nautilus-testkit 0.55.0

Testing utilities for the Nautilus trading engine
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# nautilus-testkit

[![build](https://github.com/nautechsystems/nautilus_trader/actions/workflows/build.yml/badge.svg?branch=master)](https://github.com/nautechsystems/nautilus_trader/actions/workflows/build.yml)
[![Documentation](https://img.shields.io/docsrs/nautilus-testkit)](https://docs.rs/nautilus-testkit/latest/nautilus-testkit/)
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![license](https://img.shields.io/github/license/nautechsystems/nautilus_trader?color=blue)
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Test utilities and data management for [NautilusTrader](https://nautilustrader.io).

The `nautilus-testkit` crate provides testing utilities including test data management,
file handling, and common testing patterns. This crate supports testing workflows
across the entire NautilusTrader ecosystem with automated data downloads and validation:

- **Test data management**: Automated downloading and caching of test datasets.
- **File utilities**: File integrity verification with SHA-256 checksums.
- **Path resolution**: Platform-agnostic test data path management.
- **Precision handling**: Support for both 64-bit and 128-bit precision test data.
- **Common patterns**: Reusable test utilities and helper functions.

## NautilusTrader

[NautilusTrader](https://nautilustrader.io) is an open-source, production-grade, Rust-native
engine for multi-asset, multi-venue trading systems.

The system spans research, deterministic simulation, and live execution within a single
event-driven architecture, providing research-to-live semantic parity.

## Feature flags

This crate provides feature flags to control source code inclusion during compilation:

- `python`: Enables Python bindings from [PyO3](https://pyo3.rs).
- `high-precision`: Enables [high-precision mode](https://nautilustrader.io/docs/nightly/getting_started/installation#precision-mode) to use 128-bit value types.
- `extension-module`: Builds as a Python extension module.

## Documentation

See [the docs](https://docs.rs/nautilus-testkit) for more detailed usage.

## License

The source code for NautilusTrader is available on GitHub under the [GNU Lesser General Public License v3.0](https://www.gnu.org/licenses/lgpl-3.0.en.html).

---

NautilusTrader™ is developed and maintained by Nautech Systems, a technology
company specializing in the development of high-performance trading systems.
For more information, visit <https://nautilustrader.io>.

Use of this software is subject to the [Disclaimer](https://nautilustrader.io/legal/disclaimer/).

<img src="https://github.com/nautechsystems/nautilus_trader/raw/develop/assets/nautilus-logo-white.png" alt="logo" width="300" height="auto"/>

© 2015-2026 Nautech Systems Pty Ltd. All rights reserved.