Strategy Framework (targets by stack + stage)
• Quick Reference (cheat-sheet for patterns and assertions)

Results to expect

Teams report faster suite creation, stronger alignment to acceptance criteria, and earlier discovery of implementation-specific edge cases—thanks to cross-checks between CoreStory and source code embedded in the Copilot flow. Start small, measure coverage and defect catch rates, then scale to critical paths.