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.

Mocks for Elixir functions

Automated contract testing for functions and mocks.

Ergonomic Mocking for Elixir Unit Testing

Build tool & plugin for generating Cobertura XML reports

Simple mocking library for asynchronous testing.

Run PropEr test suites

Coveralls for Erlang

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

Gleam bindings to Erlang's EUnit test framework

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.

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).

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

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

Literate test matchers for ExUnit

Interactive test runner for mix test with watch mode.

Show status notifications for ExUnit test runs

Simple macro for parameterized testing

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

Execute PhoenixTest cases in an actual browser via Playwright.

Easy local cluster creation to aid in unit testing

A Murder of Crows

Utilities for testing GraphQL APIs

Lcov test coverage file generator.

Simplify and reduce test clutter when testing Telemetry events

Make private functions public if Mix.env is :test

Snapshot testing tool using familiar assertions

BDD testing framework for Elixir inspired by RSpec.

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

Simple library to test LV components live in isolation

Better output for eunit suites

Mock third-party services in ExUnit

Webdriver library for integration testing and browser automation

Rebar3 plugin converting .coverdata files to codecov compatible JSON

Implementation delegation without boilerplate

Elixir client for the Playwright node.js server.

QuickCheck-inspired property testing with integrated shrinking

Gherkin file parser for Elixir

Functions to wait for some condition in tests

Create Graphql StreamData generator from an Absinthe schema

A mocking library particularly suitable for stateful property based testing.

Story BDD tool for executing elixir in ExUnit

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

Simple trace-based testing framework

Common Test hooks for more readable logs

A few sentences (a paragraph) describing the project.

A library to declaratively write testable effects for asynchronous testing

Pretty EUnit test formatters

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.

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

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.

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.

Registry to help create sandboxes for testing

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

Generate a generic test execution file for SonarQube

🐦‍⬛ Snapshot testing in Gleam

ESpec for Phoenix web framework.

Power Assert in Elixir. Shows evaluation results each expression.

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

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

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

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

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

Covertool Build Plugin for Cobertura XML reports

Tool for mocking in tests

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 library for mocking Elixir protocols

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.

A testing utility for running snapshot tests

TestParrot helps in stubbing unit tests for pure functions

Helpers and assertions extracted from espec_phoenix

Plug integration for Tapper.

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

Isolate your tests from the world with Walkman

A collection of factories and helpers for testing ecto schemas

Test factories for Ash resources.

Official Buildkite Test Analytics Collector

ExUnit assert helpers for testing rendered HTML.

A Testing Framework for LFE

Concurrent mocks for gRPC Elixir

Common Tests Group Summary Hook

Set up stateful doctests

An Elixir mock HTTP(S) server useful for testing HTTP(S) clients.

A mock logging backend for Elixir unit tests

Swagger based document driven development for ExUnit

Opinionated library for testing timer-based Elixir code

A tiny library to make assertions against a HTML string

Allure test report for ExUnit

Fake Membrane sinks that drop incoming data

A stateful mock Stripe server for testing Elixir applications

FakerElixir generates fake data for you.

test

A simple clock protocol for time traveling in tests.

Triq (Term Reductive Invariant Questant) QuickCheck

Elixir implementation of the cucumber messages protobuf schema

WCAG validator for the NLdoc specification.

Test your package against different versions of its dependencies

An ExUnit formatter to visualize test execution

Publicist allows developers to test private (defp) functions