enhancement

[edouardmisset]

Depends on: #22

What to build

Define a fixture factory interface and implement deterministic Small/Medium/Large fixtures for each workspace (array, date, function, math, object, text). Each workspace exposes a fixtures.ts module with a factory that generates consistent test data for benchmarking.

Acceptance criteria

• Fixture factory interface defined: interface FixtureFactory { small(): unknown, medium(): unknown, large(): unknown }
• array/fixtures.ts implements factory (returns arrays of varying size)
• date/fixtures.ts implements factory (returns date objects/arrays)
• function/fixtures.ts implements factory (returns functions/callbacks)
• math/fixtures.ts implements factory (returns number arrays)
• object/fixtures.ts implements factory (returns plain objects)
• text/fixtures.ts implements factory (returns strings)
• type/fixtures.ts implements factory (or marked as N/A for type-only workspace)
• Factories are deterministic (same size always produces same shape/values)

Out of scope

• Using fixtures in actual benchmarks
• Auto-generation