Testing

A mocking framework for Erlang

Mocks and explicit contracts for Elixir

Coverage report tool for Elixir with coveralls.io integration.

A factory library by the creators of FactoryBot (née FactoryGirl)

An ExUnit.Formatter that produces an XML report of the tests run in the project _build dir. It is a good fit with Jenkins test reporting plugin, for example.

A mocking library for the Elixir language. We use the Erlang meck library to provide module mocking functionality for Elixir. It uses macros in Elixir to expose the functionality in a convenient manner for integrating in Elixir tests.

Automatically run tests when files change

Data generation and property-based testing for Elixir

Bypass provides a quick way to create a custom plug that can be put in place instead of an actual HTTP server to return prebaked responses to client requests. This is helpful when you want to create a mock HTTP server and test how your HTTP client handles different types of server responses.

Mocks for Elixir functions

Automated contract testing for functions and mocks.

Ergonomic Mocking for Elixir Unit Testing

Run PropEr test suites

Build tool & plugin for generating Cobertura XML reports

Coveralls for Erlang

HTTP request/response recording library for elixir, inspired by VCR.

Simple mocking library for asynchronous testing.

A QuickCheck-inspired property-based testing tool for Erlang

Low-level WebDriver client for Elixir.

Concurrent feature tests for elixir

Helpful functions with great error messages to help you write better tests.

Gleam bindings to Erlang's EUnit test framework

Literate test matchers for ExUnit

Simple macro for parameterized testing

Show status notifications for ExUnit test runs

Interactive test runner for mix test with watch mode.

Simplify and reduce test clutter when testing Telemetry events

Simple library to test LV components live in isolation

TestParrot helps in stubbing unit tests for pure functions

A utility for defining eminently readable parameterized (or example-based) tests in ExUnit

Execute PhoenixTest cases in an actual browser via Playwright.

A few sentences (a paragraph) describing the project.

Lcov test coverage file generator.

ExUnit's assert on steroids that writes and updates tests for you

Snapshot testing tool using familiar assertions

PropCheck provides property based testing and is an Elixir layer around PropEr. It is also inspired by Quviq's QuickCheck Elixir library.

Make private functions public if Mix.env is :test

Easy local cluster creation to aid in unit testing

Simple trace-based testing framework

BDD testing framework for Elixir inspired by RSpec.

Webdriver library for integration testing and browser automation

Mock third-party services in ExUnit

Common Test hooks for more readable logs

Wormwood is a tiny library to aid in testing GraphQL queries against an Absinthe schema. It allows you to test your query documents inside ExUnit test modules, and requires no HTTP requests to occur during testing.

Tapex is a TAP (Test Anything Protocol) formatter for ExUnit.

Rebar3 plugin converting .coverdata files to codecov compatible JSON

GrpcMock is mocking library for [Elixir gRPC implementation](https://github.com/tony612/grpc-elixir). It provides seamless mock creation based on `pb.ex` definition and usual mocking "expect" - "verify" mechanisms.

Better output for eunit suites

Pretty EUnit test formatters

Covertool Build Plugin for Cobertura XML reports

Generate a generic test execution file for SonarQube

Set up stateful doctests

With FakeServer you can create individual HTTP servers for each test case, allowing external requests to be tested without the need for mocks.

Library for stubbing and setting expectations on HTTP requests in Erlang

A mocking library particularly suitable for stateful property based testing.

Functions to wait for some condition in tests

A testing utility for running snapshot tests

A utility module that helps you iterate faster on unit tests. This module lets execute specific tests from within a running iex shell to avoid needing to start and stop the whole application every time.

A library to declaratively write testable effects for asynchronous testing

Gherkin file parser for Elixir

ESpec for Phoenix web framework.

Power Assert in Elixir. Shows evaluation results each expression.

Concurrent mocks for gRPC Elixir

A convenience library to spawn plug router with your application for testing purposes

Lightweight server-side integration test functions for Phoenix. Optimized for Elixir Pipes and the existing Phoenix.ConnTest framework to emphasize both speed and readability.

Double is a simple library to help build injectable dependencies for your tests. It does NOT override behavior of existing modules or functions.

The library outputs test results to the console, which helps speed up the red-green test correction cycle (inspired by rspec)

Automated accessibility testing for Elixir web applications using axe-core

ResponseSnapshot is a testing tool for Elixir that captures the output of responses and ensures that they do not change in between test runs.

Tool for mocking in tests

Story BDD tool for executing elixir in ExUnit

HTMLTestHelpers provides function helpers for unit testing allowing easy assertions for HTML elements data queried by data-testid attribute.

Isolate your tests from the world with Walkman

Spin up dynamic clusters in ExUnit tests with no special setup necessary.

A mix task for running test suites

🐦‍⬛ Snapshot testing in Gleam

A mix task to run eunit tests, works for umbrella projects

ExUnit assert helpers for testing rendered HTML.

ExUnit assertions for Ecto schemas

A collection of factories and helpers for testing ecto schemas

Testcontainers is an Elixir library that supports ExUnit tests, providing lightweight, throwaway instances of common databases, Selenium web browsers, or anything else that can run in a Docker container.

A mock logging backend for Elixir unit tests

Opinionated library for testing timer-based Elixir code

Publicist allows developers to test private (defp) functions

Test factories for Ash resources.

100% code coverage testing tool forked from parroty/excoveralls

A mocking library for ExUnit inspired by RSpec and based on meck.

Plug integration for Tapper.

Registry to help create sandboxes for testing

A simplified method for configuring modules to be mockable with Mox in Elixir projects.

Erlang port of Hamcrest

Triq (Term Reductive Invariant Questant) QuickCheck

Helpers and assertions extracted from espec_phoenix

Macros to support assertions/refutations that might not be correct immediately but will eventually become so due to, say, eventual consistency.

An ExUnit formatter to visualize test execution

Elixir implementation of the cucumber messages protobuf schema

Simulate remote HTTP services with local Bandit servers.

Elixir Gherkin parser.

A parameterized testing library attempting to emulate the data driven testing of the [Spock Framework](http://spockframework.org/).

Common Tests Group Summary Hook

Mutation testing for Elixir

Implementation delegation without boilerplate

Test your package against different versions of its dependencies

A utility for defining eminently readable example-based tests in ExUnit

A testing framework to help you shoot for the stars

FakerElixir generates fake data for you.

A simple property-based testing framework written in pure Elixir.

Protocol-based mocks and explicit contracts in Elixir

Test factories generated from database schema

Factory Library for Ecto schemas

Addons for eunit

Story BDD tool based on cucumber. Parses Gherkin formatted feature files and executes them as tests.

A wrapper around Bypass. Double Bypass makes configuring and initializing Bypass easy. It also removes redundant test assertion code, and ecourages testing external requests in a self documenting manner.

Phoenix and LiveView visual regression testing tool for the GetSnappy platform

Stubr is a set of functions helping people to create stubs and spies in Elixir.

https://github.com/edgurgel/httparrot

Cucumber for Elixir: BDD testing framework with Gherkin syntax

A mocking libary for the Elixir language. We use the Erlang meck library to provide module mocking functionality for Elixir. It uses macros in Elixir to expose the functionality in a convenient manner for integrating in Elixir tests.

A utility library for NLdoc providing various test helpers.