Testing

A mocking framework for Erlang

Mocks and explicit contracts for Elixir

Coverage report tool for Elixir with coveralls.io integration.

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 factory library by the creators of FactoryBot (née FactoryGirl)

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.

Data generation and property-based testing for Elixir

Automatically run tests when files change

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.

Ergonomic Mocking for Elixir Unit Testing

Mocks for Elixir functions

A package for automatic, comprehensive querying of Absinthe GraphQL schemas (for purposes of easily creating automatic testing setups).

Automated accessibility testing for Elixir web applications using axe-core

Automated contract testing for functions and mocks.

Build tool & plugin for generating Cobertura XML reports

Run PropEr test suites

Coveralls for Erlang

Gleam bindings to Erlang's EUnit test framework

A QuickCheck-inspired property-based testing tool for Erlang

Simple mocking library for asynchronous testing.

A Murder of Crows

Concurrent feature tests for elixir

Low-level WebDriver client for Elixir.

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

Utilities for testing GraphQL APIs

Create Graphql StreamData generator from an Absinthe schema

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

Semantic similarity testing for Elixir with the wave operator <~>

Literate test matchers for ExUnit

Interactive test runner for mix test with watch mode.

Execute PhoenixTest cases in an actual browser via Playwright.

Make private functions public if Mix.env is :test

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

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

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

Easy local cluster creation to aid in unit testing

Show status notifications for ExUnit test runs

A polite, well mannered and thoroughly upstanding testing framework for Elixir

Elixir client for the Playwright node.js server.

Simplify and reduce test clutter when testing Telemetry events

Simple macro for parameterized testing

Better output for eunit suites

Rebar3 plugin converting .coverdata files to codecov compatible JSON

NeoFaker is an Elixir library that generates fake data for testing and development.

Lcov test coverage file generator.

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

Gherkin file parser for Elixir

Snapshot testing tool using familiar assertions

Story BDD tool for executing elixir in ExUnit

Simple trace-based testing framework

Mock third-party services in ExUnit

Common Test hooks for more readable logs

Simple library to test LV components live in isolation

Webdriver library for integration testing and browser automation

Allure test report for ExUnit

A tiny library to make assertions against a HTML string

Functions to wait for some condition in tests

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

BDD testing framework for Elixir inspired by RSpec.

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

A few sentences (a paragraph) describing the project.

A mocking library particularly suitable for stateful property based testing.

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.

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.

QuickCheck-inspired property testing with integrated shrinking

ExUnit assert helpers for testing rendered HTML.

Generate a generic test execution file for SonarQube

🐦‍⬛ Snapshot testing in Gleam

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

Official Buildkite Test Analytics Collector

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

ESpec for Phoenix web framework.

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

A testing utility for running snapshot tests

Tool for mocking in tests

Concurrent mocks for gRPC Elixir

TestParrot helps in stubbing unit tests for pure functions

Implementation delegation without boilerplate

Covertool Build Plugin for Cobertura XML reports

Swagger based document driven development for ExUnit

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

Triq (Term Reductive Invariant Questant) QuickCheck

Registry to help create sandboxes for testing

Mutation testing plugin for rebar3

Isolate your tests from the world with Walkman

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

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

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

Common Tests Group Summary Hook

Fake Membrane sinks that drop incoming data

Pretty EUnit test formatters

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

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

Power Assert in Elixir. Shows evaluation results each expression.

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

Publicist allows developers to test private (defp) functions

A library for mocking Elixir protocols

Test factories for Ash resources.

A mock logging backend for Elixir unit tests

A collection of factories and helpers for testing ecto schemas

Opinionated library for testing timer-based Elixir code

Helpers and assertions extracted from espec_phoenix