mox vs meck

mox

Mocks and explicit contracts in Elixir (by dashbitco)

Testing

Source Code

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meck

A mocking library for Erlang (by eproxus)

Testing Erlang mocking-library Meck

Source Code

eproxus.github.io

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mox		meck
	Project
6	Mentions	1
1,289	Stars	808
0.9%	Growth	-
6.0	Activity	4.9
about 1 month ago	Latest Commit	3 months ago
Elixir	Language	Erlang
Apache License 2.0	License	Apache License 2.0

The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.

mox

Posts with mentions or reviews of mox. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-04-18.

Dealing with random number in tests
1 project | /r/elixir | 5 Dec 2023
An Introduction to Mocking Tools for Elixir
7 projects | dev.to | 18 Apr 2023

Mox helps get around these issues by ensuring explicit contracts. Read Mocks and Explicit Contracts for more details.
How to ignore a child of a Supervisor not being able to start during tests?
3 projects | /r/elixir | 11 Jun 2022

In order to do this you may use mock (which is simple to use), mox (they have pretty compelling arguments why not to mock traditionally), or specifically for http requests, bypass.
Como testes ajudam a melhorar o design do código?
2 projects | dev.to | 20 May 2022
Elixir: Testando chamadas de uma API externa
4 projects | dev.to | 20 May 2022
8 Common Causes of Flaky Tests in Elixir
2 projects | dev.to | 4 Jan 2022

Your options are mock ets/persistent_term — after all, we don't need to test that these things do what they say (Erlang does that for us!) — or have the tests run synchronously. Prefer the former! Mox is a great choice for this sort of work.

meck

Posts with mentions or reviews of meck. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-04-18.

An Introduction to Mocking Tools for Elixir
7 projects | dev.to | 18 Apr 2023

Mock is the first result you will see when searching “Elixir Mock”, and is a wrapper around Erlang’s meck that provides easy mocking macros for Elixir.

What are some alternatives?

When comparing mox and meck you can also consider the following projects:

mock - Mocking library for Elixir language

ex_machina - Create test data for Elixir applications

hound - Elixir library for writing integration tests and browser automation

patch - Ergonomic Mocking for Elixir

ecto_it - Ecto plugin with default configuration for repos for testing different ecto plugins with databases

ElixirMock - Creates clean, concurrent, inspectable mocks from elixir modules

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

proper - PropEr: a QuickCheck-inspired property-based testing tool for Erlang

bypass - 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.

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