Testing

A mocking framework for Erlang

Coverage report tool for Elixir with coveralls.io integration.

Mocks and explicit contracts for Elixir

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)

Data generation and property-based testing for Elixir

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

Ergonomic Mocking for Elixir Unit Testing

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.

Build tool & plugin for generating Cobertura XML reports

Automated accessibility testing for Elixir web applications using axe-core

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

Gleam bindings to Erlang's EUnit test framework

Run PropEr test suites

Coveralls for Erlang

A QuickCheck-inspired property-based testing tool for Erlang

Concurrent feature tests for elixir

Simple mocking library for asynchronous testing.

Low-level WebDriver client for Elixir.

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

A Murder of Crows

Utilities for testing GraphQL APIs

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

Create Graphql StreamData generator from an Absinthe schema

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

Literate test matchers for ExUnit

Make private functions public if Mix.env is :test

Execute PhoenixTest cases in an actual browser via Playwright.

Interactive test runner for mix test with watch mode.

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

Show status notifications for ExUnit test runs

Simplify and reduce test clutter when testing Telemetry events

Easy local cluster creation to aid in unit testing

Elixir client for the Playwright node.js server.

Rebar3 plugin converting .coverdata files to codecov compatible JSON

Simple macro for parameterized testing

Gherkin file parser for Elixir

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

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

Better output for eunit suites

Story BDD tool for executing elixir in ExUnit

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

Snapshot testing tool using familiar assertions

Lcov test coverage file generator.

Mock third-party services in ExUnit

Simple trace-based testing framework

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

Common Test hooks for more readable logs

Webdriver library for integration testing and browser automation

Simple library to test LV components live in isolation

A few sentences (a paragraph) describing the project.

A library to declaratively write testable effects for asynchronous testing

BDD testing framework for Elixir inspired by RSpec.

Functions to wait for some condition in tests

Allure test report for ExUnit

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

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

A tiny library to make assertions against a HTML string

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.

🐦‍⬛ 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.

ExUnit assert helpers for testing rendered HTML.

A mocking library particularly suitable for stateful property based 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.

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.

Generate a generic test execution file for SonarQube

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

QuickCheck-inspired property testing with integrated shrinking

Concurrent mocks for gRPC Elixir

ESpec for Phoenix web framework.

Official Buildkite Test Analytics Collector

Tool for mocking in tests

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

Mutation testing plugin for rebar3

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

TestParrot helps in stubbing unit tests for pure functions

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

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

A testing utility for running snapshot tests

Isolate your tests from the world with Walkman

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

Covertool Build Plugin for Cobertura XML reports

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

Registry to help create sandboxes for testing

Pretty EUnit test formatters

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

Real-time Buildkite annotations for ExUnit test failures

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

Fake Membrane sinks that drop incoming data

Triq (Term Reductive Invariant Questant) QuickCheck

Test factories for Ash resources.

Common Tests Group Summary Hook

Publicist allows developers to test private (defp) functions

Power Assert in Elixir. Shows evaluation results each expression.

Property-based testing and metamorphic testing combinator library for Gleam

VCR-style record-and-replay library for Req HTTP client

Simulate remote HTTP services with local Bandit servers.

Playwright is an Elixir library to automate Chromium, Firefox and WebKit browsers with a single API. Playwright delivers automation that is ever-green, capable, reliable and fast.

Opinionated library for testing timer-based Elixir code

A library for mocking Elixir protocols

A collection of goodies for the property-based testing framework PropEr