ex_machina
A flexible library for creating test data and associations in Elixir applications, with seamless Ecto integration.
What is ex_machina?
ExMachina is an Elixir library designed to create test data and associations efficiently for Elixir applications. It solves the problem of setting up complex, realistic test fixtures by providing a factory pattern with seamless Ecto integration and support for sequences, derived attributes, and lazy evaluation.
Elixir developers building applications with Ecto or other persistence layers who need to generate consistent, maintainable test data for unit and integration tests.
Developers choose ExMachina for its clean syntax, automatic association handling, and flexibility—it works out-of-the-box with Ecto but can be adapted for any persistence library, and it supports custom strategies for extended use cases.
Overview
Create test data for Elixir applications
Use Cases
Best For
- Generating test data for Ecto-based Phoenix applications
- Creating complex associations (has_many, belongs_to) in test suites
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