Testably

Mock the unmockable.

IFileSystem, ITimeSystem and IRandomSystem abstractions with feature-complete in-memory mocks for deterministic, cross-platform unit tests.

Fluent expectations for .NET.

A modern, async-first assertion library with a natural-language API. Plays well with xUnit, NUnit, MSTest and TUnit.

AOT-friendly mocking via source generators.

Strongly-typed, source-generator-based mocking for .NET. No runtime proxies, no reflection, native-AOT compatible.

Looking for add-ons? See the Extensions section.