Fixtures & Templates

Two complementary ways to load realistic starting points from the header bar:

Templates

Templates insert curated patterns (and associated flags / sample text where defined) for common tasks: validation, parsing, etc. Selecting a template focuses the pattern editor so you can iterate quickly.

Fixtures

Fixtures load fixture suites: bundled regex + multi-line test cases (and categories such as performance/safety demos). Choosing a suite fills the pattern and tests; the fixture panel above the test editor lets you jump between cases while keeping context.

Performance / safety suites

Some suites are designed to illustrate catastrophic backtracking or expensive behavior. The app may apply stricter timeouts for matching when those suites are active so the UI stays responsive—watch the Warnings tab for related guidance.